一.引言在谷类作物的生长发育过程中,最直接关联着我们收获的是它开花后籽粒形成期间的生理变化。这时候植株体内干物质的累积速度和分布情况,都必然影响收获量。因此,如何去调节营养生长和生殖生长,如何才能保证养分大量地集中到果实中去,是一个非常重要的问题。李森科院士(Т.Д.Лысенко)等对于棉花整枝的研究是这方 I. Introduction In the process of growth and development of cereal crops, the most directly related to our harvest is the physiological changes during grain formation after flowering. At this time, the accumulation rate and distribution of dry matter in plants will inevitably affect the amount of harvest. Therefore, how to regulate vegetative growth and reproductive growth, how to ensure that a large number of nutrients concentrated in the fruit to go, is a very important issue. The academician Lysenko (Т.Д.Лысенко) and other research on cotton pruning is this side