论文部分内容阅读
棉花对土壤中营养物质的需要,如所周知,是不平衡的,是随着植株整个茎叶的增大而增加的。但是,达到大约与开花同时的开始形成棉铃阶段后,经过一些时间,进入植株中的营养元素,就显著地降低了,并且当第一个园锥体的棉铃成长到30天的时候,变为最少的了。在这时可看到棉花大量的结实器官—蕾、花和子房的脱落。自第一个圆锥体棉铃开裂,进入植株的营养物质,重新开始增长,然而对于产量的形成是没有良好影响的。而且在一定的条件下(晚追肥),进入的营养物质,特别是氮素较多时,对产量的成熟可能产生不良的影响;因为这难免引起植株的再度“从长”,使早形成的棉铃的营养恶化。因此,这会延迟分布在植株外围部分的棉铃开裂;并且在早霜
Cotton’s need for nutrients in the soil, as we all know, is unbalanced and increases as plant stems and leaves grow larger. However, after reaching the stage of boll formation beginning approximately at the same time as the flowering, the number of nutrients entering the plant decreased significantly after some time, and when the boll of the first conifer rose to 30 days, it became The least At this time you can see a large number of cotton solid organs - buds, flowers and ovaries off. Since the first cone boll broke into the plant’s nutrients, it started to grow again, however, with no good effect on yield formation. And under certain conditions (late top dressing), the access to nutrients, especially nitrogen is more, the yield may have a negative impact on maturity; because it will inevitably lead to the plant again “from the long,” so that early formation of bolls The deterioration of nutrition. Therefore, this will delay the cotton boll spreading around the peripheral part of the plant; and in the early frost