摘要
通过室内土柱脱盐试验及淋洗前后土壤盐分、离子组成的对比分析,探讨了研究区吹填土的脱盐规律,结果表明:在水分入渗初期,表层土壤溶液盐分浓度迅速下降,随着水分盐分的继续下移,在下层土壤中形成盐峰。灌水后土壤的脱盐率高,土壤pH值上升,土壤的Na+、Cl-、SO42-、K+、Mg2+、Ca2+含量下降,CO32-、HCO3-含量有所上升,盐分淋洗快速且完全,同时分析了淋盐前后的养分情况,对今后研究区的绿化工作有一定的指导意义。
An indoor soil column desalting experiment was carried out and the soil salinity and ion compositions were analyzed before and after leaching. Then the dynamic law of salt water movement of dredger fill was analyzed. The results indicated that the salinity in surface soil solution declined quickly at the beginning of the water infiltration,and the salt peak emerged in the deep horizon with the time elapsing. After irrigation,soil pH and the concentrations of CO32-and HCO3-increased,while the concentrations of Na＋,Cl-,SO42-,K＋,Mg2＋,and Ca2＋ decreased. The salinity eluviated quickly and thoroughly,and the desalination rate was high. Furthermore,this result was helpful for the virescence of the research region.
出处
《天津农业科学》
CAS
2010年第5期6-8,共3页
Tianjin Agricultural Sciences
基金
国家科技支撑计划项目(2007BAD67B01)
天津市农业科学院院长基金项目(08015)
关键词
吹填土
脱盐规律
土壤养分
灌水
脱盐
dredger fill
soil desalting laws
soil nutrient
irrigation
desalinization
