期刊
JOURNAL OF ARID ENVIRONMENTS
卷 62, 期 2, 页码 309-319出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jaridenv.2004.11.009
关键词
sandy rangeland; heavy grazing; vegetation degradation; soil erosion; sandy desertification; Inner Mongolia
We conducted a grazing experiment from 1992 to 1996 in Inner Mongolia to explore desertification processes of sandy rangeland. The results show that continuous heavy grazing results in a considerable decrease in vegetation cover, height, standing biomass and root biomass, and a significant increase in animal hoof impacts. As a result, small bare spots appeared on the ground and later merged into larger bare areas in the rangeland. Total bare area reached up to 52% and the average depth of wind erosion was 25 cm in the fifth year of the study. We conclude that sandy rangeland with wind-erodible soil is susceptible to desertification. Heavy grazing of such rangeland should be avoided. (c) 2005 Elsevier Ltd. All rights reserved.
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