摘要
土壤金属元素在评价土壤理化性质及生物营养水平方面具有重要作用。高寒草甸土壤金属元素含量及分布受母质、土壤理化性质、气候、地表覆被以及人类活动的影响。母质类型从根本上决定土壤金属元素的含量。土壤粒度、有机质和酸度是导致土壤金属元素化学组成与母质组成产生差异的主要原因。土壤金属元素对气候变化和地表覆被变化的响应一定程度上反映了土壤环境变化对金属元素的影响。在母质、土壤理化性质、气候、地表覆被以及人类活动的综合作用下,土壤金属元素水平分布特征与土壤和植被地带性分布规律一致;沿土壤剖面的分布特征表现为三种分布形式,即表层富集型、底层富集型和表层与底层高而中间层低的"中空"型。
Soil metal elements have important effects on evaluation of soil physical and chemical properties and nutrition level of organism.The influential factors of soil metal elements in Alpine Meadow include parent material,soil physical and chemical properties,climate,surface cover and human activities.The type of parent material fundamentally determines the content of metal elements in soil.Soil particle size,organic matter and soil acidity are the main causes that make the chemical composition of metal elements in soil different from that in parent material.Response of soil metal elements to climate change and surface cover change reflects the effect of soil environment change on soil metal elements.The impacts of parent material,soil physical and chemical properties,climate,surface cover and human activities on distributions of soil metal elements are significant.The horizontal distribution of soil metal elements is similar with soil and vegetation horizontal zonality.As far as the distributions along with soil depth are concerned,there are three types,that is,enrichment in upper layer type,enrichment in lower layer type and enrichment in both upper and lower layer type.
出处
《草业与畜牧》
2010年第9期1-5,共5页
Pruataculture & Animal Husbandry
关键词
高寒草甸
土壤金属元素
分布
影响因子
Alpine meadow
Soil metal elements
Distribution
Influential factors
