滴灌对宿根蔗叶片养分以及甘蔗产量、品质的影响

为了探明桂糖系列甘蔗新品种对水分供给的生长效应，在宿根蔗上进行滴灌试验袁研究滴灌对各个品种叶片营养、甘蔗产量和品质的影响。结果表明：（1）在甘蔗伸长期叶片氮、磷、钾营养元素含量方面，滴灌处理与非灌水处理间无明显差异。（2）滴灌对甘蔗产量有明显的促进作用，但不同品种的增产幅度不一，其中以GT33增产最显著，增产达26.1%；增产幅度在20%以上的还有GT31、GT32、GT34。（3）滴灌还可以提高甘蔗品质，使甘蔗蔗糖分含量提高0.2~0.7个百分点，蔗汁重力纯度提高1%~3%。

Effect of leaf nutrition, cane yield and quality of ratoon sugarcane under drip irrigation condition

An experiment was set up to investigate the growth effect of ratoon cane under drip irrigation conditions.Treatments were processed on one year ratoon canes by using series new GuiTang sugarcane varieties, leaf nutrition, cane yield and quantity have been determined. The results indicated that: 1) there was no significant difference in leaf nitrogen,phosphorus, potassium content between drip irrigation and control at the elongation growth stage. 2) Drip irrigation could increase the cane yield by different percentage of different varieties, GT33 increased by 26.1% as compared to control, the yield of GT31, GT32 and GT34 was also increased by above 20%. 3) Besides, cane quality could be improved under drip irrigation, such as sucrose content was increased by 0.2%-0.7%, and juice gravity purity increased by 1%-3% when contrast to control.