宁南地区土壤营养障碍性分析

Soil Nutrition Barriers in the Southern Area of Ningxia

宁南地区土壤的风化发育程度较低，腐殖化微弱，淋溶强度小，侵蚀强烈，导致土壤有机质贫乏，质地较砂，保水保肥能力低，营养元素的有效性差。调查分析表明，土壤钾素营养丰富，氮、磷素含量低，对植物供应能力明显不足；微量元素除铜外。

The soil in the southern area of Ningxia has the characteristics of low weathering development, poor humification, weak leaching strength, and serious erosion, which leads the soil to have few organic matters, sandy texture, weak capacity in keeping water and fertilizer, and low nutrition element efficiency. The investigation shows that in this area there is an abundant content of potassium in the soil which can meet the need for plant growth, and low nitrogen and phosphorus contents which apparently cannot meet the need of plants, and also that the trace elements are seriously deficient except copper.