应用综合指数评价模型，对正宁县60个苹果园土壤进行土壤肥力综合评价。结果表明，土壤钾素营养充足，有机质、有效Fe和有效Zn是影响土壤肥力水平的限制性因子，施肥时应重视有机质、有效Fe和有效Zn的投入。土壤肥力质量指数为0.5～0.6，土壤质量总体处于中等水平。

Taking 60 apple orchard of Zhengning as a case， the limiting soil fertility factors of apple orchard are evaluated by using comprehensive index evaluation model. The result shows that the organic matter， available Fe and available Zn are the soil fertility factors limiting the level of soil fertility， Fertilization should pay attention to them. The soil fertility quality indices being 0.5~0.6， the total quality of soil at the level of basically well.

S661.1

庆阳市重大科技专项“庆阳苹果提质增效关键技术研究集成与示范推广”(ZX2014-01)部分内容