摘要
本文研究了灌溉水质对田间原状土壤非饱和导水率的影响及其机理。研究结果表明，灌溉水质对土壤导水率有显著影响，随灌溉水矿化度增加，土壤导水率变大，而灌溉水钠吸附比（SAR）则有相反的作用，SAR愈高，土壤导水率愈低。本文还研究了灌溉水非常低的矿化度对土壤导水率产生的不可逆效应以及表土和底土导水率的差异，同时还研究了灌溉水质对土壤物理性质的影响。
The effect of irrigation water quality on unsaturated hydraulic conductivity (k) of undisturbed soil and its mechanism were studied. Results showed that the higher the mineralization degree of irrigation water, the higher the soil hydraulic conductivity became. High sodium-adsorption ratio (SAR) of irrigation water would have an unfavorable effect on soil hydraulic conductivity. The irrigation water with a very low mineralization degree had an irreversible effect on soil hydraulic conductivity, inducing a significant decrease of soil hydraulic conductivity. The effect of irrigation water quality on physical properties of the experimental soil was also studied.
出处
《土壤学报》
CAS
CSCD
北大核心
1998年第3期359-366,共8页
Acta Pedologica Sinica
基金
国家自然科学基金!49271044
关键词
灌溉
水质
土壤导水率
物理性质
Irrigation water quality, Hydraulic conductivity, Physical properties
