不同肥力土壤各级微团聚体中主要营养元素含量的变化  

Contents of Main Nutrient Elements in Varied Levels of Micro-aggregates of Different Soils

作　　者：汪景宽[1] 于树[1] 李丛[1] 王国风[1] 

机构地区：[1]沈阳农业大学,沈阳110161

出　　处：《水土保持学报》2007年第6期122-125,共4页Journal of Soil and Water Conservation

基　　金：国家重点基础研究发展规划"973"项目(2005CB121108)

摘　　要：为了探讨不同肥力土壤团聚体中主要营养元素含量的变化情况,以我国东部3种地带性土壤(黑土、棕壤和红壤)为研究对象,分别测定了其全量营养元素的含量,并进行了比较分析。结果发现,各营养元素在不同类型土壤中呈地带性分布。由北向南,有机碳、全氮、全磷、全钾、全钙、全镁的含量呈逐渐降低的趋势,全铁、全铝的变化趋势则相反;施用有机肥能明显增加土壤中各种营养元素的含量。无论哪个粒级的微团聚体,有机碳、全氮含量呈北高南低的趋势;钾素的变化呈北高南低分布。除了硅素外,其余营养元素在<2μm粒级内富集。对于不同肥力的土壤而言,各营养元素在高肥力土壤中含量较高;在不同肥力的各级团聚体中,也是主要分布在<2μm粒级范围内。In order to discuss the change on main nutrient element contents in micro-aggregates of different fertility soils,this paper determined and analyzed the contents of main nutrients in soil of the eastern China（black soil,brown earth and red soil）.The results are as follows： the total nutrient element appeared to be distributed basing on zones.The content of organic C,total N,P,K,Ca,Mg decreased gradually,but total Fe and Al increased from north to south.Applying organic manure could significantly increase the contents of nutrient elements. No matter which levels of micro-aggregates in nature soils,the contents of organic C,total N appear the decreased trend from north to south,but the trend of total K reverse.Except Si,the other elements enriched in 〈2 μm micro-aggregate.According to different fertility levels,there were high contents in high fertility level.In different micro-aggregates of different fertility levels,the main nutrient elements were mostly distributed in 〈2 μm micro-aggregate.

关 键 词：不同肥力土壤 微团聚体 营养元素 

分 类 号：S152.4[农业科学—土壤学] S158.2[农业科学—农业基础科学]