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IMPACTS OF GRAZING INTENSITY ON NITROGEN POOLS AND NITROGEN CYCLE IN AN ALPINE MEADOW ON THE EASTERN TIBETAN PLATEAU
Gao, Y. H.1; Luo, P.2; Wu, N.2; Chen, H.2; Wang, G. X.1
Corresponding AuthorWu, N.
2008
Source PublicationAPPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH
ISSN1589-1623
EISSN1785-0037
Volume6Issue:3Pages:69-79
SubtypeArticle
AbstractGrazers may influence nitrogen (N) pools and alter N inputs and outputs (losses) to the ecosystem in a number of ways. In this study, we evaluated N pools within the plant-soil system (0-30 cm) and soil N transformation under three different grazing intensities by yaks (light: 1.2, moderate: 2.0, and heavy: 2.9 yaks ha(-1)) in an alpine meadow on the eastern Tibetan Plateau. Total plant and soil N at 030 cm depth tended to increase as grazing intensity increasing (plant N: 26.6, 31.4 and 36.7 g m(-2); soil N: 905, 939 and 1125 g m(-2) for light, moderate and heavy grazing, respectively). Soil N transformation rates, such as net N mineralization, gross nitrification, denitrification and N2O emissions, generally increased under heavy grazing intensity. Results indicate that heavy grazing intensity accelerated the N cycling rates between system components and leaded to increases in plant-soil system N in this alpine meadow.
KeywordBiomass Grassland n Stocks Soil n Transformation Tibet Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordYELLOWSTONE-NATIONAL-PARK ; SOIL CARBON ; GRASSLAND ; DEFOLIATION ; NITRIFICATION ; ALLOCATION ; HERBIVORY ; ECOSYSTEM ; DYNAMICS ; DENITRIFICATION
Language英语
WOS SubjectEcology ; Environmental Sciences
WOS IDWOS:000265576400006
Funding OrganizationNational "10th Five-year Plan" of China(2001BA606A-05) ; National Natural Science Foundation of China(90511003) ; Chinese Academy of Sciences(KSCXI-07 ; Youth Sci & Tech Foundation of Sichuan, China(03ZQ026-043) ; KSCX2-01-09)
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Cited Times:31[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/10541
Collection成都山地所知识仓储(2009年以前)
山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Minist Water Resources, Chengdu 610041, Sichuan Prov, Peoples R China
2.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Sichuan Prov, Peoples R China
Recommended Citation
GB/T 7714
Gao, Y. H.,Luo, P.,Wu, N.,et al. IMPACTS OF GRAZING INTENSITY ON NITROGEN POOLS AND NITROGEN CYCLE IN AN ALPINE MEADOW ON THE EASTERN TIBETAN PLATEAU[J]. APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH,2008,6(3):69-79.
APA Gao, Y. H.,Luo, P.,Wu, N.,Chen, H.,&Wang, G. X..(2008).IMPACTS OF GRAZING INTENSITY ON NITROGEN POOLS AND NITROGEN CYCLE IN AN ALPINE MEADOW ON THE EASTERN TIBETAN PLATEAU.APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH,6(3),69-79.
MLA Gao, Y. H.,et al."IMPACTS OF GRAZING INTENSITY ON NITROGEN POOLS AND NITROGEN CYCLE IN AN ALPINE MEADOW ON THE EASTERN TIBETAN PLATEAU".APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 6.3(2008):69-79.
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