On this day, 33 years ago, on July 6, 1992 (June 7, 1992 in the lunar calendar), rice cultivation scientist Yang Lijiong passed away. Photo: Yang Lijiong Yang Lijiong, a rice cultivation scientist. He went deep into rural areas, connected with production, and devoted himself to agricultural technology improvement research. He achieved remarkable results in summarizing, improving and popularizing the experience of national agricultural worker Chen Yongkang's high-yield rice cultivation; participated in technical foreign aid three times and was well received; in his later years, he discussed the middle and lower reaches of the Yangtze River. He gained some experience in the goals, directions and approaches of agricultural modernization in the region, and contributed to the development of crop cultivation science in my country. Yang Lijiong was born on November 11, 1912 in Lishui County, Jiangsu Province. In his boyhood, the country and the nation were in an autumn when internal and external troubles were intertwined. The countryside was deserted and farmers worked hard all year round without food and clothing, which inspired his enthusiasm to learn from agriculture and rejuvenate the country. After graduating from middle school in 1933, he was transferred to the College of Agriculture of Central University. During his studies, influenced by Zhou Shilu and other teachers 'strong professionalism and rigorous academic spirit, he read extensively and studied hard, mastered biological experimental technology and knowledge, and conducted cytological research on rice embryonic development and artificial mutation of fertilized eggs. In 1937, Yang Lijiong graduated from university and worked at the National Rice and Wheat Improvement Institute of the Central Agricultural Experimental Institute. He immediately participated in the verification of rural rice seeds in southern Anhui. After the outbreak of the Anti-Japanese War, he first moved south to Hunan with the Institute of Central Agriculture, and then moved west to Chengdu, Sichuan and Beibei, Chongqing. He conducted research on farm rice variety verification and tobacco and hemp rice cultivation in the western Sichuan Plain. He wrote "Rice Cultivation in the Chengdu Plain","Investigation Report on the Verification of Farm Rice Varieties in Sichuan Province" and "Research on Rice Cultivation and Variety Adaptation in Tobacco and Sesame Fields". From then on, he entered the field of scientific research on rice cultivation. After the founding of the People's Republic of China to conduct in-depth research and solve production technology problems, the Central Agricultural Experimental Institute was renamed the East China Institute of Agricultural Sciences, and Yang Lijiong was transferred back from Hunan to Nanjing East China Institute of Agricultural Sciences. At that time, the national economy was recovering and there was an urgent need to increase grain production. In 1953, he led a working group to visit rural areas north and south of the Yangtze River to investigate and study key technical issues in increasing agricultural production. In response to the problem of rotten rice seedlings, he proposed changing rice seedlings to semi-dry seedlings, arranging suitable sowing dates according to regional climate characteristics and variety characteristics, grasping the "cold tail and warm head" timing during weather changes, and strengthening water slurry management. Complete sets of technology. It has made contributions to ensuring complete seedlings, preventing rotten seedlings, saving seeds, and cultivating strong seedlings. Historically, only one-ripe early indica rice was planted in the Lixiahe area of Jiangsu Province, and the annual output was low. In order to tap the potential of light and temperature production in this area, Yang Lijiong, together with the production department, changed one crop a year to two crops a year, focusing on the research of "rice-wheat" and "rice-green manure" water-drought rotation and "retting to drought" improvement. Technology such as soil environment has increased the yield per unit area. With the completion of water conservancy projects such as Jiangdu overturning sluice, this technology has been promoted and applied in the area, producing good economic and social benefits. In 1951, rice borers were rampant in various parts of Jiangsu Province, losing tens of thousands of tons of rice. Yang Lijiong and relevant experts went deep into the rural areas of Taihu Lake area and found that the severity of borers was closely related to the heading date and cultivation techniques of varieties. As long as appropriate varieties and corresponding cultivation methods are selected, supplemented by drug control, the harm of borers can be effectively reduced or eliminated. This set of practices was later summarized as "cultivating and controlling borers." Combining with model workers and summarizing the experience of high-yield rice Yang Lijiong has made valuable contributions in insisting on the combination of professionals and farmers, establishing rural bases to carry out scientific research, transforming scientific and technological achievements into productivity on the spot, and promoting the development of agricultural production. In 1958, Chen Yongkang, a national agricultural high-yield model, proposed the "three yellows and three blacks" experience of high-yield single-season late rice at the "National Rice High-yield Science and Technology Exchange Conference" in Suzhou, which attracted the attention and interest of experts attending the meeting. In the autumn of that year, Chen Yongkang was transferred to the Jiangsu Branch of China Academy of Agricultural Sciences to conduct research on high-yield rice cultivation. Yang Lijiong was ordered to form a collaborative group with Chen Yongkang, Cui Jilin, Tang Yugeng and others involving disciplines such as cultivation, physiology, soil fertilizer, meteorology, plant diseases and agricultural physics to carry out comprehensive research with the overall goal of high rice yield. During these three years, in addition to presiding over the daily work of this collaborative research, Yang Lijiong also insisted on participating in the research activities of the cultivation professional group and learning field operation techniques from Chen Yongkang. The collaborative group believes that Chen Yongkang's seedling-watching diagnosis technology aims to achieve a certain healthy appearance under the comprehensive consideration of "looking forward and looking back at the time", and uses leaf color as a sensitive signal to measure growth and predict appearance to conduct comprehensive health diagnosis. They clarified the intrinsic essence and biological mechanism of the alternating changes in "black" and "yellow" leaf colors, and based on demonstrating the scientific basis for Chen Yongkang's set of high-yield techniques, formulated diagnostic indicators for coordinated growth in various growth periods. Subsequently, Yang Lijiong wrote a series of papers. Among them, the article "Diagnosis and Cultivation Techniques for High-yield Late Japonica Rice" was read out at the Beijing Scientific Symposium in 1964 and aroused great interest from experts from various countries. Other experts from the collaborative group also published a number of papers from different professional perspectives, demonstrating the scientific connotation of Chen Yongkang's high-yield rice experience, which greatly sublimated people's understanding of Chen Yongkang's high-yield experience. In order to transform scientific research results into productivity, from 1962 to 1965, Yang Lijiong, Chen Yongkang and members of the collaboration group successively established Chen Yongkang's high-yield rice technology "model sites" at the state-owned Lianhu Farm, Changqiao, Wangting and other places in Wu County, Suzhou Prefecture., planted demonstration fields, sent scientific research results to rural areas, and held farming and reading classes at the model sites, cultivating a large number of grassroots technical backbones from inside and outside the province, and spreading this set of science and technology to all directions. According to incomplete statistics, in Suzhou alone, from 1961 to 1969, 5.8 million acres of rice were planted in the region. Due to the application of this set of Chen Yongkang's high-yield cultivation techniques, the yield per mu has soared from about 250 kilograms to about 450 kilograms. According to incomplete statistics from Jiangsu, Zhejiang, Shanghai, Anhui, Hunan, Hubei and other provinces and cities, the total number of rice fields that have applied or partially applied this technology is about 150 million acres, an increase in production by about 33.2 billion kilograms. The institute combines scientific and technological personnel with model workers, multi-disciplinary and multi-department comprehensive research, laboratories, experimental demonstration fields, and large-scale production, establishes model sites in rural areas, and uses points to lead areas to transform scientific research results into productivity., and a series of measures such as cultivating grassroots technical backbones through model fields are an innovation. At the same time, this research also enriched the content of rice cultivation. This research won the 1978 National Science Conference Award. As the host, organizer and participant of the study, Yang Lijiong devoted a lot of energy and wisdom to this end. Technical foreign aid to enhance friendship and develop production. From the mid-1950s to the early 1960s, Yang Lijiong participated in technical foreign aid work three times, making important contributions to enhancing friendship with people of all countries and promoting the development of agricultural production in recipient countries. From May 1956 to May 1957, he participated in the agricultural expert group organized by the Ministry of Agriculture to provide technical assistance to Vietnam in agronomy, pastoral medicine, and plant protection. During his stay in Vietnam, he and his comrades with foreign technical assistance visited Taiping Province, Henan Province and Dai and Miao Autonomous Regions to investigate the agricultural environment, soil quality, water conservancy, varieties, production technology and disaster conditions. They visited many farmers to understand the obstacles affecting yield and analyze the potential for increasing production. In view of local conditions, they put forward technical suggestions such as increasing multiple planting and making full use of temperature and light and land resources. In addition, they carried out rice cultivation and seedling growth in some mutual aid groups and operation groups. Experimental demonstrations such as reasonable close planting have achieved good results. Subsequently, a training class for rice farming technical cadres was held in Hanoi to systematically teach high-yield rice technologies. Yang Lijiong and other members of the Vietnam aid team introduced Vietnam's experience in establishing an agricultural technology extension station and built a demonstration agricultural test site and technology extension station for Vietnam. At the end of his work in May 1957, he was received by Chairman Ho Chi Minh and received medals and certificates awarded by Chairman Ho Chi Minh. In July 1957, Yang Lijiong was sent to Romania to provide technical assistance in rice production, which lasted for 6 months. While working in Romania, he served as the leader of the expert group and inspected 9 state-owned farms and 3 collective farms. State farms and collective farms in Romania (State farms and collective farms in Romania) are large in area and have a high level of mechanization, but the irrigation system is imperfect, with problems such as uneven emergence, many weeds and diseases, and low seed setting rate (the expert group based on the different conditions of each farm and collective farm), and put forward suggestions on improving and improving the drainage and irrigation system, improving the quality of grain land, improving fertilizer and water management, and combining cultivation with chemical control to reduce the harm of rice blast, which has attracted local attention. From November 1960 to April 1961, Yang Lijiong, as a member of the agricultural and water conservancy expert group sent to Guinea, conducted a preliminary inspection of Guinea's tea farms and water conservancy construction projects aided by my country. He collected a large amount of data and submitted a written report, which provided first-hand information for the site selection and construction of the subsequent site. From November 1957 to January 1958, he participated in the 25-member China agricultural delegation to Japan led by Minister Wang Zhen. The delegation inspected major agricultural universities and agricultural test sites from Kagoshima to Hokkaido in Japan from south to north, and visited agricultural synergy groups and farmers. This visit not only exchanged the friendship between the two peoples, but also brought back 58 rice varieties and plastic film seedling raising technology. These rice varieties were later uniformly numbered from "Nongken No. 1" to "Nongken 58" according to the length of their growth periods. Among them, medium and late japonica rice such as "Nongken 58","Nongken 57","Nongken 44" and "Nongken 46" have been used in large areas of production in East and Central China due to their high yield and high quality. Among them,"Nongken 57" and "Nongken 58" have the widest planting area and the largest application area. Until the late 1980s, they were still planted in some areas of Jiangsu and Hunan. The earliest photo-sensitive genetic male sterile material discovered in my country was mutated from "Nongken 58". From September to October 1980, Yang Lijiong participated in a comprehensive agricultural technology inspection delegation organized by China Academy of Sciences to Japan and visited Japan again. This time he served as deputy head. Over more than 20 days, he visited and inspected Japan's Agricultural Technology Research Institute, the Department of Agriculture of the University of Tokyo, agricultural test grounds, agricultural machinery companies, agricultural certification research institutions in some counties, and the window of modern new villages with large-scale operations and large machinery. -Haranoya. This inspection focused on understanding the experiences and problems of Japan's comprehensive development of agricultural modernization, collected a large amount of information on the popularization of agricultural technology, service systems and expansion of operation scale to achieve agricultural modernization in my country. The article "Inspecting Japanese Agriculture and Drawing Lessons" was published by the Jiangsu Province Agricultural Society. Exploring Agricultural Modernization in Taihu Area From the late 1970s to the early 1980s, Yang Lijiong was mainly engaged in the research of agricultural modernization in my country. He presided over the national key research project of "Jiangsu Taihu Region Agricultural Modernization Comprehensive Scientific Experimental Base" and established the Agricultural Modernization Research Institute of Jiangsu Province Academy of Agricultural Sciences, and served as the director. During this period, he also served as the leader of the "Research on High-yield Technology Development of Rice Continuous in Jiangsu Province" under the organization and leadership of the Provincial Science and Technology Commission. This work is to set up 24 100-acre high-yield test strips according to different ecological agricultural divisions to study the technical system of high yield, low consumption, and gain of the main varieties, and promote large-scale increase in production through points and areas. In the past three years, the cumulative experimental and demonstration area was 6,744.5 acres, with an average yield of 547.2 kilograms per mu, an increase of 19.57% compared with the control field, a cost reduction of 7.85%, and a net income per mu increased by 35.96%. In the past three years, the cumulative expansion and promotion area has reached 15.988 million acres, increasing the output of rice by more than 1 billion kilograms. The technical specifications for inter-species cultivation of several leading varieties in the Taihu Lake area have been initially clarified, and new enlightenment has been provided for the understanding of the laws of high-yield formation under different ecological conditions. This collective development research won the second prize for technical improvement in 1985 by the province. Regarding the issue of my country's agricultural modernization, Yang Lijiong and his colleagues emphasized that goals should be determined based on national conditions and regional characteristics, and ways and methods to achieve them should be explored, and foreign practices should not be copied. He organized more than 30 scientific and technological personnel to go deep into the Taihu Lake area to conduct investigations and research and listen to opinions from all parties. Then, under the guidance of relevant leaders of the Jiangsu Province Academy of Agricultural Sciences, he proposed agricultural resource zoning, land planning and farmland construction, agricultural mechanization, production technology systems such as agriculture, animal husbandry, fishery, silkworm and fruit, improved seed breeding and promotion system, as well as 25 small topics in eight aspects including environmental protection and energy, social team industrialization, and agricultural economy, which were newly established at that time. Research tasks of the Agricultural Modernization Research Institute. It has also established two base counties, Wuxi and Wuxian, and two comprehensive scientific experimental bases, Yuexi and Dongting (such as four modern production bases for diversified operations of fishery, poultry, silkworm and fruit), forming a research network. The institute organized collaborative research involving more than 20 units and 200 scientific and technological personnel from provincial, municipal and county scientific research, production, administrative departments and colleges to discuss the goals and conditions of agricultural modernization in economically developed areas, typical of Taihu Lake area., ways and measures. This is the first time in China to organize and collaborate in a planned manner to explore the path of developing agricultural modernization in southern my country. In the late 1970s, the Taihu Lake area mainly implemented the "double and triple cropping" system. Not only was the farming season tight, but also the labor intensity was very high. Farmers are eager to change the situation of "facing the loess and facing the sky" for thousands of years, and require the gradual realization of mechanization of production to reduce labor intensity and improve operating efficiency. Under the initiative of Yang Lijiong, agricultural technology and agricultural machinery personnel carried out collaborative research, using a 1000-acre brigade (village) as a typical unit to conduct selection and supporting research on various agricultural machinery, and combined with other contents to explore how to improve labor productivity and machinery utilization rate. After several years of hard work, the expected results have been achieved. Yang Lijiong believes that cultivation science is a comprehensive science. Cultivation cannot be studied just for cultivation. Only comprehensive research combined with agricultural machinery, farming, soil fertilizer, meteorology, ecology, agricultural economics and other majors can it have vitality. In his article "Creating a New Situation in Crop Cultivation", he mentioned that "we must establish the view that crop cultivation is a subsystem of the large agricultural system" and strive to achieve regionalization, standardization and standardization. He believes that in modern agricultural production, it is not enough to simply put forward the slogan of "agriculture is suitable for agriculture, forest is suitable for forests, and combination of agriculture, forestry and animal husbandry". We must propose an optimal plan suitable for the local area that includes both qualitative and quantitative analysis. Only then can we scientifically direct production. Therefore, when carrying out the research on the above-mentioned topics of the institute, they all urged relevant disciplines to cooperate with each other to explore the laws of high-yield crops from different perspectives. In terms of research methods, he advocated that comprehensive research does not mean abandoning individual research. He believes that the former is developing towards a holistic approach, while the latter is deepening into the micro world, and the two complement each other. In terms of topic research, he insisted on combining "soft" topics and "hard" topics with appropriate proportions. There must be "software" to provide leaders at all levels with agricultural development strategies and development trend predictions to avoid policy and strategy mistakes, and there must also be "hardware" that can directly produce social and economic benefits. The Taihu Lake area in Jiangsu is famous for its intensive farming, but the cultivated land has dropped sharply, the population has increased sharply, and the rise of township enterprises have brought about serious problems such as energy shortage, transfer of agricultural labor, and environmental pollution. Yang Lijiong believes that in the future, it is impossible for the Taihu Lake area to implement labor-and resource-intensive agriculture as in the past, but should be replaced by technology-intensive agriculture. He asked scientific and technological personnel to focus on research on less than 1 acre of cultivated land per capita to create agricultural productivity that can best tap the potential of land resources, bear a large population load, and achieve sustained high yields. This is agricultural modernization that suits my country's national conditions. He has been stationed and running for many years, not only taking care of the inside of the institute, but also considering the outside; he has to organize the implementation of the project and cooperate fully with the cooperating units. He went from mastering the research direction to working progress; From the formation of the results to the promotion and application, even the research report must be revised word for word. It can be said that Yang Lijiong's painstaking efforts have been devoted to the development of agricultural modernization in Taihu region and the achievements of the Agricultural Modernization Research Institute. Under the careful guidance of Yang Lijiong, the Agricultural Modernization Office of the Academy of Agricultural Sciences of Jiangsu Province has gradually grown and developed. It has completed more than 90 research projects and won more than 20 awards, including 2 second prizes for National Science and Technology Progress Awards, 2 second prizes for Ministry Science and Technology Progress Awards, 3 third prizes, and 5 provincial and municipal scientific and technological progress awards. The direct economic benefits generated by the promotion and application of scientific research results during the "Sixth Five-Year Plan" period alone totaled 630 million yuan. As an entity adapted to carry out comprehensive research on agricultural modernization in economically developed areas in southern my country, it has established collaborative relationships with nearly ten countries in the world and organized dozens of academic exchanges involving domestic and foreign experts and scholars. In October 1989, the Institute of Agricultural Modernization of Jiangsu Province Academy of Agricultural Sciences held a celebration of the 10th anniversary of its establishment. People have not forgotten the old director who has made great contributions to this institute and has now retired. They specially invited him to sit at the top of the rostrum to congratulate and report to him. Yang Lijiong pointed out in his speech: "It will take some time for my country to realize agricultural modernization, and it will also require the hard efforts of all of you here." Lao Yang's words were sincere. May the latter carry forward the past and forge ahead into the future, work hard, and make new contributions to the realization of my country's agricultural modernization. Yang Lijiong died in Nanjing on July 6, 1992 due to illness at the age of 80.On this day, 33 years ago, on July 6, 1992 (June 7, 1992 in the lunar calendar), rice cultivation scientist Yang Lijiong passed away. Photo: Yang Lijiong Yang Lijiong, a rice cultivation scientist. He went deep into rural areas, connected with production, and devoted himself to agricultural technology improvement research. He achieved remarkable results in summarizing, improving and popularizing the experience of national agricultural worker Chen Yongkang's high-yield rice cultivation; participated in technical foreign aid three times and was well received; in his later years, he discussed the middle and lower reaches of the Yangtze River. He gained some experience in the goals, directions and approaches of agricultural modernization in the region, and contributed to the development of crop cultivation science in my country. Yang Lijiong was born on November 11, 1912 in Lishui County, Jiangsu Province. In his boyhood, the country and the nation were in an autumn when internal and external troubles were intertwined. The countryside was deserted and farmers worked hard all year round without food and clothing, which inspired his enthusiasm to learn from agriculture and rejuvenate the country. After graduating from middle school in 1933, he was transferred to the College of Agriculture of Central University. During his studies, influenced by Zhou Shilu and other teachers 'strong professionalism and rigorous academic spirit, he read extensively and studied hard, mastered biological experimental technology and knowledge, and conducted cytological research on rice embryonic development and artificial mutation of fertilized eggs. In 1937, Yang Lijiong graduated from university and worked at the National Rice and Wheat Improvement Institute of the Central Agricultural Experimental Institute. He immediately participated in the verification of rural rice seeds in southern Anhui. After the outbreak of the Anti-Japanese War, he first moved south to Hunan with the Institute of Central Agriculture, and then moved west to Chengdu, Sichuan and Beibei, Chongqing. He conducted research on farm rice variety verification and tobacco and hemp rice cultivation in the western Sichuan Plain. He wrote "Rice Cultivation in the Chengdu Plain","Investigation Report on the Verification of Farm Rice Varieties in Sichuan Province" and "Research on Rice Cultivation and Variety Adaptation in Tobacco and Sesame Fields". From then on, he entered the field of scientific research on rice cultivation. After the founding of the People's Republic of China to conduct in-depth research and solve production technology problems, the Central Agricultural Experimental Institute was renamed the East China Institute of Agricultural Sciences, and Yang Lijiong was transferred back from Hunan to Nanjing East China Institute of Agricultural Sciences. At that time, the national economy was recovering and there was an urgent need to increase grain production. In 1953, he led a working group to visit rural areas north and south of the Yangtze River to investigate and study key technical issues in increasing agricultural production. In response to the problem of rotten rice seedlings, he proposed changing rice seedlings to semi-dry seedlings, arranging suitable sowing dates according to regional climate characteristics and variety characteristics, grasping the "cold tail and warm head" timing during weather changes, and strengthening water slurry management. Complete sets of technology. It has made contributions to ensuring complete seedlings, preventing rotten seedlings, saving seeds, and cultivating strong seedlings. Historically, only one-ripe early indica rice was planted in the Lixiahe area of Jiangsu Province, and the annual output was low. In order to tap the potential of light and temperature production in this area, Yang Lijiong, together with the production department, changed one crop a year to two crops a year, focusing on the research of "rice-wheat" and "rice-green manure" water-drought rotation and "retting to drought" improvement. Technology such as soil environment has increased the yield per unit area. With the completion of water conservancy projects such as Jiangdu overturning sluice, this technology has been promoted and applied in the area, producing good economic and social benefits. In 1951, rice borers were rampant in various parts of Jiangsu Province, losing tens of thousands of tons of rice. Yang Lijiong and relevant experts went deep into the rural areas of Taihu Lake area and found that the severity of borers was closely related to the heading date and cultivation techniques of varieties. As long as appropriate varieties and corresponding cultivation methods are selected, supplemented by drug control, the harm of borers can be effectively reduced or eliminated. This set of practices was later summarized as "cultivating and controlling borers." Combining with model workers and summarizing the experience of high-yield rice Yang Lijiong has made valuable contributions in insisting on the combination of professionals and farmers, establishing rural bases to carry out scientific research, transforming scientific and technological achievements into productivity on the spot, and promoting the development of agricultural production. In 1958, Chen Yongkang, a national agricultural high-yield model, proposed the "three yellows and three blacks" experience of high-yield single-season late rice at the "National Rice High-yield Science and Technology Exchange Conference" in Suzhou, which attracted the attention and interest of experts attending the meeting. In the autumn of that year, Chen Yongkang was transferred to the Jiangsu Branch of China Academy of Agricultural Sciences to conduct research on high-yield rice cultivation. Yang Lijiong was ordered to form a collaborative group with Chen Yongkang, Cui Jilin, Tang Yugeng and others involving disciplines such as cultivation, physiology, soil fertilizer, meteorology, plant diseases and agricultural physics to carry out comprehensive research with the overall goal of high rice yield. During these three years, in addition to presiding over the daily work of this collaborative research, Yang Lijiong also insisted on participating in the research activities of the cultivation professional group and learning field operation techniques from Chen Yongkang. The collaborative group believes that Chen Yongkang's seedling-watching diagnosis technology aims to achieve a certain healthy appearance under the comprehensive consideration of "looking forward and looking back at the time", and uses leaf color as a sensitive signal to measure growth and predict appearance to conduct comprehensive health diagnosis. They clarified the intrinsic essence and biological mechanism of the alternating changes in "black" and "yellow" leaf colors, and based on demonstrating the scientific basis for Chen Yongkang's set of high-yield techniques, formulated diagnostic indicators for coordinated growth in various growth periods. Subsequently, Yang Lijiong wrote a series of papers. Among them, the article "Diagnosis and Cultivation Techniques for High-yield Late Japonica Rice" was read out at the Beijing Scientific Symposium in 1964 and aroused great interest from experts from various countries. Other experts from the collaborative group also published a number of papers from different professional perspectives, demonstrating the scientific connotation of Chen Yongkang's high-yield rice experience, which greatly sublimated people's understanding of Chen Yongkang's high-yield experience. In order to transform scientific research results into productivity, from 1962 to 1965, Yang Lijiong, Chen Yongkang and members of the collaboration group successively established Chen Yongkang's high-yield rice technology "model sites" at the state-owned Lianhu Farm, Changqiao, Wangting and other places in Wu County, Suzhou Prefecture., planted demonstration fields, sent scientific research results to rural areas, and held farming and reading classes at the model sites, cultivating a large number of grassroots technical backbones from inside and outside the province, and spreading this set of science and technology to all directions. According to incomplete statistics, in Suzhou alone, from 1961 to 1969, 5.8 million acres of rice were planted in the region. Due to the application of this set of Chen Yongkang's high-yield cultivation techniques, the yield per mu has soared from about 250 kilograms to about 450 kilograms. According to incomplete statistics from Jiangsu, Zhejiang, Shanghai, Anhui, Hunan, Hubei and other provinces and cities, the total number of rice fields that have applied or partially applied this technology is about 150 million acres, an increase in production by about 33.2 billion kilograms. The institute combines scientific and technological personnel with model workers, multi-disciplinary and multi-department comprehensive research, laboratories, experimental demonstration fields, and large-scale production, establishes model sites in rural areas, and uses points to lead areas to transform scientific research results into productivity., and a series of measures such as cultivating grassroots technical backbones through model fields are an innovation. At the same time, this research also enriched the content of rice cultivation. This research won the 1978 National Science Conference Award. As the host, organizer and participant of the study, Yang Lijiong devoted a lot of energy and wisdom to this end. Technical foreign aid to enhance friendship and develop production. From the mid-1950s to the early 1960s, Yang Lijiong participated in technical foreign aid work three times, making important contributions to enhancing friendship with people of all countries and promoting the development of agricultural production in recipient countries. From May 1956 to May 1957, he participated in the agricultural expert group organized by the Ministry of Agriculture to provide technical assistance to Vietnam in agronomy, pastoral medicine, and plant protection. During his stay in Vietnam, he and his comrades with foreign technical assistance visited Taiping Province, Henan Province and Dai and Miao Autonomous Regions to investigate the agricultural environment, soil quality, water conservancy, varieties, production technology and disaster conditions. They visited many farmers to understand the obstacles affecting yield and analyze the potential for increasing production. In view of local conditions, they put forward technical suggestions such as increasing multiple planting and making full use of temperature and light and land resources. In addition, they carried out rice cultivation and seedling growth in some mutual aid groups and operation groups. Experimental demonstrations such as reasonable close planting have achieved good results. Subsequently, a training class for rice farming technical cadres was held in Hanoi to systematically teach high-yield rice technologies. Yang Lijiong and other members of the Vietnam aid team introduced Vietnam's experience in establishing an agricultural technology extension station and built a demonstration agricultural test site and technology extension station for Vietnam. At the end of his work in May 1957, he was received by Chairman Ho Chi Minh and received medals and certificates awarded by Chairman Ho Chi Minh. In July 1957, Yang Lijiong was sent to Romania to provide technical assistance in rice production, which lasted for 6 months. While working in Romania, he served as the leader of the expert group and inspected 9 state-owned farms and 3 collective farms. State farms and collective farms in Romania (State farms and collective farms in Romania) are large in area and have a high level of mechanization, but the irrigation system is imperfect, with problems such as uneven emergence, many weeds and diseases, and low seed setting rate (the expert group based on the different conditions of each farm and collective farm), and put forward suggestions on improving and improving the drainage and irrigation system, improving the quality of grain land, improving fertilizer and water management, and combining cultivation with chemical control to reduce the harm of rice blast, which has attracted local attention. From November 1960 to April 1961, Yang Lijiong, as a member of the agricultural and water conservancy expert group sent to Guinea, conducted a preliminary inspection of Guinea's tea farms and water conservancy construction projects aided by my country. He collected a large amount of data and submitted a written report, which provided first-hand information for the site selection and construction of the subsequent site. From November 1957 to January 1958, he participated in the 25-member China agricultural delegation to Japan led by Minister Wang Zhen. The delegation inspected major agricultural universities and agricultural test sites from Kagoshima to Hokkaido in Japan from south to north, and visited agricultural synergy groups and farmers. This visit not only exchanged the friendship between the two peoples, but also brought back 58 rice varieties and plastic film seedling raising technology. These rice varieties were later uniformly numbered from "Nongken No. 1" to "Nongken 58" according to the length of their growth periods. Among them, medium and late japonica rice such as "Nongken 58","Nongken 57","Nongken 44" and "Nongken 46" have been used in large areas of production in East and Central China due to their high yield and high quality. Among them,"Nongken 57" and "Nongken 58" have the widest planting area and the largest application area. Until the late 1980s, they were still planted in some areas of Jiangsu and Hunan. The earliest photo-sensitive genetic male sterile material discovered in my country was mutated from "Nongken 58". From September to October 1980, Yang Lijiong participated in a comprehensive agricultural technology inspection delegation organized by China Academy of Sciences to Japan and visited Japan again. This time he served as deputy head. Over more than 20 days, he visited and inspected Japan's Agricultural Technology Research Institute, the Department of Agriculture of the University of Tokyo, agricultural test grounds, agricultural machinery companies, agricultural certification research institutions in some counties, and the window of modern new villages with large-scale operations and large machinery. -Haranoya. This inspection focused on understanding the experiences and problems of Japan's comprehensive development of agricultural modernization, collected a large amount of information on the popularization of agricultural technology, service systems and expansion of operation scale to achieve agricultural modernization in my country. The article "Inspecting Japanese Agriculture and Drawing Lessons" was published by the Jiangsu Province Agricultural Society. Exploring Agricultural Modernization in Taihu Area From the late 1970s to the early 1980s, Yang Lijiong was mainly engaged in the research of agricultural modernization in my country. He presided over the national key research project of "Jiangsu Taihu Region Agricultural Modernization Comprehensive Scientific Experimental Base" and established the Agricultural Modernization Research Institute of Jiangsu Province Academy of Agricultural Sciences, and served as the director. During this period, he also served as the leader of the "Research on High-yield Technology Development of Rice Continuous in Jiangsu Province" under the organization and leadership of the Provincial Science and Technology Commission. This work is to set up 24 100-acre high-yield test strips according to different ecological agricultural divisions to study the technical system of high yield, low consumption, and gain of the main varieties, and promote large-scale increase in production through points and areas. In the past three years, the cumulative experimental and demonstration area was 6,744.5 acres, with an average yield of 547.2 kilograms per mu, an increase of 19.57% compared with the control field, a cost reduction of 7.85%, and a net income per mu increased by 35.96%. In the past three years, the cumulative expansion and promotion area has reached 15.988 million acres, increasing the output of rice by more than 1 billion kilograms. The technical specifications for inter-species cultivation of several leading varieties in the Taihu Lake area have been initially clarified, and new enlightenment has been provided for the understanding of the laws of high-yield formation under different ecological conditions. This collective development research won the second prize for technical improvement in 1985 by the province. Regarding the issue of my country's agricultural modernization, Yang Lijiong and his colleagues emphasized that goals should be determined based on national conditions and regional characteristics, and ways and methods to achieve them should be explored, and foreign practices should not be copied. He organized more than 30 scientific and technological personnel to go deep into the Taihu Lake area to conduct investigations and research and listen to opinions from all parties. Then, under the guidance of relevant leaders of the Jiangsu Province Academy of Agricultural Sciences, he proposed agricultural resource zoning, land planning and farmland construction, agricultural mechanization, production technology systems such as agriculture, animal husbandry, fishery, silkworm and fruit, improved seed breeding and promotion system, as well as 25 small topics in eight aspects including environmental protection and energy, social team industrialization, and agricultural economy, which were newly established at that time. Research tasks of the Agricultural Modernization Research Institute. It has also established two base counties, Wuxi and Wuxian, and two comprehensive scientific experimental bases, Yuexi and Dongting (such as four modern production bases for diversified operations of fishery, poultry, silkworm and fruit), forming a research network. The institute organized collaborative research involving more than 20 units and 200 scientific and technological personnel from provincial, municipal and county scientific research, production, administrative departments and colleges to discuss the goals and conditions of agricultural modernization in economically developed areas, typical of Taihu Lake area., ways and measures. This is the first time in China to organize and collaborate in a planned manner to explore the path of developing agricultural modernization in southern my country. In the late 1970s, the Taihu Lake area mainly implemented the "double and triple cropping" system. Not only was the farming season tight, but also the labor intensity was very high. Farmers are eager to change the situation of "facing the loess and facing the sky" for thousands of years, and require the gradual realization of mechanization of production to reduce labor intensity and improve operating efficiency. Under the initiative of Yang Lijiong, agricultural technology and agricultural machinery personnel carried out collaborative research, using a 1000-acre brigade (village) as a typical unit to conduct selection and supporting research on various agricultural machinery, and combined with other contents to explore how to improve labor productivity and machinery utilization rate. After several years of hard work, the expected results have been achieved. Yang Lijiong believes that cultivation science is a comprehensive science. Cultivation cannot be studied just for cultivation. Only comprehensive research combined with agricultural machinery, farming, soil fertilizer, meteorology, ecology, agricultural economics and other majors can it have vitality. In his article "Creating a New Situation in Crop Cultivation", he mentioned that "we must establish the view that crop cultivation is a subsystem of the large agricultural system" and strive to achieve regionalization, standardization and standardization. He believes that in modern agricultural production, it is not enough to simply put forward the slogan of "agriculture is suitable for agriculture, forest is suitable for forests, and combination of agriculture, forestry and animal husbandry". We must propose an optimal plan suitable for the local area that includes both qualitative and quantitative analysis. Only then can we scientifically direct production. Therefore, when carrying out the research on the above-mentioned topics of the institute, they all urged relevant disciplines to cooperate with each other to explore the laws of high-yield crops from different perspectives. In terms of research methods, he advocated that comprehensive research does not mean abandoning individual research. He believes that the former is developing towards a holistic approach, while the latter is deepening into the micro world, and the two complement each other. In terms of topic research, he insisted on combining "soft" topics and "hard" topics with appropriate proportions. There must be "software" to provide leaders at all levels with agricultural development strategies and development trend predictions to avoid policy and strategy mistakes, and there must also be "hardware" that can directly produce social and economic benefits. The Taihu Lake area in Jiangsu is famous for its intensive farming, but the cultivated land has dropped sharply, the population has increased sharply, and the rise of township enterprises have brought about serious problems such as energy shortage, transfer of agricultural labor, and environmental pollution. Yang Lijiong believes that in the future, it is impossible for the Taihu Lake area to implement labor-and resource-intensive agriculture as in the past, but should be replaced by technology-intensive agriculture. He asked scientific and technological personnel to focus on research on less than 1 acre of cultivated land per capita to create agricultural productivity that can best tap the potential of land resources, bear a large population load, and achieve sustained high yields. This is agricultural modernization that suits my country's national conditions. He has been stationed and running for many years, not only taking care of the inside of the institute, but also considering the outside; he has to organize the implementation of the project and cooperate fully with the cooperating units. He went from mastering the research direction to working progress; From the formation of the results to the promotion and application, even the research report must be revised word for word. It can be said that Yang Lijiong's painstaking efforts have been devoted to the development of agricultural modernization in Taihu region and the achievements of the Agricultural Modernization Research Institute. Under the careful guidance of Yang Lijiong, the Agricultural Modernization Office of the Academy of Agricultural Sciences of Jiangsu Province has gradually grown and developed. It has completed more than 90 research projects and won more than 20 awards, including 2 second prizes for National Science and Technology Progress Awards, 2 second prizes for Ministry Science and Technology Progress Awards, 3 third prizes, and 5 provincial and municipal scientific and technological progress awards. The direct economic benefits generated by the promotion and application of scientific research results during the "Sixth Five-Year Plan" period alone totaled 630 million yuan. As an entity adapted to carry out comprehensive research on agricultural modernization in economically developed areas in southern my country, it has established collaborative relationships with nearly ten countries in the world and organized dozens of academic exchanges involving domestic and foreign experts and scholars. In October 1989, the Institute of Agricultural Modernization of Jiangsu Province Academy of Agricultural Sciences held a celebration of the 10th anniversary of its establishment. People have not forgotten the old director who has made great contributions to this institute and has now retired. They specially invited him to sit at the top of the rostrum to congratulate and report to him. Yang Lijiong pointed out in his speech: "It will take some time for my country to realize agricultural modernization, and it will also require the hard efforts of all of you here." Lao Yang's words were sincere. May the latter carry forward the past and forge ahead into the future, work hard, and make new contributions to the realization of my country's agricultural modernization. Yang Lijiong died in Nanjing on July 6, 1992 due to illness at the age of 80.