溶质施加方式对土壤溶质迁移的影响  

Effects of Solute Application on Soil Solute Transport

作　　者：曹红霞[1] 康绍忠[1,2] 

机构地区：[1]西北农林科技大学教育部旱区农业水土工程重点实验室 [2]中国农业大学水利与土木工程学院,北京100083

出　　处：《灌溉排水学报》2003年第2期5-8,共4页Journal of Irrigation and Drainage

基　　金：教育部科学技术研究重点项目 (重点 0 2 0 75 )资助

摘　　要：通过室内均质土柱试验 ,对不同灌水处理土壤中表施和灌施溶质的迁移规律进行了研究。结果表明 ,溶质施加方式和灌水频率对溶质迁移影响较大。次灌水量较大时 ,表施和灌施条件下溶质分布差异显著 ;当次灌水量很小且灌水非常频繁时 (如 6mm/ d) ,表施和灌施土壤中溶质 (NO- 3)分布差异不大。Harmonious application of water and fertilizers is a key mean of preventing and alleviating nitrate pollution in groundwater. Nitrate transports, under surface application and chemigation, in soils treated with different irrigation patterns were investigated with disturbed soil column in laboratory. Results showed that solute application method and irrigation frequency has a great influence on solute transport. The difference between surface application and chemigation on solute distribution is notable under great quota per irrigation and low frequency, and is insignificant under small quota per irrigation and high irrigation frequency.

关 键 词：溶质施加方式 灌施表施 灌水频率 溶质迁移 

分 类 号：S152[农业科学—土壤学]