1.乙烯利的催熟原理及效果棉铃开絮是一种复杂的生理转化过程。开絮前10天,棉铃内乙烯含量急剧增加,开絮前1～2天,乙烯含量达到高峰。因此,棉铃内乙烯达到一定含量是棉花开絮的不可缺少的条件。植株生育正常的棉田,在9月中旬前,可以自身产生乙烯,使棉铃完成开絮前的生理转化,9月中、下旬可以自然开絮。但是部分晚熟棉田,由于棉铃发育日数不足,加上9月下旬平均气温低于20℃,棉株体内产生的乙烯很少,不能 1. Ethephon ripening principle and effect Cotton boll opening is a complex physiological transformation process. 10 days before opening floc, the boll content of ethylene increased sharply, open 1 to 2 days before floc opening, the ethylene content reached its peak. Therefore, cotton boll to achieve a certain content of ethylene is an indispensable cotton open conditions. Plant fertility normal cotton fields, before mid-September, can produce ethylene itself, so cotton boll to complete the physical transformation before the open flocculation, in mid-September, can be opened naturally. However, in some late-maturing cotton fields, due to the lack of boll development days and the average temperature in late September of less than 20 ° C, there is very little ethylene produced in cotton plants.