白洋淀典型台田湿地土壤生源元素剖面分布特征  

Profile Distribution Characteristics of Living Elements in Wetland Soils from Typical Raised Field in Baiyangdian Lake

作　　者：蒋薇[1] 白军红[1] 高海峰[1] 肖蓉[1] 刘泓汐[1] 曾思原[1] 

机构地区：[1]北京师范大学环境学院/水环境模拟国家重点实验室,北京100875

出　　处：《水土保持学报》2009年第5期261-264,共4页Journal of Soil and Water Conservation

基　　金：国家重点基础研究计划(2006CB403301);国家自然科学基金项目(40701003);国家重大专项(2009ZXD7209-008)

摘　　要：研究了在人为干扰作用下白洋淀典型台田湿地土壤中碳氮磷等生源元素的剖面分布特征。结果表明,台田湿地土壤有机碳随土层深度增加呈现先增加后减少的趋势,累积峰出现在10-20 cm土层;无机碳大致呈先减小后增加的趋势,而全碳大致呈先增加后减小的趋势;各形态氮和全氮含量随深度的增加出现较大的波动,但总体上呈现出深层土壤含量高于上部土层的趋势;土壤C/N比较低,C/N比与有机碳含量有显著的相关性,与全氮无显著的相关性;有效磷含量随着土层加深呈现增加趋势,全磷含量总体上呈现波动性变化,存在两个累积峰。Profile distribution was studied for such living elements as carbon,nitrogen and phosphorous in wetland soils from raised field in Baiyangdian Lake.Results showed that soil organic carbon contents showed changes of ＂decreasing after increasing＂,with an accumulated peak at the 10-20 cm soil layer.However,inorganic carbon showed the opposite changing tendency of ＂increasing after decreasing＂.Total carbon showed ＂decreasing after increasing＂ tendency.Contents of total nitrogen and all nitrogen forms fluctuated with depth in soil profiles,but their contents in deeper soils were generally higher than those in upper soils.The C/N ratios were relatively lower,and they were significantly correlated with soil organic carbon,but not with total nitrogen.Available phosphorous increased with depth in soil profiles,while total phosphorous contents fluctuated with depth,with two accumulated peaks.

关 键 词：人为干扰 台田 湿地土壤 生源要素 剖面分布 

分 类 号：S153.6[农业科学—土壤学]