滇池宝象河流域土壤磷素变异特征及影响因素研究  

Research on Soil Phosphorus Variation and Influential Factors in Drainage Basin of Baoxiang River in Dianchi

作　　者：杨振兴[1] 张乃明[1] 王磊[1] 张刚[1] 

机构地区：[1]云南农业大学资源与环境学院,昆明650201

出　　处：《土壤》2011年第1期39-43,共5页Soils

基　　金：国家自然科学基金项目(40761014);国家科技支撑计划项目(2007BAD87B12-3)资助

摘　　要：磷(P)是水体富营养化的一个重要的限制因子,本文以滇池宝象河流域土壤为研究对象,对流域内不同土地利用类型土壤P素时空变异特征以及其影响因素进行研究。结果发现流域内P素有明显累积。P素含量会受到土壤流失的影响,不同土地利用类型不同形态P素累积与流失情况也不同,同时,Olsen-P与pH、OM有很好的正相关性。研究结果可以为防止不同土地利用类型土壤P素流失提供依据,为滇池宝象河流域精确农业的研究和实施提供了一定的参考依据。Phosphorus is a crucial factor for water eutrophication.Taking soil in drainage basin of Baoxiang River as the study subject in this paper,the spatial-temporal variation and its influence factors of phosphorus in different land use types were studied.The results showed that phosphorus accumulated obviously in the drainage basin,phosphorus accumulation and loss could be influenced by soil loss and by different land use types.There were positive correlations between Olsen-P and pH,soil organic matter.The above results are helpful for preventing soil phosphorus loss in different land use types and for the study and implement of regional precision agriculture.

关 键 词：滇池 土壤 磷素 时空变异 

分 类 号：S156.4[农业科学—土壤学]