不同土地利用类型土壤有机质与全氮供应研究  

Analysis of Soil Organic Matter and Total Nitrogen under Different Land Use Types

作　　者：蒋薇[1] 

机构地区：[1]西南林业大学环境科学与工程学院,云南昆明650224

出　　处：《绿色科技》2014年第5期10-12,共3页Journal of Green Science and Technology

基　　金：国家自然科学基金(编号:30660037);云南省自然科学基金(编号:2006D0041M);云南省科技计划(编号:2006SG20)资助

摘　　要：选取了我国西南部抚仙湖流域典型流域尖山河小流域为试验区，以不同土地利用类型的径流小区作为试验对象，对径流小区内土壤不同土层有机质和全氮含量进行了测定分析。结果表明：土壤剖面有机质及全氮含量均随着土层深度的增加而降低，即0～20cm〉20～40cm〉40～60cm，且随深度增加含量差距减小；在同种土地利用类型中，土壤全氮含量随有机质含量的增加而增加；在4种土地利用类型中，土壤有机质含量表现为次生林〉人工林〉灌草丛〉坡耕地，全氮含量表现为灌草丛〉坡耕地〉人工林〉次生林，说明在土地利用类型不同且人为干扰严重的情况下，土壤全氮含量随有机质含量变化的程度不同。This article mainly studies the soil organic matter and total nitrogen contents of four different land use types in Jianshan River, a typical small watershed of Fuxian Lake. The results show that： the organic matter and total nitrogen contents decreas with the increase of soil depth,that is 0-20cm 〉 20-40cm 〉 40-60cm. With the increase of soil depth,the gap of contents decrease;in the same land use type,soil total ni- trogen content increase with the increase of the organic matter content; the content of soil organic matter of four land use types is secondary forest 〉 planted forest 〉 shrub--grassland 〉 farmland,and the content of total nitrogen in sequence from high to low is shrub--grassland, farmland, planted forest and secondary for- est. It proved that in different land use types and in the case of serious human disturbance,the variation de- gree of soil total nitrogen content varies with the changes of soil organic matter content.

关 键 词：土地利用类型 土壤 有机质 全氮 

分 类 号：X15[环境科学与工程—环境科学]