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江苏沿海棉区春温上升慢而不稳,秋温降得快,最佳结铃期较短(7月下旬到8月25日约35天左右),迟发和贪青迟熟常是影响最佳结铃期结铃与优质高产的突出矛盾。大面积生产上常有些棉田因雨水偏多或施肥不当而引起中后期旺长荫蔽,晚蕾滋生,贪青迟熟。1985～1987年,我们在中国农业科学院棉花所的指导下,开展了棉花化学封顶控晚蕾(简称化学封顶)的试验研究与示范推广,取得了较好效果。实
The spring cotton temperature in Jiangsu’s coastal cotton area increased slowly and instably, the autumn temperature dropped rapidly, and the optimum period of bolting was shorter (from late July to August 25, about 35 days). Late onset and late greyness often affected Optimum timing of bolting bell and high-yielding outstanding contradictions. Large areas of production often have some cotton fields due to excessive rain or improper fertilization and caused by the Mongolian long shade, late buds, greed green late. From 1985 to 1987, under the guidance of the Cotton Institute of Chinese Academy of Agricultural Sciences, we carried out experimental research and demonstration promotion of cotton chemical captive evening buds (Chemical Caps), and achieved good results. real