【摘要】 在冬小麦夏直播花生两熟制条件下 ,采用二次饱和 D—最优设计方法 ,建立全年氮肥用量及其分配比例与小麦、花生产量及效益的数学模型 ,探讨了全年肥料用量与分配比例两因素对小麦和花生的产量效应及全年总产效应 ,提出了小麦花生全年总产 >1 2 0 0 0 kg/hm2和全年效益 >2 3 0 0 0元 /hm2的施肥措施和方案。更多还原

【Abstract】 Mathematical models between the nitrogen fertilizer amount applied, distribution ratio and yields and benefits were established by the adoption of Square Saturation D optimized Design in wheat and peanut cropping system. The effects of nitrogen amount applied and distribution ratio in wheat and peanut on yield and benefit were discussed. Approaches of applying nitrogen were recommended for obtaining a total yield of wheat and peanut>12 000kg/hm 2 and benefit>23 000yuan/hm 2.更多还原