【摘要】 在野外采样、室内分析和前人研究资料的基础上,对我国不同地带沙地盐分状况及其分异规律、盐分含量与气象要素的关系、沙地植被对土壤盐分淋溶的影响等方面进行了探讨.更多还原

【Abstract】 According to the results which use PCA and hierachical clustering to analyse salt content of drifting sand, 12 sandlands (sandy deserts) of our country are devided into 4 types of salt leaching sandland, i.e. strong leaching, leaching, weak leaching and non-leaching. Analysis shows that the ratio of evaporation to precipitation is a key factor that affect the salt status of sandland, rather than air temperatrue. Existence of vegetation can weaken salt leaching to different extent in each natural zone.更多还原