在不同肥力条件下 ,对杂交棉豫杂 35四个种植密度水平下的群体生产特点、产量构成及产量进行了试验研究 ,结果表明 :豫杂 35在中等以下地力条件下 ,密度不宜低于每公顷 3万株 ,在 3.75万～4.5万株较好 ;而中等以上肥力水平条件下 ,获得同等产量水平 ,种植密度弹性较大 ,每公顷 2 .2 5万～4.5万株 ,仍表现产量随密度增加而增加的趋势 ,尤其是霜前子棉产量随密度增加而增加的趋势更加明显。 Under different fertility conditions, the population characteristics, yield components and yield of hybrid cotton Yumza35 at four planting densities were studied. The results showed that the density of Yusan35 under moderate soil conditions should not be less than 30,000 hectares in 37,500 to 45,000 plants; while under medium fertility level, the same level of yield was obtained, and planting densities were relatively high, with 25,000 to 45,000 plants per hectare, still yielding The trend of increasing the density is increasing, especially the trend of the increase of the yield of cotton before frost with density increasing.