【摘要】 采用 三因素二 次饱和 Ｄ最 优设计方 案，对中 棚番茄氮 磷钾最 优化施肥 问题进行 了定 量研究，建 立了中棚 番茄产量 形成的 肥料反应 模式，利 用回归模 式对 最优 化施 肥量、各种 肥料 要素 的单独产量 的效应 规律及其 互作效应 进行了 探讨。更多还原

【Abstract】 The devices of 3 factors and 2 powers saturation D were adopted in this test. Using urea, calcium superphosphate and potassium chloyide, we had quantitative studies on the issues of the optimum applying fertilizer-N, P, K and set up reaction model of fertilizer for tomato yields in the middle sheds. The optimum feritilizer dose, reaction law for output to every kind of fertilizers and interaction law were probed into respectively according to regression model.更多还原