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研究采用二次饱和 D-最优设计 ,建立了夏谷产量与密度、磷、氮肥的回归数学模型。结果表明 :决策变量对产量的作用依次为氮肥 >密度 >磷肥。密度与磷肥、密度与氮肥均存在着互作效应。通过模拟选优 ,筛选出亩产 2 80 kg以上的措施组合 65套 ,2 50～ 2 80 kg的措施组合 593套 ,2 2 0～ 2 50 kg的措施组合 71套。经过对各因素的水平频率分布分析 ,得出了不同产量水平的最可靠措施因素投入量。经济效益最高的措施因素投入水平为 :密度 5.978万株 / mu,纯磷 3.565kg/ mu,纯氮 6.2 91kg/ mu,亩产量 2 79.0 6kg。
Based on the secondary saturation D-optimal design, the regression mathematic model of yield and density, phosphorus and nitrogen fertilizer was established. The results showed that the effect of decision variables on the yield was nitrogen fertilizer> density> phosphate fertilizer. Density and phosphate fertilizer, density and nitrogen fertilizer all exist interaction effects. Through simulation, we selected 65 sets of measures of more than 280 kg per mu, 593 sets of measures of 2 50 ~ 2 80 kg and 71 sets of measures of 220 ~ 250 kg. After analyzing the horizontal frequency distribution of each factor, the input of the most reliable measure factors at different output levels is obtained. The most economical factors for investment are: the density of 597800 plants / mu, the pure phosphorus of 3.565kg / mu, the pure nitrogen of 6.291kg / mu and the mu production of 2 79.0 6kg.