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采用三因素五水平二次正交旋转组合设计,探讨氮、磷、钾配施对红小豆产量的影响,同时建立氮、磷、钾用量与红小豆产量关系的肥料效应函数模型,以确定本区域内红小豆的最佳施肥方案。结果表明:三因素对红小豆产量影响的大小顺序为磷肥>氮肥>钾肥,通过方程模拟寻优得出,红小豆单产大于2 050 kg·hm-2的氮、磷、钾优化组合方案为:N 68.9~85.3 kg·hm-2,P2O85.5~102.4 kg·hm-2,K2O 46.3~64.0 kg·hm-2,其比例为N∶P2O5∶K2O=1∶1.22∶0.72。
The effects of nitrogen, phosphorus and potassium fertilizers on the yield of adzuki bean were investigated by the combination of quadratic orthogonal rotation of three factors and five levels. The fertilizer effect function model was established to determine the relationship between nitrogen, phosphorus and potassium contents and adzuki bean yield. The best red bean in the region fertilization program. The results showed that the order of the three factors affecting the yield of red adzuki bean was phosphate fertilizer> nitrogen fertilizer> potassium fertilizer. Through optimization of the equation simulation, it was concluded that the optimum combination plan of nitrogen, phosphorus and potassium of red adzuki bean with a yield of more than 2 050 kg · hm- N 68.9-85.3 kg · hm-2, P2O85.5-102.4 kg · hm-2, and K2O 46.3-64.0 kg · hm-2 in a ratio of N: P2O5: K2O = 1: 1.22: 0.72.