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一、基本情况前所果树农场建立于一九五三年,以栽植苹果树为主,现有果树20000亩,其中结果树13000亩,年总产量2500～2700万斤。土地为丘陵坡地,土质瘠薄,属于山区沙石土,有机质含量极少,仅占0.5～1.0%,全氮含量0.06%,全磷0.05%,钾极少,PH 值5～7.3之间。目前已有各种果树26万株,兴修了水利工程42处,蓄水量达238万立方米,修筑了水平梯田,经过三次深翻改土,园地土壤性质有了一定的变化,有机质增加到1.0%左右,土壤孔隙度增大,容重降低,肥力提高了。三要素的含量略有增加,全氮0.189%,
First, the basic situation Before the results of the tree farm was established in 1953 to planted apple trees, the existing 20000 acres of fruit trees, of which 13000 acres of trees, the annual output of 2500 to 2700 kg. The land is hilly slope with poor soil quality. It belongs to sandy soil in mountainous area with very little organic matter, accounting for only 0.5-1.0%, total nitrogen content 0.06%, total phosphorus 0.05%, very little potassium and pH 5-7. At present, there are 260,000 kinds of fruit trees, 42 water conservancy projects have been constructed, 2.38 million cubic meters of water have been built, and horizontal terraces have been built. After three times of deep soil improvement, the soil properties in the garden have been changed. Organic matter has been increased to About 1.0%, soil porosity increased, bulk density decreased, fertility increased. The three elements slightly increased the content of 0.189% of total nitrogen,