陕北山旱地枣园平衡施肥技术的研究

Stndy on the techniques of Balance fertilization of Chinese date(Zizyphus jujuba) Plantntion in the upland of the Northern Region Shanxi

本文以土壤———枣树营养元素平衡为理论基础确定一定产量下的肥料合理配比和肥料效应的数学模型 ,通过L9(3 3)正交试验 ,以生产要素报酬率为理论依据 ,分析了一定产量下的肥料用量以及平衡施肥对红枣产量、水分利用效率的影响 ,论述了山旱地枣园平衡施肥的边际产量及其经济效益 ,提出了当地山旱地枣园经济合理施肥的计算模型和施肥方法以及合理施肥的有效条件。

The paper was theorteically based on the nutritive ekement equilibriun of soil and common jujube and decided the mathematica moedl of proper fertilizer ratio and use of fertilizer in quantitative yield.Through the L 9(3 3) orthogonal experiment,in theory based on the payment ratio of productive eldment,the aauthors analyzed the amount required of fertilizer in quantitative yield and balanced fertilization affeding on the common jujube yield and efficiency of water application,discussed the marginal yield and economic effect of balance fertilization the mountainous non-irrigated land Chinese date garden,supplied mathemtical computation model,dressing mathod and effective condition of proper fertilization in econmy using the native common jujube garden of mountainous nonirrgated land.