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采用正交试验的方法,研究了豫西褐土区旱地甘薯氮、磷、钾养分的最佳配比。结果表明,不同氮、磷、钾配比组合产量差异较大,其中,以N∶P∶K为1∶0.4∶3.2为最优配比,与生产上常用的不同氮、磷、钾配比肥料相比,重施钾肥增产效果明显。
The optimum proportion of nitrogen, phosphorus and potassium of sweet potato in dryland in the west of Henan province was studied by orthogonal test. The results showed that the yield of different combinations of N, P and K was quite different. Among them, N: P: K was the best ratio of 1: 0.4: 3.2, which was different from the common N, P and K ratios Fertilizer, re-applied potassium yield significantly.