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近几年来,玉米单产的不断提高与增施肥料、合理灌水等有关,但选用耐密植的优良杂交种起了重要作用。田间玉米杂交种群体密度增大,群体内个体问的发育均衡性对产量的影响应引起高度重视。一、玉米杂种群体均衡发育的重要性杂种玉米群体发育均衡性指群体内株间发育相同程度、性状整齐一致程度。玉米生产田常因种子质量不好、整地质量差、播期不适、播种质量差,致使出苗不整齐,或因
In recent years, the continuous improvement of corn yield is related to the increase of fertilizers, rational irrigation and so on, but the selection of good hybrids with close tolerance plays an important role. The population density of field maize hybrids increased, and the developmental balance of individuals in the population should pay more attention to the yield. First, the importance of the balanced development of maize hybrid population The development of hybrid maize population balance refers to the development of the same strain within the group, the characters neatly consistent. Corn production often due to poor seed quality, site preparation poor quality, sowing date, sowing poor quality, resulting in irregular emergence, or due to