大家都知道,减少空秕的最终目的,是提高产量。生产中不难发现这样的事实,由于肥料不足,空秕虽少,但穗数不够,穗粒数少,不能高产。反之,施肥(特别是分蘖肥)过多,使营养生长期延长,抽穗期推迟,增加了遭受低温袭击的 As we all know, the ultimate goal of reducing vacancies is to increase production. Production is not difficult to find such a fact, due to lack of fertilizer, Kong empty though small, but the spike is not enough, fewer grains per spike, can not be high yield. On the contrary, fertilization (especially tillering fertilizer) is too much, so that the vegetative growth stage, delayed heading, an increase of low-temperature attack