在分蘖期用１００ｍｇＬ－１和４００ｍｇＬ－１浓度乙烯利对早熟、中迟熟两个熟性不同的甘蔗品种进行叶面喷施，喷后２～１０周内对新出叶的观测表明：①乙烯利对叶的长、宽有一定的抑制作用，１００ｍｇＬ－１浓度处理的抑制较轻。②对叶片维管束、叶肉细胞的发育分化起着深刻的影响，１００ｍｇＬ－１浓度处理对维管束和叶肉细胞的生长有所抑制，但却促进了其形态分化 In the tillering stage with 100mgL-1 and 400mgL-1 concentration of ethephon on early maturity, late maturity of two different varieties of sugar cane leaf spray, spray 2 to 10 weeks after the new leaves of the observation showed that: ① Ethephon has certain inhibitory effects on the length and width of leaves, and the treatment with 100 mg L-1 has less inhibition. ② The vascular bundles and mesophyll cells played a profound role in the development and differentiation of leaves. The treatment with 100 mg L-1 inhibited the growth of vascular bundles and mesophyll cells, but promoted the morphological differentiation