辽宁省不同耕作方式对坡耕地水土及氮磷养分流失的影响效果  

Effects of Different Tillage Modes on Soil,Water and N,P Nutrient Loss on Sloping Croplands in Liaoning Province

作　　者：辛艳[1] 王瑄[1] 邱野[1] 李德利[1] 赵倩[1] 

机构地区：[1]沈阳农业大学水利学院,沈阳110866

出　　处：《水土保持学报》2013年第1期27-30,共4页Journal of Soil and Water Conservation

基　　金：辽宁省自然科学基金项目(201102193);辽宁省教育厅项目(L2010496)

摘　　要：在天然降雨条件下,研究传统耕作、免耕、免耕秸秆覆盖、横垄4种耕作方式对坡耕地水土流失和养分流失的影响效果。结果表明:与传统耕作相比,其他3种耕作方式均能减少水土流失,产流量分别较之减少19.3%,27.1%,31.8%,泥沙量对应减少12.4%,21.5%,57.8%;各耕作小区径流中养分流失量差异显著;泥沙中全磷流失特征为T1>T3>T2>T4,其他耕作小区比传统耕作小区减少流失依次为8.6%,5.1%,12.1%;泥沙中的全氮流失特征为T1>T2>T3>T4,其他耕作小区比传统耕作小区减少流失依次为6.4%,10.3%,34.3%。坡耕地土壤侵蚀量与径流量呈显著相关。The effects of four agricultural tillage modes including conventional tillage, no-till, no-till and straw mulching, cross-plowing tillage were studied on soil, water and N, P nutrient loss on sloping croplands under natural rainfall in Liaoning province. The result showed that the other tillage modes did better than conventional tillage in decreasing the loss of runoff and sediments. As compared to the conventional tillage, the others tillage modes decreased the runoff 19.3%, 27.1%, 31.8% and decreased the sedimentation 12.4%, 21.5%, 57.8%. The differences in the loss of the nutrients in different tillage were significant in runoff. The character of the loss of total phosphorus was TI〉T3〉T2〉T4. The character of the loss of total nitrogen was T1〉 T2〉T3〉T4. As compared to the conventional tillage, the others tillage modes decreased the TP 8.6%, 5.1%, 12.1%, decreased the TN 6.4%, 10.3%, 34.3%. The differences between the runoff and sediments were significant.

关 键 词：天然降雨 坡耕地 耕作模式 水土流失 养分流失 

分 类 号：S157.1[农业科学—土壤学] S157.2[农业科学—农业基础科学]