草原暗栗钙土退化过程中的土壤性状及其变化规律的研究  

The Properties of Soil and Its Change Regularities in the Degradated Succession of Dark Chestnut in Leymus chinesis Steppe.

作　　者：关世英[1,2,3] 常金宝[1,2,3] 贾树海 李绍良[1,2,3] 陈有君[1,2,3] 王玉芬 

机构地区：[1]内蒙古林学院 [2]内蒙古农牧学院 [3]内蒙古农牧学校

出　　处：《中国草地》1997年第3期39-43,共5页Grassland of China

基　　金：中科院内蒙古草原生态系统定位站资助

摘　　要：对内蒙古锡盟白音锡勒牧场羊草草原放牧退化系列进行研究，测定了不同放牧强度或退化等级下的暗栗钙土物理性质和化学性质。结果表明，（１）０～１０ｃｍ土层有机质、全氮和全磷含量均随放牧强度的增加呈降低的趋势，有机质和全氮尤为显著。而ＮＨ４－Ｎ、ＮＯ３－Ｎ和速效磷含量则随放牧强度的增加降低的并不显著；（２）随着放牧强度的增加，土壤表层机械组成粗化，土壤沙化特征逐渐加强；（３）随着放牧强度的增加，土壤压实作用明显。The degradated series of Leymus chinesis Steppe in Baiyinxile Pasture, Inner Mongolia was studied, which included to test physical and chemical properties of soil. The results showed: (1) Soil organic matter, total N and tolal P were distinctly reduced with the increase of grazing intensity; (2) of the upper layer, the soil mechanical composition became coarse and its sandifical characteristic became obvious gratually with the increase of grazing intensity; (3) Soil compaction became distinct with the increase of grazing intensity.

关 键 词：羊草 草原 暗栗钙土 草原退化 放牧强度 

分 类 号：S812.4[农业科学—草业科学]