水土保持学报2011，Vol.25Issue(3)：7-11,5.
黄土高原人为加速侵蚀下水土与养分流失耦合研究
Study on the Coupling Effect of Erosion and Nutrient Lost under Manmade Accelerated Erosion on Loess Plateau
摘要
Abstract
The coupling effect on erosion and nutrient lost of arable, grassland and woodland, were studied based on different land-use patterns, with simulated rainfall equipment. The results showed that the runoff and sediment caused the soil became less fertile. The nutrient in sediment was higher than that in run-off, which was the main ways of nutrient losses. Man-made accelerated erosion caused by arable land tillage, soil erosion rate(SER) and sediment yield(SY) increased by 27. l％ and 27.3％, but runoff yield(RY) decreased by 22.4％. The total dissolved organic carbon (TDOC), total nitrogen (TN) and total dissolved phosphorus (TDP) in soil, increased by 104.5 ％, 42.5 ％ and 59.5 ％, compared with natural soil. There was a significantly effect on water and soil conservation of grassland and wood land. The SER increased by 188.9％ and 10225.1％, SY increased by 190.6％ and 9 370.0％, RY increased by 44.9％ and 85.3％, respectively, in grassland and woodland, compared with natural soil. The TDOC, TN and TDP increased by 104.1％, 69.9％ and 18. 2％ after grassland and woodland, respectively. Compared with natural soil,the TDOC, TN and TDP increased by 6.1, 4.7,15.1 times after remove forest litter, but increased by 18.1, 8.6,27.2 times after tillaged. The main way of nutrient loss with run-off after remove forest litter, while with sediment after tillaged.关键词
径流/泥沙/草地/林地/养分流失Key words
runoff/ sediment/ grassland/ woodland/ nutrient loss分类
农业科技引用本文复制引用
陈磊,李占斌,李鹏,穆军,贾莲莲..黄土高原人为加速侵蚀下水土与养分流失耦合研究[J].水土保持学报,2011,25(3):7-11,5.基金项目
国家重点基础研究发展计划(2011CB403302) （2011CB403302）
国家自然科学基金(40971161) （40971161）
