要提高棉花的光能利用率,就是要使棉花的群体结构和单株形态结构彼此协调,通过试验,就此问题提出以下看法: 1.由于光与铃的分布是一致的,所以,要以增铃的方式来提高产量,就要改善群体的透光条件,增加群体的相对光强。这里,我们对棉花提出“二层楼”的群体结构。所谓“二层楼”,就是在大田生产条件下,采用适当的高低两种密度行相间种植,然后,采用高密度早打顶,低密度迟打顶的措施,人为地造 To improve the utilization of light energy of cotton, it is to make the population structure of cotton and single plant morphological structure coordinated with each other, through the test, the following observations on this issue: 1. Since the distribution of light and bell are consistent, so to increase Ring way to increase production, it is necessary to improve the group of light conditions, increase the relative intensity of the group. Here, we propose a “two-story” group structure for cotton. The so-called “two-storey” is the production of the conditions in the field, with the appropriate level of two kinds of planting lines and white, and then using high-density early topping, late-slowing low-density measures, artificial