【摘要】 影响紧凑型夏玉米产量的关键因素有 :地力不足 ,施肥单一 ;种植偏稀 ,群体密度达不到指标 ;只追施拔节、孕穗肥 ,不重视后期增施攻粒肥 ;收获偏早等几方面更多还原

【Abstract】 This paper analysed some factors affecting the production of dense type summer maize. Such as deficient fertilization, single fertilizing, sparsely planting, mass density short to index, only fertilizing at shooting stage and ear pregnant stage, not attach importance to fertilize supporting small grain, early harvest affecting improve production, etc.. This paper also breifly discussed how to improve production.更多还原