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试验结果经数学处理后建立的回归方为程 =53.1+4.7146N+4.6202P-0.2098N~2-0.2944P~2。根据此方程认为豫东潮土区棉花施肥方案应该是:1)在与供试条件类似地区内,目前生产水平下一般可暂不施用钾肥。2)氮、磷最高产量施用量为亩施N11.2kg,P_2O_57.9kg.N:P_2O_5=1:0.70。3)氮、磷经济最佳施用量为亩施N9.8kg.P_2O_56.7kg,最佳配比N:P_2O_5=1:0.68。4)最佳配比线方程为0.71P-0.59N+1.06=0,在提高产量时,为获得最大利润所施氮磷之比应满足此方程。
The results of the test after the establishment of the mathematical formula for the regression equation = 53.1 +4.7146N +4.6202P-0.2098N ~ 2-0.2944P ~ 2. According to this equation, it is considered that the cotton fertilization program in the tidal zone of eastern Henan should be: 1) In the area similar to the test conditions, potassium fertilizer is generally not applied at the current production level. 2) The highest N and P application rates were N11.2kg and P_2O_57.9kg.N: P_2O_5 = 1: 0.70.3, respectively. The optimal economic application rates of N and P were N9.8kg.P_2O_56.7kg Good ratio N: P_2O_5 = 1: 0.68.4) The optimal ratio equation is 0.71P-0.59N + 1.06 = 0, in order to increase the yield, the ratio of nitrogen and phosphorus applied to maximize the profit should satisfy this equation.