退化草地封育后土壤细颗粒增加机理探讨及研究展望  

Review on Mechanism of Fine Soil Particles Increase in Enclosed Grassland

作　　者：闫玉春[1] 王旭[1] 杨桂霞[1] 辛晓平[1] 

机构地区：[1]中国农业科学院农业资源与农业区划研究所农业部资源遥感与数字农业重点开放实验室/呼伦贝尔草原生态系统国家野外科学观测研究站,北京100081

出　　处：《中国沙漠》2011年第5期1162-1166,共5页Journal of Desert Research

基　　金：国家自然科学基金项目(40901053);公益性行业(农业)科研专项经费项目(201003061);内蒙古自治区重大科技项目(20091403)共同资助

摘　　要：土壤的恢复是退化草地生态系统恢复的难点和关键。土壤细颗粒物质的增加对退化的土壤系统恢复具有重要意义,不但可以改善土壤质地、也能输入土壤养分。通过综述退化草地封育后土壤细颗粒增加的研究案例,从植物有机体的归还、植物覆盖增加及其抑制风蚀作用和截存降尘的作用分析细颗粒增加的机理;重点总结了降尘对生态系统作用的研究进展;并从降尘对退化草地封育后土壤细颗粒增加的贡献以及草地植被对降尘的截存作用两个方面做了研究展望。Soil restoration is a difficult and key point for ecosystem restoration of the degenerated grassland.Increase of fine soil particles is very important to restoration of the degenerated soil system since it not only improve soil texture but also bring soil nutrients.By summarizing research cases on the fine soil particles increase in enclosed degenerated grassland,the authors in this paper analyze the mechanism of fine soil particles increase from aspects of return of plant organism,increase of vegetation cover and its role on preventing against wind erosion and on sequestration of dust fall.Finally,it is summarized that the research progress of dust fall＇s role on ecosystem;and prospect is looked forward to that future research in the fields of the contribution of dust fall on increase of fine soil particles in enclosed grassland and role of vegetation cover on sequestration of dust fall.

关 键 词：退化草地 恢复 降尘 截存 

分 类 号：S152.3[农业科学—土壤学]