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通过田间试验,采用二次通用旋转组合设计的方法分析了有机肥与化肥配合施用的效果,得回归方程 y=540.78+22.15x_1+58.34x2+27.15x3+3.67x4-0.44x1x2+7.44x1x3+2.44x1x4+4.25x2x3-3.75x2x4-1.25x3x4-3.86x1~2-8.29x2~2-6.86x3~3-9.42x4~2,并可化简为(?)=540.78+22.15x1+58.34x2+27.15x3+7.44x1x3+4.25x2x3-3.86x~2-8.29x2~2-6.86x3~2-9.42x4~2;通过回归方程计算的理论产量与实际产量相吻合,回归方程复相关系数 R=0.9966,结果表明,在中等肥力黑土上,种植作物的高产因素主要由施用有机肥、氮肥、磷肥构成,有机肥与磷肥、氮肥与磷肥配合施用效果较好。在施 N20公斤/亩,P_2O_210公斤/亩,K_2O5公斤/亩左右,并配合施有机肥1吨/亩左右,此时玉米产量达到最高,经济效益也最大;最佳施肥量区域是亩施N12—20公斤,P_2O_57—10公斤,K_2O3—5公斤,有机肥1吨左右。
The effects of organic manure and chemical fertilizers were analyzed by field experiments and the method of quadratic universal rotation combination. The regression equation y = 540.78 + 22.15x_1 + 58.34x2 + 27.15x3 + 3.67x4-0.44x1x2 + 7.44x1x3 + 2.44 x1x4 + 4.25x2x3-3.75x2x4-1.25x3x4-3.86x1 ~ 2-8.29x2 ~ 2-6.86x3 ~ 3-9.42x4 ~ 2, and can be simplified as (?) = 540.78 + 22.15x1 + 58.34x2 + 27.15x3 + 7.44x1x3 + 4.25x2x3-3.86x ~ 2-8.29x2 ~ 2-6.86x3 ~ 2-9.42x4 ~ 2; The theoretical yield calculated by the regression equation is consistent with the actual yield, the complex correlation coefficient R = 0.9966 of the regression equation, the result The results showed that the high-yielding factors of planting crops in medium-fertility black soil were mainly composed of organic manure, nitrogen fertilizer and phosphate fertilizer. The combination of organic manure and phosphate fertilizer, nitrogen fertilizer and phosphate fertilizer had a good effect. In the application of N20 kg / mu, P_2O_210 kg / mu, K_2O5 kg / mu or so, and with the application of organic fertilizer 1 ton / mu or so, then the corn yield reached the highest economic benefits are also the best; -20 kg, P_2O_57-10 kg, K_2O_3-5 kg, organic fertilizer about 1 ton.