水土保持学报2012，Vol.26Issue(4)：59-63,5.
紫色土坡耕地施肥水平对土壤侵蚀及氮磷流失影响
Effects of Different Fertilization Level on Erosion, Nitrogen and Phosphorus Losses on Sloping Farmland of Purple Soil
摘要
Abstract
Through monitoring the runoff in plots, the soil erosion characteristics and N and P losses were studied under CK, combined application of manure and fertilizer, chemical fertilizer, chemical fertilizer with increasing fertilization, and contour plowing with chemical fertilizer with ＂winter wheat-summer maize＂ on the sloping farmland of purple soil. Results were as follows： Effects of fertilization level and rainfall on runoff were quite remarkable, and second rainfall sediment loss was linearly related to rainfall on different fertilization levels. The relation between sediment loss and runoff was power function relation in the unit area with the increase of fertilization, while the relation was logarithmic function in other fertilization levels. Effects of fertilization level and rainfall on nitrogen and phosphorus concentration in runoff were quite remarkable. The varying trend of nitrogen and phosphorus concentration loss in runoff was consistent with the varying trend of rainfall on different fertilization levels. With increase of rainfall, nitrogen and phosphorus concentration fluctuation range were different on different fertilization levels~ combing application of manure and fertilizer, nitrogen and soluble phosphorus concentration in runoff were stable maximum concentrations of nitrogen and phos- phorus in runoff was consistent with occurrence of heavy rain on different fertilization levels, while additional fertilizer and other agricultural activities had influences on the maximum phosphorus concentration.关键词
紫色土/坡耕地/施肥水平/径流/泥沙/氮、磷流失Key words
purple soil sloping farmland fertilization level rainfall sediment~ nitrogen and phosphoruslosses分类
农业科技引用本文复制引用
郭甜,何丙辉,姚军,黄巍,谌芸..紫色土坡耕地施肥水平对土壤侵蚀及氮磷流失影响[J].水土保持学报,2012,26(4):59-63,5.基金项目
农业部公益性行业科研项目 （）
国家自然科学基金项目（40971166）国家科技支撑计划项目（2011BAD31803）I重庆市重大科技专项 （）
西南大学生态学重点学科“211工程”三期建设项目 （）
