水土保持学报2017，Vol.31Issue(6)：15-19,5.DOI:10.13870/j.cnki.stbcxb.2017.06.003
坡面侵蚀过程中泥沙有机碳流失特征分析
Characteristics of Sediment Organic Carbon Loss During Slope Erosion Process
摘要
Abstract
In this study,simulated rainfall was conducted to mainly investigate and analyze organic carbon content of sediment and its dynamic change during the rainfall on the outdoor runoff plot under random conditions.The sediment organic carbon content,which was significantly higher than that of the soil organic carbon (p＜0.01),decreased gradually during the early stage of the rainfall,then tended to be stable in the later stage.The organic carbon was obviously enriched in sediment,and the maximum of enrichment ratio was 1.780.The content and enrichment ratio of organic carbon in sediment decreased obviously with the increasing of erosion rate,and tended to be stable.The loss process of sediment organic carbon showed a unimodal distribution during the rainfall,which increased first with the rainfall,then decreased after reaching the maximum value,and finally tended to quasi stable.There was a significant linear relationship between soil organic carbon loss and soil erosion amount (p＜0.01),indicating that soil erosion amount determined the organic carbon loss during the erosion process,so accurate estimation of soil erosion intensity was the basis of estimating organic carbon loss on the slope.关键词
坡面侵蚀/模拟降雨/土壤有机碳流失Key words
slope erosion/simulated rainfall/soil organic carbon loss分类
农业科技引用本文复制引用
任瑞雪,张风宝,杨明义,王永吉,王子豪,邓鑫欣..坡面侵蚀过程中泥沙有机碳流失特征分析[J].水土保持学报,2017,31(6):15-19,5.基金项目
国家重点研发计划项目(2016YFC0402406) （2016YFC0402406）
国家自然科学基金项目(41571130082,41371283,41671281) （41571130082,41371283,41671281）
