如何促进棉花早熟是我国许多棉区的一个共同性课题。七十年代以来,我国一些单位研究利用植物生长调节剂乙烯利(2-氯乙基膦酸)进行棉花催熟,到1980年,全国约有15个省市示范推广,达150万亩以上,绝大多数收到了早熟、增产和改善纤维品质的效果。一般可使棉铃提早吐絮7—10天,霜前花增加20%以上,是解决棉花晚熟问题的一项较有效的措施。 How to promote cotton precocity is a common issue in many cotton areas in our country. Since the 1970s, some units in China have studied the ripening of cotton with ethephon (2-chloroethylphosphonic acid), a plant growth regulator. By 1980, about 15 provinces and cities nationwide had demonstrated and popularized more than 1.5 million mu, The vast majority received the effect of precocious, increased yield and improved fiber quality. In general, cotton bolls are allowed to flocculate for 7-10 days in advance and the flower before frost is increased by more than 20%. Therefore, it is a more effective measure to solve the problem of late maturity of cotton.