摘要
通过对试验地进行台田整地及各台田水盐动态数据的收集,研究唐山滨海泥质盐碱地5种不同隔离暗层台田水分和盐分动态情况。结果表明:研究区地下水位处于临界水位,易导致强烈积盐;土壤含水量与含盐量关系密切,从春季到秋季,土壤表层水盐呈现先降低后升高的趋势,中深层水分呈现先升高,后降低的趋势,土壤盐分变化与之相反;经过台田整地,台田土壤均由重盐化土变为盐化土,已适合耐盐碱树种生长发育。铺设隔离暗层的台田较未铺设隔离暗层的对照台田脱盐效果明显,其中,以"草层和砂石"为双隔离暗层的台田脱盐效果最佳,脱盐率高达30.46%,然后依次为"草层+炉渣"、"草层+薄膜"、"草层+建筑垃圾"和对照台田。
Water salt dynamic of five different platform fields by insulating hidden of two layers were researched in coastal argillaceous saline land of Tangshan from the prepared of platform field and the date collection of the water-sah dynamic. Results showed that, the experimental plot is easily lead to salt accumulated which the water table was above the critical depth. There is a close relation between the water content and salt content, from spring to autumn, the ＇down up＇ process of water and salt appears in soil surface layer, it is inversely which water showed ＇up-down＇ and the salt changed as opposite trend in soil middle and deep layer. After the build of platform field, the soil of platform field which from heavey salinized soil into slinized soii is appropriate to growth by saline-alkali tolerant tree species. The effect of desalination is obvious in the platform field which lying the insulating hidden layers. The best effect of desalination is the layers by grass and gravel which the desalination ratio as high as 30.46%, then load decreased with the order of grass and slag, grass and plastic film, grass and garbage architecture, control platform field.
出处
《水土保持研究》
CSCD
北大核心
2009年第5期104-109,共6页
Research of Soil and Water Conservation
基金
“948”国家林业局引进项目“保育基盘法播种造林成套技术引进”(2006-4-47)
关键词
盐化土
水盐动态
双隔离暗层
台田
含水量
含盐量
脱盐率
salinized land
water-salt dynamic
insulating hidden of two layers
platform field
water content
salt content
desalination ratio
