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不同降雨侵蚀力条件下紫色土坡耕地的养分流失
引用本文:徐泰平,朱波,汪涛,况福虹.不同降雨侵蚀力条件下紫色土坡耕地的养分流失[J].水土保持研究,2006,13(6):139-141,144.
作者姓名:徐泰平  朱波  汪涛  况福虹
作者单位:1. 中国科学院成都山地灾害与环境研究所,成都,610041;中国科学院研究生院,北京,100039
2. 中国科学院成都山地灾害与环境研究所,成都,610041
基金项目:中国科学院知识创新工程项目
摘    要:通过对川中丘陵区几次暴雨过程氮、磷流失的观测与分析,研究了不同降雨侵蚀力条件下的紫色土坡耕地的养分流失特征。结果表明在产流初始阶段,氮、磷流失严重,径流中养分输出浓度比较高,总氮最大可达8.0 mg/L左右,总磷在1.9 mg/L左右;坡耕地养分流失与土壤侵蚀的关系密切,氮、磷迁移以泥沙吸附态迁移为主,径流中的颗粒态氮、磷含量随降雨侵蚀力增大而增大,而溶解态氮、磷含量与降雨侵蚀力无明显相关。

关 键 词:紫色土  坡耕地  暴雨  养分流失  降雨侵蚀力
文章编号:1005-3409(2006)06-0139-03
收稿时间:2005-11-17
修稿时间:2005-11-17

Nutrient Loss from Slope Cropland of Purple Soil Under Different Rainfall Erosivities
XU Tai-ping,ZHU Bo,WANG Tao,KUANG Fu-hong.Nutrient Loss from Slope Cropland of Purple Soil Under Different Rainfall Erosivities[J].Research of Soil and Water Conservation,2006,13(6):139-141,144.
Authors:XU Tai-ping  ZHU Bo  WANG Tao  KUANG Fu-hong
Institution:1. Institute of Mountain Hazard and Environment, Chinese Academy of Science, Chengdu 610041; 2. Graduate School of Chinese Academy of Sciences ,Beijing 100039;3. College of Resources and Environment, Southwest Agricultural University, Chongqing 400716
Abstract:The characteristics of nutrient loss from slope cropland of purple soil under different rainfall erosivities were studied from several rain-storm processes in the central Sichuan Basin.The results showed that the main lost nutrient happened at the beginning of the runoff.The highest concentration of total N and total P exported in runoff was as high as 8.0 mg/L and 1.9 mg/L respectively.There was significantly positive correlation between the rainfall erosivity and the amounts of particulate form which was dominative in the lost nutrient of surface runoff;while dissolved nutrient in runoff was not interrelated with the rainfall erosivity.
Keywords:purple soil  slope cropland  rain-storm  nutrient loss  rainfall erosivity
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