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我们1975—1976年试验证明,乙烯利能有效地解决棉花贪青晚熟问题,使棉花提前收获,相对地提高产量和等级。但过去处理方法是在9月25日至10月15日之间进行一次喷雾,由于本地区历年雨量多集中在9月上中旬,到9月下旬以后雨量已逐渐减少,因而在9月下旬至10月中旬喷洒乙烯利,只对晚桃有催熟效果,而未能解决9月上中旬因降雨而造成的大量烂铃。为了研究解决烂铃和催熟两方面的作用,我队从1976年开始,根据棉花生育特性及乙烯利作用规律,进行乙烯利分期分层处理试验,已获得初步的效果。
Our 1975-1976 test proved that ethephon can effectively solve the problem of greige and late maturity of cotton, so that cotton is harvested in advance and the yield and grade are relatively increased. However, in the past, the treatment was carried out between 25 September and 15 October. Since most of the rainfall in the region was concentrated in the upper middle of September and gradually decreased after the end of September, the rainfall in late September In mid-October, ethephon was sprayed and the ripening effect was only observed on the late peach trees. However, it failed to solve the problem caused by the rainfall in mid-September. In order to study the role of resolving both the bad bell and ripening, our team started the experiment of ethephon stratification treatment according to the characteristics of cotton reproduction and the action of ethephon from 1976, and obtained initial results.