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构成产量的三要素中,在一般生产条件下,以收获穗数对产量影响最大,粒数与粒重次之。目前每亩穗数基本上可以通过合理密植达到要求,而粒数和粒重则不易控制,对产量有较大影响。粒数主要决定于肥水条件及前期气象条件,年际变化不如千粒重变化大,且粒数的改变一般由于引起千粒重的变化得到部分补偿。千粒重的形成主要受扬花后各种条件影
Among the three elements that make up the yield, under the general production conditions, the yield was affected most by the number of ears harvested, followed by the number of grains and grains. At present, the number of spikes per mu can basically be achieved through reasonable and close planting, while the number of grains and grain weight are not easy to control and have a great impact on the yield. The number of grains is mainly determined by the conditions of fertilizer and water and the pre-meteorological conditions. The annual variation is not as large as that of 1000-grain weight, and the change of grain number is partially compensated due to the change of 1000-grain weight. The formation of 1000-grain weight is mainly affected by various conditions after flowering