二次降雨条件下紫色土壤中流的氮磷流失特征研究  

Characteristics of Nitrogen and Phosphorus Loss in Subsurface Flow of Purple Soil under Conditions of Two Games Rainfall

作　　者：王玉霞[1] 龙天渝[1] 卢齐齐[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《中国水土保持》2011年第5期33-35,69,共3页Soil and Water Conservation in China

基　　金：国家水体污染与治理科技重大专项项目(2009ZX07104-002)

摘　　要：地表径流及壤中流中N、P的流失是造成非点源污染的主要原因。以重庆地区紫色土为研究对象,通过人工模拟降雨试验,研究了地表径流和壤中流中N、P流失随地面坡度、降雨强度及土壤改良剂聚丙烯酰胺(PAM)施用量的不同而变化的特点,分析了不同土层深度壤中流的N、P流失特征,为防治非点源污染、增加土壤蓄水、提高土壤养分等提供了科学依据。The loss of nitrogen(N) and phosphorus(P) of surface runoff and subsurface flow is the main reason for causing non-point source pollution.The paper studies the characteristics of variations of N and P loss of surface runoff and subsurface flow under conditions of two games along with the difference of slope,rainfall intensity and polyacrylamide(PAM) application for soil improvement and analyzes the characteristics of N and P loss of subsurface flow in different depth of soil through artificial simulated rainfall tests by taking purple soil of Chongqing region as an object of study,providing scientific basis for preventing and controlling non-point source pollution and increasing soil moisture and nutrients.

关 键 词：二次降雨 紫色土 壤中流 聚丙烯酰胺 

分 类 号：X52[环境科学与工程—环境工程] S153[农业科学—土壤学]