棉叶和棉铃都能吸收乙烯利并很快释放出乙烯。棉叶吸收乙烯利后能在棉铃中释放乙烯,而棉铃吸收乙烯利后不能在棉叶中释放,只能在本身释放,释放高峰在处理后约2天和开裂前出现。对照只出现一个高峰,而且时间比处理的第二个高峰晚8天,这与乙烯利能促使棉铃提早7—10天吐絮的效果相吻合。不论处理与否,棉铃释放乙烯的数量都随气温的升高而增多。 Both cotton leaf and cotton boll can absorb ethephon and release ethylene soon. After the absorption of ethephon, the cotton leaves can release ethylene in the cotton boll, but the cotton boll can not be released in the cotton leaves after absorbing ethephon, and can only release on its own. The peak of the release appears about 2 days after the treatment and before cracking. Only one peak appeared in the control, and the time was eight days later than the second peak of treatment, which agrees well with the effect of ethephon to promote cotton bolls 7-10 days earlier. Whether treated or not, the amount of ethylene released by cotton bolls increases with temperature.