在棉花生殖生长阶段,由于棉铃数的增加涉及净同化物的分配,而使有效光合产物的竞争导致营养物质的供应紧张,所以在结铃季节,随着结铃数的增加而蕾铃脱落增多,一般脱落率在70％以上。尽管人们对其脱落的原因进行过很多研究,但在如何利用脱落规律,提高产量和结铃率这方面的报道较少。Mattews(1979年)研究指出,陆地棉蕾铃的自然脱落对邻近的蕾铃有重要的影响,即 In cotton reproductive growth stage, the increase of boll number involves the distribution of net assimilate, which leads to the tight supply of nutrients due to the competition of effective photosynthetic products. Therefore, during the boll season, the number of bolls increased with the increase of boll number , The general rate of loss in more than 70%. Although many studies have been conducted on the causes of its shedding, there are few reports on how to use shedding law and increase yield and boll rate. Research by Mattews (1979) points out that the natural detachment of upland cotton bolls has an important effect on the neighboring bolls, namely