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桂糖17号和新台糖22号新植蔗分蘖初期,用100mg/L乙烯利喷施叶面,促进了宿根蔗出苗并提高了苗期的叶绿素含量。继续用100mg/L乙烯利分别在宿根蔗苗期、伸长盛期喷施叶面,结果显示:苗期喷施乙烯利促进了宿根蔗的生长,改善了宿根蔗的经济性状,增加了甘蔗产量;两个时期处理都提高了宿根蔗的有效茎数、成茎率和甘蔗品质,但伸长盛期喷施乙烯利,甘蔗的茎长、茎径、单茎重比对照低。在相对干旱时期,乙烯利处理的叶片相对含水量、束缚水/自由水比值都高于对照,而丙二醛含量、组织浸提液可溶性糖含量、电导率都低于对照,说明乙烯利处理提高了宿根蔗的抗旱性。
In the early stage of tillering of new sugarcane with Guitang 17 and Xintaandu 22, spraying leaves with 100 mg / L ethephon promoted the emergence of sugarcane and increased chlorophyll content at seedling stage. The results showed that the spraying of ethephon at the seedling stage promoted the growth of ratoon sugarcane, improved the economic traits of ratoon sugarcane, and increased the sugar cane Yield; The treatment of both periods increased the effective stalks, stalks and sugar cane quality of ratoon sugarcane, but ethephon sprayed at the elongation stage. The stem length, stem diameter and single stalk weight of sugarcane were lower than the control. The relative water content and the bound water / free water ratio of ethephon were higher than those of the control at relatively arid period, while the content of malondialdehyde, the content of soluble sugar and the conductivity of the tissue extract were lower than those of the control Improve the drought resistance of ratoon sugarcane.