水土保持研究2013，Vol.20Issue(1)：1-8,8.
等高反坡阶对坡耕地产流产沙和氮磷迁移的作用研究
Study on Contour Reverse-slope Terrace Controlling Soil and Water Loss and Nitrogen and Phosphorus Transfer in the Sloping Farmland
摘要
Abstract
An experiment was conducted on a slope cropland in Jianshan River basin, a typical catchment in the area of Fuxian Lake, the contour reverse-slope terrace was built in the typical catchment area of the tobacco field. The dynamic characteristics of nitrogen/phosphorus horizontal and vertical transfer in the sloping farmland from 2007 to 2008 were monitored under the condition of natural rainfall. The results showed that; (1) under the function of the contour reverse-slope terrace, it clearly reduced about 61, 9% of the surface runoff and decreased 77. 4% of soil erosion rate, and the events of erosion were reduced by 18 events, in the single rainfall event, the runoff and soil erosion control rate was 71. 27% and 84. 13%, respectively, the latter one has better function; (2) the control rates of transfer flux of TN, NO3- - N and TP in the runoff were 51. 04%, 45. 77% and 57. 40%, respectively, the control rates of transfer flux in the runoff soil TN, hydrolysis N,TP and available P were 81. 10%, 90. 93%, 92. 37% and 88. 00%; (3) there was no difference between the TN concentration and the soil deep in the soil layer from 0 to 110 cm of sloping land, but it was different in the soil layer from 0 to 200 cm in the level terrace surface, the TN concentration increased in the soil layer from 0 to 50 cm in the level terrace surface, it was 1.03～2. 19 times of sloping farmland, the total nitrogen concentration in the soil deep of 0-50 cm has a high reaction to the contour reverse-slope terrace; under the condition of different rainfall intensity and different fertilizer levels, there was difference between nitrogen and phosphorus transfer concentrations in the different soil layers, this measure can reduce or increase the transfer concentration.关键词
氮磷/迁移/等高反坡阶/面源污染Key words
nitrogen and phosphorus/ transfer/ contour reverse-slope terrace/ source pollution分类
农业科技引用本文复制引用
唐佐芯,王克勤,李秋芳,杨寿荣,李太兴,李宝荣..等高反坡阶对坡耕地产流产沙和氮磷迁移的作用研究[J].水土保持研究,2013,20(1):1-8,8.基金项目
国家自然科学基金项目"微区域集水系统控制云南山区农业面源污染"(30660037) （30660037）
西南林业大学水土保持与荒漠化防治重点学科 （）
