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《Crops》 2011-06
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Effects of Chemical Regulation on Lodging and Yield Traits of Rice in Cold Region

Xiao Changliang1,Xie Baosheng1,Zhao Shu2,Shen Qiaomei1, Sun Guifang1,Zhao Zesong1,Du Haixiang3(1Institute of Rice Research,Heilongjiang land reclamation sciences,Jiamusi 154007,Heilongjiang;2Heilongjiang Agricultural Vocational and Technical College,Jiamusi 154007,Heilongjiang;3Bayan Meteorological Bureau,Harbin 151800,Heilongjiang,China)  
Effects of chemical regulation on lodging and yield at four chemical regulating levels were studied using "Kendao12" as materials.The results showed that the plant height was shortened,elongation of stem was restrained,the breaking-resistant strength of stem was increased,and bending moment and lodging index was decreased by chemical regulation.Compared with the control,chemical control effectively reduced the probability of the occurrence of rice lodging.The increase of panicle number harvested compensated negative effects of 1000-grain weight Since panicle number of rice in the cold region increased significantly.Seed setting rate had increasing tendency and rice yield increased significantly compared with the control under chemical regulation of 600g/hm2.The rice yield increased insignificantly at 900g/hm2 and 1200g/hm2 treatment level.At 1500g/hm2 treatment level,the rice yield decreased.
【CateGory Index】: S511
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