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提高旱地甘蔗氮肥利用率的施肥技术研究结果表明,在施用适量氮肥及配施磷钾肥条件下,用差数法测得旱地甘蔗尿素N 当季利用率为36 .6 % ,增产率为47 .2 % ,每公斤N 增产蔗茎82 .6kg 。单质氮、磷、钾肥料经加工造粒制成包膜专用肥料,其尿素N 当季利用率为43 .4 % ,比单施尿素的利用率提高14 .1 个百分点,尿素综合肥效提高68 .2 % ;与施用单质氮、磷、钾肥料相比,尿素N 利用率提高6 .8 个百分点,尿素综合肥效提高18 .6 % 。
Fertilization techniques for improving nitrogen use efficiency of sugarcane in dry land showed that under the conditions of application of adequate amount of nitrogen fertilizer and application of P and K fertilizers, the utilization rate of urea N in dryland sugarcane was 36.6% and the yield was 47% by using the difference method. 2%, yield of cane per kilogram of N 82.66kg. Nitrogen, phosphorus and potassium fertilizers made of coated granulation fertilizer, the urea N seasonal utilization was 43.4%, than the single use of urea increased by 14.1%, urea fertilizer efficiency increased by 68 .2%. Compared with the application of nitrogen, phosphorus and potassium fertilizers, the utilization of urea N increased by 6.8% and that of urea increased by 18.6%.