在甘蔗分蘖期,用0(CK),100,200mg·L~(-1)3个浓度的乙烯利对中熟品种桂糖84/332、特早熟品种新台糖1号进行叶面喷施。结果表明:1.乙烯利处理后,甘蔗叶片和茎的生长表现出先受抑制后恢复的生长规律,浓度越大,受抑制程度越大。叶片生长受抑制的时间约为2～3个月,茎伸长生长受抑制的时间为15d 左右。2.乙烯利处理对甘蔗生长发育与产量的影响具有两面性;乙烯利在抑制甘蔗地上部分生长的同时促进地下蔗芽的萌发和生长;乙烯利处理使茎长有所下降,但能增加有效茎数。3.乙烯利处理对甘蔗产量、品质的影响因不同品种而异。 At the tillering stage of sugarcane, the middle maturity varieties Guitang 84/332 and the special precocious variety Xintai Tang 1 were sprayed with three concentrations of ethephon (0, 100, 200 mg · L -1) at the tillering stage. The results showed that: 1. After the ethephon treatment, the growth of sugarcane leaves and stems showed the first growth inhibition after recovery, the greater the concentration, the greater the degree of inhibition. Leaf growth inhibition time is about 2 to 3 months, stem elongation growth inhibition time of about 15d. Ethephon could promote the growth and development of underground sugarcane at the same time while inhibiting the growth of aboveground part of sugarcane; ethephon reduced the stem length but increased the effective stem number. The effects of ethephon treatment on the yield and quality of sugarcane vary with different varieties.