杏子河源出靖边县大路沟,流经志丹、安塞汇入延河。流域总面积约2,229,150亩。是陕西旱农低产地区之一。30年来,流域治理面积占水土流失面积的24.8%,但水土流失未能有效的控制。为此,我们通过重点调查结合田间试验对该流域的土壤肥力,土地生产潜力进行分析,供流域治理和改善土壤条件参考。 Apricot Heyuan out of Jingbian Dalu ditch, flows through Zhidan, Ansai, import Yanhe. The total basin area of ​​about 2,229,150 acres. Shaanxi is one of the low-yield dry agriculture. Over the past 30 years, the area managed by the watershed has accounted for 24.8% of the total area of ​​soil and water loss, but soil erosion has not been effectively controlled. To this end, we analyzed the soil fertility and land productivity of the basin through key investigations and field experiments for reference of watershed management and improvement of soil conditions.