呼伦贝尔草甸草原羊草群落不同退化程度土壤理化指标  

Studies on the physical and chemical indicators of soil under different degree of degradation in Leymus chinensis community of Hulunbuir meadow steppe

作　　者：乌仁其其格[1,2,3] 武晓东[1] 闫瑞瑞[2] 

机构地区：[1]内蒙古农业大学生态环境学院,呼和浩特010019 [2]中国农业科学院呼伦贝尔草原生态系统国家野外科学观测研究站,呼伦贝尔021008 [3]呼伦贝尔学院生命科学与化学学院,呼伦贝尔021008

出　　处：《干旱区资源与环境》2009年第9期123-127,共5页Journal of Arid Land Resources and Environment

基　　金：中国农业科学院呼伦贝尔草原生态系统国家野外科学观测研究站开放课题<呼伦贝尔草甸草原不同退化程度下植被与土壤因子指示度研究>资助

摘　　要：文中对放牧干扰下不同退化程度呼伦贝尔草甸草原羊草群落土壤理化性质进行了研究。结果发现,土壤含水量、土壤全氮、土壤有机物、土壤速效氮随着退化程度的增加显著下降,而土壤容重、土壤(1-2mm)粗粒百分含量、土壤速效钾随着退化程度的增加而显著提高。土壤速效磷和pH值没有规律性变化。通过研究表明:土壤含水量、土壤容重、土壤(1-2mm)粒径粗粒、土壤有机物、全氮、速效氮和速效钾在不同退化程度之间都具有显著性差异,因此,这些指标可做为草甸草原羊草群落确定土壤退化程度的退化指标。The physical and chemical characteristic of soil of Hulunbuir meadow steppe Leymus chinensis community under different degradation degree of grazing disturbance were studied. The results showed that soil moisture, soil total nitrogen and available nitrogen decreased significantly with the increasing of degeneration degree, but soil bulk density, soil （1 -2mm） coarse- sandy particles, soil available K increased significantly with the degree of degradation. The trends of soil organic matter content were the first increase after the reduction. Available P and soil pH did not change regularly. Research showed that these indicators had significant difference. So that these indicators can be taken as degradation indicators to determine the extent of the degradation of soil of meadow steppe leymus chinensis community.

关 键 词：草甸草原 羊草群落 土壤理化性质 退化指标 

分 类 号：S151.9[农业科学—土壤学]