不同水肥供应对宿根甘蔗叶片矿质营养的影响

Effects of different rates of water supply and nitrogen fertilizer on mineral nutrients in leaves of sugarcane

以新台糖22号甘蔗为试验材料,采用裂区设计,研究甘蔗伸长期不同配比供水量和施氮水平对甘蔗吸收矿质营养氮、磷、钾效应的影响。结果表明,伸长期每公顷施氮量360kg、每旬供水量40.0m(3相当于每旬降雨量60mm)的高水中氮处理对甘蔗吸收氮素的效应最佳;每公顷施氮量540kg、每旬供水量40.0m(3相当于每旬降雨量60mm)的高水高氮处理对磷素的吸收效应最佳;氮与钾1∶1施用量配比的中氮处理对钾素的吸收效应最佳。

Sugarcane variety ROC 22 was used as material in this experiment to study the effects of different rates of water supply and nitrogen fertilizer on absorption of mineral nutrients N, P and K at elongation stage of sugarcane. The results indicated that 360 kg/hm^2 of nitrogen application and 40.0 m^3/ten-day （equal to rainfall amount of 60 mm/ten-day） of water supply had the best effects on nitrogen absorption in sugarcane, 540 kg/hm^2 of nitrogen application and 40.0 m^3/ ten-day （equal to rainfall amount of 60 mm/ten-day） of water supply had the best effects on phosphorus absorption in sugarcane, and 1：1 of application for N ： K had the best effect on potassium absorption in sugarcane.