摘要
从水田流走的植物营养素在农业面源污染负荷中占主要部分,关于它们流失方式的分析是寻求适当的控制措施减少污染负荷的前提.水田植物营养素的流失途径是降雨径流和灌溉回归水,其浓度与土壤类型、作物状态和施肥等因素有关,控制它的最佳途径是改进耕作制度.
The botanical nutrients running off from paddy tiel-ds occupy a dominant part in the agricultural non-point pollution loading. The analysis of running ways is the key to suitable control measures for reducing botanical nutrient loss from paddy fields. The ways of nutrient loss are rainfall run-off and irrigating return-flow, and the nutrient concentrations are dependent on soil types, crop growing and fertilizing etc. The best way for controlling the loss is to improve the methods of cultivation.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1991年第3期88-91,共4页
Environmental Science
关键词
水田
植物营养素
控制
botanical nutrient, paddy field, con-trol method.
