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Grazing intensity impacts soil carbon and nitrogen storage of continental steppe
He, N. P.1,2; Zhang, Y. H.2,3; Yu, Q.2; Chen, Q. S.2; Pan, Q. M.2; Zhang, G. M.2; Han, X. G.2
2011
Source PublicationECOSPHERE
Volume2Issue:1
AbstractRecent studies have underscored the importance of grasslands as potential carbon (C) sinks. We performed a grazing experiment with seven stocking rates (SR0, SR1.5, SR3.0, SR4.5, SR6.0, SR7.5, and SR9.0 for 0, 1.5, 3.0, 4.5, 6.0, 7.5, and 9.0 sheep ha(-1), respectively) to investigate the effect of increasing grazing pressure on soil C and nitrogen (N) storage in the temperate grasslands of northern China. The results revealed that C and N storage in both 0-10 cm and 10-30 cm soil layers decreased linearly with increasing stocking rates. Carbon storage in the 0-10 cm soil layer was significantly higher in lightly grazed grasslands than in heavily grazed grasslands after a 5-yr grazing treatment. Our findings suggest an underlying transformation from soil C sequestration under light grazing to C loss under heavy grazing, and that the threshold for this transformation is 4.5 sheep ha(-1) (grazing period from June to September). Results confirmed that grasslands used for grazing in northern China have the capacity to sequester C in the soil under appropriate grazing pressure, but that they lose C under heavy grazing. Therefore, appropriate grazer densities will promote soil C sequestration in the grasslands of northern China.
SubtypeArticle
KeywordCarbon Carbon Sequestration Carbon Storage Grassland Grazing Nitrogen Soil Fraction
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
Language英语
WOS SubjectEcology
WOS IDWOS:000208836100007
PublisherECOLOGICAL SOC AMER
Citation statistics
Cited Times:37[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68144
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHe, N. P.
Affiliation1.Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
He, N. P.,Zhang, Y. H.,Yu, Q.,et al. Grazing intensity impacts soil carbon and nitrogen storage of continental steppe[J]. ECOSPHERE,2011,2(1).
APA He, N. P..,Zhang, Y. H..,Yu, Q..,Chen, Q. S..,Pan, Q. M..,...&Han, X. G..(2011).Grazing intensity impacts soil carbon and nitrogen storage of continental steppe.ECOSPHERE,2(1).
MLA He, N. P.,et al."Grazing intensity impacts soil carbon and nitrogen storage of continental steppe".ECOSPHERE 2.1(2011).
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