【摘要】 适当增加种植密度是提高鲜食玉米产量的重要途径之一,而倒伏和秃尖是限制鲜食玉米种植密度增加的主要因素之一。本试验以京科糯2000、都市丽人和玉美头601为材料,研究在一系列种植密度条件下玉米产量的变化。试验结果表明,这3个玉米品种随着种植密度增加,产量都有先增加后减少的趋势,当密度达到3600株/667 m2时,产量达到最高值,商品率也达到最佳状态。在此基础上再增加密度则减产,同时商品率降低。因此,综合考虑产量和商品率,这些品种推荐种植密度为3600株/667 m2。更多还原

【Abstract】 Appropriate increase of planting density is one of the important ways to raise the yield of food corn, but lodging and bare tip is a major constraint to limit the increase of planting density.In this experiment, Jingkenuo 2000, Dushiliren and Yumeitou 601 were used to investigate the variation of yield under different planting density. The results show that the yields of the three varieties increase first and then decrease with the increase of planting density. The yield hits the maximum and the commodity rate also reaches the optimum when the planting density is 3600 plants/667m2. But the yield will decline when the planting density exceeds 3600 plants/667m2. Considering of the yield and the commodity rate, 3600 plants/667m2should be recommended as the optimum panting density.更多还原