推广棉花“开心”技术能高产我国多年来，棉花生产提倡过窄垄密植早打顶，也主张过宽垄稀植不整株，都是在主茎果株结铃上下功夫，结果棉花产量低而不稳，很少在大而积棉田上突破亩产皮棉１００公斤，河北省沧州市农作科学院副研究员刘永平等棉花科研人员，在地处北纬３８... Promote cotton “happy” technology can produce high yield China over the years, cotton production has advocated a narrow ridge of densely planted early morning, also advocate a wide ridge sparsely planted whole plant, are in the main stem and fruit plant bell work hard, the result of low cotton yield Instability, seldom breakthrough in the large and plot cotton field lint per mu 100 kg, Cangzhou City, Hebei Province Academy of Agricultural Sciences researcher Liu Yongping and other cotton researchers, located in latitude 38 ...