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在1971年曾证明,棉花密度增加,下层成熟的果枝的铃数就有所减少,这是由于这个区域内产生果节的数量减少和蕾铃脱落的数量增加的结果。1973年也证明,发育铃的同化物的主要来源是由和它紧联的叶有关。在密度高到叶面积系数达4.5的情况时,下层叶猛烈脱落,可见其净同化率是较低的,对下层铃以部分来源的同化物总量被减少了,这个减少和蕾铃脱落是相关的。又证明在减少荫蔽后,从下层来的有效同化总量则是增加了,这是从上层叶转化而来的。这篇报告是对去掉部分叶面后,上层叶对下层铃的补偿程度的评价。
In 1971 it was demonstrated that there was a decrease in the number of bolls of lower fruiting branches as the density of cotton increased, as a result of the reduced number of fruit-bearing nodes and the increased number of falling-out of the buds in this area. It was also shown in 1973 that the major source of developmental assimilates was related to its tightly linked leaves. Under the conditions of high density and leaf area coefficient up to 4.5, the lower leaves fell off violently and the net assimilation rate was lower, and the total amount of assimilates from partial sources was reduced. related. Also, after shading is reduced, the total amount of effective assimilation from below is increased, which is transformed from the upper leaves. This report is an evaluation of how much the upper leaves compensate for lower bells after removing some of the leaves.