地表径流中K、Na流失量分析及其影响因素研究  

Analysis on K and Na Losses in Surface Runoff and Study on Its Effective Factors

作　　者：李俊波[1] 华珞[1] 付鑫[2] 蔡典雄[3] 冯琰[1] 朱凤云[1] 马礼[1] 周万荣[3] 

机构地区：[1]首都师范大学,北京100037 [2]北京市测绘设计研究院,北京100038 [3]中国农业科学院土壤肥料研究所,北京100081

出　　处：《中国水土保持》2005年第2期5-7,共3页Soil and Water Conservation in China

基　　金：北京市自然科学基金项目 (60 1 2 0 0 4 ) ;863国家重大项目专题 (2 0 0 2AA6Z30 2 1 ) ;首都师范大学资源环境与地理信息系统北京市重点实验室项目

摘　　要：采用人工模拟降雨装置对密云县农田褐土进行的K、Na流失量试验研究表明 :在相同雨强、坡度条件下 ,K、Na流失量为秸秆覆盖 <草皮覆被 <裸地 ;相同地表状况与坡度条件下K、Na流失量与雨强呈正相关 ;同雨强下泥沙携带的与秸秆覆盖地表下径流水中的K、Na流失量随坡度的增加而增大 ,坡度对裸地和草皮覆被地表径流水携带的K、Na流失量峰值有影响。采用覆盖保护措施对抑制坡地K。The tests and study on the amount of K and Na losses conducted in drab soil farmlands in Miyun County by utilizing artificial simulated precipitation facilities show that under the same conditions of rainfall intensity and slope, the amount of K and Na losses is stalks cover < turf cover < exposed land; under the same conditions of land surface and slope, the amount of K and Na losses and rainfall intensity are in positive correlation and; under the same conditions of rainfall intensity,the amount of K and Na losses carried out by sediment and that of in surface runoff covered by stalks are increasing as the increase of slopes. Slope affects the peak value of K and Na losses carried by surface runoff under the conditions of exposed land and land with turf cover. Adopting protective measures of cover can effectively control K and Na losses of slope lands.

关 键 词：土壤侵蚀 K、Na流失量 模拟降雨 地表覆盖 

分 类 号：S157.1[农业科学—土壤学]