直播早稻高产群体结构探讨杨志根顾掌根沈明华俞正富（浙江省嘉兴市农科所３１４０１６）（浙江省嘉善县农林局３１４１００）直播稻省工省力、高产高效，易被广大农户所接受，种植面积逐年扩大，但栽培管理过程中，往往造成群体过大，成穗率低，草害严重或发生倒伏而影响... Direct Broadcasting High-yielding Population Structure of Early Rice Yang Zhigen, Gu Zaogan, Shen Minghua, Yu Zhengfu (Jiaxing Agricultural Science Institute, Zhejiang Province 314016) (Jiashan County Agriculture and Forestry Bureau, Zhejiang Province 314100) Direct seeding rice is labor-saving, high yield and high efficiency, easy to be accepted by farmers. It has been expanding year by year, but in the process of cultivation and management, it tends to cause overpopulation, low earning percentage, severe or severe grass damage, and ...