用BR 12 0 (油菜内酯素 )或BR 12 0与尿素、多菌灵配合对棉花进行根外 (叶面 )喷施试验 ,结果大多数处理的皮棉产量高于ck(不施用任何肥料和药剂 )特别是用BR 12 0与尿素配合施用时有明显的增产作用 ,其增产的主要原因是棉花的成铃率提高。施用BR 12 0等混配剂得当时对棉花的纤维品质也有一定的改良作用 ,如有的处理纤维增长 ,比强度提高 ,但对棉花枯黄萎病没有表现出防治效果 Root (foliar) spraying experiments were conducted on cotton with BR12 0 (brassinin) or BR12 0 in combination with urea and carbendazim. The results showed that the lint yield of most treatments was higher than that of ck (without applying any fertilizer and Pharmacy) Especially with BR 12 0 and urea with a significant increase in the role of the yield, the main reason for the increase in yield of cotton bolls increased. At the same time, the application of BR120 and other compounding agents could also improve the fiber quality of cotton at some time. If some treatments could increase the fiber and improve the specific strength, it did not show any control effect on the cotton wilt