In October,84-year-old Yuan Longping received a group of experts in his rice field.With his thin build,plain blue-striped shirt,wrinkled face darkened by sun,and his Hunan dialect,Yuan could easily be mistaken for an ...In October,84-year-old Yuan Longping received a group of experts in his rice field.With his thin build,plain blue-striped shirt,wrinkled face darkened by sun,and his Hunan dialect,Yuan could easily be mistaken for an ordinary rice farmer.He is,in fact,one of China’s most accomplished scientists.A road,a high-tech development zone,a college,a publicly-traded展开更多
Rational close planting is an economical and effective measure to increase crop yield.In order to explore the suitable planting density of major maize cultivars in northern Anhui,we studied the grain number per spike ...Rational close planting is an economical and effective measure to increase crop yield.In order to explore the suitable planting density of major maize cultivars in northern Anhui,we studied the grain number per spike and 1 000-grain weight of three major maize cultivars,including ‘Zhengdan958＇,‘Ludan981＇ and ‘Longping206＇.The effects of planting density on yield and correlated characters were further analyzed.The study was performed at agricultural experiment farms of Suzhou Academy of Agricultural Sciences.The planting density was set from 7 500 to 30 000 plants/hm^2 with an interval of 7 500 plants/hm^2.Water and fertilizer were supplied sufficiently.High yield cultivation method was also used.Based on the high yield achieved,we analyzed the relationship between crop yield and correlated characters.The results showed that,the planting density had the parabolic relation with the yield of ‘Zhengdan958＇ and ‘Longping206＇.The most suitable density of compact type cultivar ‘Zhengdan 958＇ was 73 300 plants/hm^2.The most suitable density of semi-compact type cultivar ‘Longping 206＇ was 68 600 plants/hm^2.The most suitable density of flat type cultivar ‘Ludan981＇ was 45 000-52 500 plants/hm^2.The planting density of compact type cultivar could be increased appropriately.However,it was negatively related to the grain number per spike and 1 000-grain weight if the planting density is out of range.So,Ludan981 should be planted in low density to avoid risk.展开更多
Hybrid rice technology in China was developed in three stages. From the 1950s onwards, hybrid rice researchers, as typified by Yuan Longping, sought out a feasible approach to utilizing rice heterosis, and developed t...Hybrid rice technology in China was developed in three stages. From the 1950s onwards, hybrid rice researchers, as typified by Yuan Longping, sought out a feasible approach to utilizing rice heterosis, and developed the three-line indica hybrid rice. Led by the government, the hybrid rice technology R&D teams adopted the research mode of "large-scale cooperation"(大协作), and accomplished technical innovations in the three-line system, selective breeding, and production of hybrid seeds. In the ensuing decade, Yuan Longping and others discovered the photo-thermo sensitive genic male sterility(PTGMS) of rice and developed PTGMS lines, turning highly advantageous two-line rice breeding from scientific vision into reality. Over the next twenty-five years, China’s super-rice breeding program integrated the conventional, three-line, and two-line breeding methods with modern molecular biotechnology methods. For nearly half a century, China made outstanding attainments in acquiring quality strains that yielded enormous economic and social benefits. Throughout this process, factors such as urgent social demand for increased grain production and scientific research cooperation provided significant impetus.展开更多
Agricultural scientist Yuan Longping, known as the father of hybrid rice, was awarded the Medal of the Republic on September 29, along with seven other prominent figures for their outstanding contributions to the cons...Agricultural scientist Yuan Longping, known as the father of hybrid rice, was awarded the Medal of the Republic on September 29, along with seven other prominent figures for their outstanding contributions to the construction and development of the People's Republic of China.展开更多
文摘In October,84-year-old Yuan Longping received a group of experts in his rice field.With his thin build,plain blue-striped shirt,wrinkled face darkened by sun,and his Hunan dialect,Yuan could easily be mistaken for an ordinary rice farmer.He is,in fact,one of China’s most accomplished scientists.A road,a high-tech development zone,a college,a publicly-traded
基金Supported by Suzhou Experiment Station of National Maize Industry TechnologySystem(CARS-02-51)Anhui Key Scientific and Technological Project(12010302062)+1 种基金Anhui Strategic Emerging Industry Project(11010301026)Transformation Fund forAnhui Agricultural Science and Technology Achievements(2013-07)~~
文摘Rational close planting is an economical and effective measure to increase crop yield.In order to explore the suitable planting density of major maize cultivars in northern Anhui,we studied the grain number per spike and 1 000-grain weight of three major maize cultivars,including ‘Zhengdan958＇,‘Ludan981＇ and ‘Longping206＇.The effects of planting density on yield and correlated characters were further analyzed.The study was performed at agricultural experiment farms of Suzhou Academy of Agricultural Sciences.The planting density was set from 7 500 to 30 000 plants/hm^2 with an interval of 7 500 plants/hm^2.Water and fertilizer were supplied sufficiently.High yield cultivation method was also used.Based on the high yield achieved,we analyzed the relationship between crop yield and correlated characters.The results showed that,the planting density had the parabolic relation with the yield of ‘Zhengdan958＇ and ‘Longping206＇.The most suitable density of compact type cultivar ‘Zhengdan 958＇ was 73 300 plants/hm^2.The most suitable density of semi-compact type cultivar ‘Longping 206＇ was 68 600 plants/hm^2.The most suitable density of flat type cultivar ‘Ludan981＇ was 45 000-52 500 plants/hm^2.The planting density of compact type cultivar could be increased appropriately.However,it was negatively related to the grain number per spike and 1 000-grain weight if the planting density is out of range.So,Ludan981 should be planted in low density to avoid risk.
文摘Hybrid rice technology in China was developed in three stages. From the 1950s onwards, hybrid rice researchers, as typified by Yuan Longping, sought out a feasible approach to utilizing rice heterosis, and developed the three-line indica hybrid rice. Led by the government, the hybrid rice technology R&D teams adopted the research mode of "large-scale cooperation"(大协作), and accomplished technical innovations in the three-line system, selective breeding, and production of hybrid seeds. In the ensuing decade, Yuan Longping and others discovered the photo-thermo sensitive genic male sterility(PTGMS) of rice and developed PTGMS lines, turning highly advantageous two-line rice breeding from scientific vision into reality. Over the next twenty-five years, China’s super-rice breeding program integrated the conventional, three-line, and two-line breeding methods with modern molecular biotechnology methods. For nearly half a century, China made outstanding attainments in acquiring quality strains that yielded enormous economic and social benefits. Throughout this process, factors such as urgent social demand for increased grain production and scientific research cooperation provided significant impetus.
文摘Agricultural scientist Yuan Longping, known as the father of hybrid rice, was awarded the Medal of the Republic on September 29, along with seven other prominent figures for their outstanding contributions to the construction and development of the People's Republic of China.
