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研究结果表明 ,对于种植密度为 375 0 0株 /h 左右的棉花群体 :(a)保留植株下部的叶枝 ,具有增加单株现蕾数量的作用 ,单株保留叶枝数与单株现蕾总数之间呈正相关关系 (r =0 970 6 ) ;(b)单株留叶枝数与单株蕾铃脱落之间也呈正相关关系 (r=0 96 0 4)。可见 ,保留棉花叶枝带来促进现蕾数量增加的作用能被脱落率的增加抵消。不同留叶枝数的研究结果证明 ,棉花单株留叶枝数在 1～ 2条时 ,适当控制水肥措施 ,有利于抓住叶枝上的早期花蕾 ,促进单株现蕾数增加 ,也可避免过多叶枝引起的蕾铃脱落。
The results showed that cotton plantlets with a density of 375 000 plants / h were planted: (a) Retaining the leaf branches in the lower part of the plants had the effect of increasing the number of buds per plant, the number of leaves retained per plant and the total number of buds per plant (R = 0 970 6). (B) There was also a positive correlation between the number of leaves retained per plant and the shedding of individual buds (r = 0 96 0 4). Can be seen, the retention of cotton leaf branches to promote the role of increased budding can be offset by increased shedding rate. The results of the study on the number of leaves retained showed that when the number of leaf branches per plant is between 1 and 2, proper measures of water and fertilizers are helpful to seize the early buds on leaf branches and promote the increase of the number of buds per plant and avoid too much Leaf bud caused by the fall off.