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	Dynamics of vegetation and soil carbon and nitrogen accumulation over 26 years under controlled grazing in a desert shrubland
	Zhou, Zhi-Yu2; Li, Feng-Rui1; Chen, Shan-Ke3; Zhang, Hong-Rong2; Li, Guangdi4
刊名	PLANT AND SOIL
	2011-04-01
卷号	341期号:1-2页码:257-268
关键词	Arid desert ecosystems Haloxylon ammodendron Livestock control Long-term monitoring Soil carbon stock Soil nitrogen stock Vegetation recovery
ISSN号	0032-079X
DOI	10.1007/s11104-010-0641-6
通讯作者	Li, Feng-Rui(lifengrui@lzb.ac.cn)
英文摘要	For decades, arid desert ecosystems in northwest China, covering one-fourth the country's land surface, have experienced a rapid decline in plant species diversity, productivity and soil carbon stock owing to degradation by overgrazing. In this study, plant community composition, diversity and productivity, as well as soil carbon (C) and nitrogen (N) stocks, were monitored over 26 years from 1981 to 2006 in a severely degraded Haloxylon ammodendron-dominated shrubland where livestock densities were reduced from 4-5 to 1-2 dry sheep equivalent ha(-1). The objective was to assess long-term grazing effects on vegetation and soil C and N accumulation dynamics. Results showed that the reduction of grazing pressure significantly increased vegetation cover, plant diversity and productivity, resulting primarily from an increase in livestock-preferred species. Controlled grazing also led to marked increases in soil C and N stocks in the top 30 cm of soil. This increase was strongly associated with increased plant species richness, vegetation cover and biomass production. Averaged over 26 years, soil C and N accumulated at rates of 89.9 g C and 8.4 g N m(-2) year(-1), respectively, but rates of C and N accumulation varied greatly at different time periods. The greatest species regeneration occurred in the first 8 years, but the largest C and N accumulation took place during years 9-18, with a time-lag in response to changes in vegetation. Our results provide insights into the long-term recovery patterns of different ecosystem components from the influence of prolonged overgrazing disturbance that cannot be inferred from a short-term study. The findings are important for assessing the resilience of these livestock-disturbed desert ecosystems and developing a more effective strategy for the management of this important biome from a long-term perspective.
收录类别	SCI
WOS关键词	PLANT-SPECIES DIVERSITY ; MICROBIAL COMMUNITIES ; INNER-MONGOLIA ; WIND EROSION ; CHINA ; GRASSLANDS ; RECOVERY ; RESTORATION ; LAND ; MICROORGANISMS
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000288455300020
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556458
专题	寒区旱区环境与工程研究所
通讯作者	Li, Feng-Rui
作者单位	1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Linze Inland River Basin Res Stn, Lanzhou 730000, Peoples R China 2.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730020, Peoples R China 3.Alxa League Grassland Stn, Bayanhot 750306, Peoples R China 4.EH Graham Ctr Agr Innovat, Wagga Wagga, NSW 2650, Australia
推荐引用方式 GB/T 7714	Zhou, Zhi-Yu,Li, Feng-Rui,Chen, Shan-Ke,et al. Dynamics of vegetation and soil carbon and nitrogen accumulation over 26 years under controlled grazing in a desert shrubland[J]. PLANT AND SOIL,2011,341(1-2):257-268.
APA	Zhou, Zhi-Yu,Li, Feng-Rui,Chen, Shan-Ke,Zhang, Hong-Rong,&Li, Guangdi.(2011).Dynamics of vegetation and soil carbon and nitrogen accumulation over 26 years under controlled grazing in a desert shrubland.PLANT AND SOIL,341(1-2),257-268.
MLA	Zhou, Zhi-Yu,et al."Dynamics of vegetation and soil carbon and nitrogen accumulation over 26 years under controlled grazing in a desert shrubland".PLANT AND SOIL 341.1-2(2011):257-268.

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