富镧稀土对甘蔗品种新台糖1号经济性状的效应

甘蔗品种新台糖１号在分蘖期叶面喷施４５ｍｇ／Ｌ富镧稀土,最终使小区有效茎数、茎长、茎径和单茎重都有所提高,获得了显著的增产效果;而且促进了甘蔗的蔗糖积累,使甘蔗蔗糖分和蔗汁重力纯度明显提高,还原糖分降低,明显提高了甘蔗品质。在供试的３个富镧稀土产品中,以９７％Ｌａ２Ｏ３的效果最好,其甘蔗产量和公顷含糖量显著高于对照（水）和生产上广泛使用的＂常乐＂稀土。

EFFECTS OF LANTHANUM-RICH RARE EARTH ON THE ECONOMIC CHARACTERS OF ROC 1,A SUGARCANE CULTIVAR

The treatments with 45 mg/L of lanthanum-rich rare earth sprayed on leaves of ROC 1,a sugarcane cultivar,resulted in more millable canes/plot,and higher stalk length,stalk diameter and weight/stalk,and cane yield.The treatments also promoted the sucrose accumulation in canes,producing a higher sucrose content in cane and higher gravity purity of juice but a lower reducing sugar content in juice.The product 97% La2O3 showed the best among the 3 lanthanum-rich rare earth products in the experiment,which produced a higher cane yield and higher sucrose tons/hectare than the control and"Chang-le"brand rare earth which is widely applied in sugarcane production.