干旱区生态环境知识资源中心(Arid): 放牧对古尔班通古特沙漠南部半固定沙垄地表性质的影响

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	放牧对古尔班通古特沙漠南部半固定沙垄地表性质的影响
其他题名	Effects of spring-summer grazing on longitudinal dune surface in southern Gurbantunggut Desert
	王雪芹; 张元明; 蒋进; 杨维康; 郭洪旭; 胡永锋
ISSN	1009-637X
出版年	2009
卷号	19 期号:3 页码:299-308
英文摘要	Intensive grazing in spring-summer has been responsible for environmental degradation of the Gurbantunggut Desert in recent years. The coverage of plants and biological crusts, sand surface stability and physicochemical characteristics of soil on the dune surface were conducted in 2002 (winter grazing) and 2005 (spring-summer grazing). The results showed that over 80% of the total area of the dune surface was covered by well-developed biological crusts and plants in 2002, when the interdune and middle to lower part of dune slopes were stabilized and only the crest had 10-40 m wide mobile belt. Affected by spring-summer grazing in 2005, over 80% of the total cover of biological crust was destructed and the plant coverage only reached 1/5 of that in 2002, especially the ephemeral plant cover had a great change. The value of sand transport potential in 2005 only reached 1/3 of that in 2002, but the total surface activity in 2005 was 1.6 times stronger than that in 2002. Mean-while the mobile area began to expand from the dune top to the whole dune surface following spring-summer grazing. Compared with 2002, medium sand content of the dune surface soil increased by 13.9%, while that of fine and very fine sands decreased by 7.4% and 8.0% respectively in 2005 and the soil organic matter in 2005 was only about 1/2 of that in 2002. It is obvious that the presence of snow cover and frozen soil in winter could avoid the surface structure destruction in winter, while spring-summer grazing made excessive damage to biologic crusts and ephemeral plants. Spring is the main windy season in Gurbantunggut Desert and therefore intensive activity of dune surface occurred following spring-summer grazing, which led to a great loss of fine sand and organic matter. It can be seen that grazing season have a significant influence on the sustainable development of the desert ecosystem in Northwest China.
英文关键词	spring-summer grazing semi-fixed longitudinal dune dune surface characteristics Gurbantunggut Desert
语种	英语
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:3536463
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223257
作者单位	Xinjiang Institute of Ecology and Geography, CAS, Key Laboratory of Oasis Ecology and Desert Environment, Urumqi, Xinjiang 830011, China
推荐引用方式 GB/T 7714	王雪芹,张元明,蒋进,等. 放牧对古尔班通古特沙漠南部半固定沙垄地表性质的影响[J],2009,19(3):299-308.
APA	王雪芹,张元明,蒋进,杨维康,郭洪旭,&胡永锋.(2009).放牧对古尔班通古特沙漠南部半固定沙垄地表性质的影响.,19(3),299-308.
MLA	王雪芹,et al."放牧对古尔班通古特沙漠南部半固定沙垄地表性质的影响".19.3(2009):299-308.