陕北黄土高原小流域土壤有效铜分布特征  

Distribution Characteristics of Soil Available Copper in a Small Watershed of North Shaanxi Loess Plateau

作　　者：李社新[1] 李占斌[1] 张晓霞[1] 

机构地区：[1]西安理工大学西北水资源与环境生态教育部重点实验室,陕西西安710048

出　　处：《水土保持通报》2011年第1期114-116,210,共4页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目"基于小流域淤积信息的侵蚀产沙与侵蚀环境变化响应研究"(40971161);国家自然科学基金项目"坡沟系统侵蚀产沙过程与调控机理试验研究"(40771124);陕西省自然科学基金重点项目"陕北能源基地开发建设对水土资源环境演变作用机制研究"(SJ08-ZD02)

摘　　要：采用分层取样的方法,对陕北王茂沟小流域土壤有效铜的分布特征进行了研究。在研究区流域内,土壤有效铜的均值高于黄土区土壤有效铜的临界值;沟坡部分有效铜含量最高,峁坡部分有效铜含量最低;不同坡向有效铜含量大小为:半阳坡>阳坡>半阴坡>阴坡;土壤有效铜与有机质在20—30cm土层处相关性最强。The distribution characteristics of available copper in Wangmao gully watershed of Northern Shaanxi Province were investigated using a stratified sampling method.In the studied watershed,the mean value of available copper was higher than the critical value in the loess area.Effective soil copper was found high in slope areas of gullies and low in slope areas of mounds.In terms of slope aspects,the sequence of effective soil copper was semi-sunny slopesunny slope semi-shaded slopeshaded slope.The strongest correlation between effective soil copper and soil organic matter was identified in the soil layer of 20—30 cm.The research provides solid evidences for studies regarding the distribution of soil trace elements in Loess Plateau region.

关 键 词：土壤有效铜 地貌部位 坡向 有机质 黄土高原 

分 类 号：S157.2[农业科学—土壤学]