XU Tai-ping,ZHU Bo,WANG Tao,et al.Nutrient Loss from Slope Cropland of Purple Soil Under Different Rainfall Erosivities[J].Research of Soil and Water Conservation,2006,13(06):139-141,144.
不同降雨侵蚀力条件下紫色土坡耕地的养分流失
- Title:
- Nutrient Loss from Slope Cropland of Purple Soil Under Different Rainfall Erosivities
- Keywords:
- purple soil; slope cropland; rain-storm; nutrient loss; rainfall erosivity
- 分类号:
- S157
- 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。
- 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.
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备注/Memo
收稿日期:2005-11-17。
基金项目:中国科学院知识创新工程重要方向性项目（KZCX2-413和KZCX3-SW-330）资助
作者简介:徐泰平（1980- ），男，硕士生，主要从事农业生态研究.
通讯作者:朱波