对甘肃省8个农田土壤地下淋溶监测点淋溶水中氮磷含量进行了测定分析，初步得出了甘肃省农田土壤地下淋溶氮、磷流失系数，总氮流失系数为0.19%～153.3%，总磷流失系数为0.0011%～0.32% 。氮素在土壤中淋失量相对较大，磷素淋失量相对较小。常规处理淋溶条件下，总氮流失主要以硝态氮为主。

Based on the analysis of nitrogen and phosphorus contents in leaching water of 8 underground leaching monitoring sites in Gansu Province， the nitrogen and phosphorus loss coefficients of underground leaching in Gansu Province were obtained. The total nitrogen loss coefficient was 0.19%～153.3%. The total phosphorus loss coefficient is from 0.0011%～0.32%. The amount of nitrogen leaching in the soil is relatively large， and the amount of phosphorus leaching is relatively small. Under the conventional treatment of leaching conditions， the total nitrogen loss is mainly nitrate nitrogen.

S158.3

甘肃省科技计划“甘肃省农田土壤N、P面源污染特征及防控技术研究”(1604FKCA125)部分内容。