甘南高寒草甸草原不同海拔土壤理化性质分析  

Analysis on the soil physicochemical properties of alpine meadow at different altitudes in Gannan

作　　者：刘月华[1] 位晓婷 钟梦莹[1] 武瑞鑫[1,2] 潘多[1] 邵新庆[1] 

机构地区：[1]中国农业大学动物科技学院草地研究所,北京100193 [2]甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730070

出　　处：《草原与草坪》2014年第3期1-7,共7页Grassland and Turf

基　　金：公益性行业(农业)科研专项(201203006);国家科技支撑计划(2012BAC01B02)资助

摘　　要：对甘肃夏河高寒草甸不同海拔梯度的土壤理化性质分异规律进行了研究,以期探究土壤理化性质与海拔之间的关系。结果表明：除0~10 cm 土层电导率外,其余各土层土壤理化指标均与海拔呈显著相关（P 〈0.05）,其中,含水量、有机质含量均随海拔升高而升高,且随土壤深度增加而降低；pH 随海拔升高呈先降低后升高的势态；0~10 cm 表层土壤全氮含量随海拔升高显著增加（P 〈0.05）,10~30 cm 土层全氮含量随海拔的升高先缓慢下降后平缓上升。因此,对于该区域草甸生态系统的管理与利用,不但考虑植被类型及状况,也需关注不同海拔梯度的草地土壤理化特性。Soil physicochemical properties of alpine meadow at different altitudes in Sangke of Xiahe County were studied for exploring the relationship between altitudes and soil physicochemical properties.The results in-dicated that the physicochemical indexes were highly correlated with altitudes （P 〈0.05）except the soil con-ductivity in 0~10 cm layer,in which,the contents of water and organic matter increased with elevation,pH val-ue increased first and then decreased along with altitude,the total nitrogen content in the surface layer （0~10 cm）significantly increased along the altitudinal gradient and it showed slightly decline and then slowly rising trend within 10~30 cm layer.It suggested that the soil properties should be considered for maintaining the sus-tainable development of grassland in the research area.

关 键 词：夏河 高寒草甸 海拔梯度 土壤理化性质 

分 类 号：S812.3[农业科学—草业科学]