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Acta Prataculturae Sinica ›› 2009, Vol. 18 ›› Issue (2): 184-193.

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Review of soil respiration and the impact factors on grassland ecosystem

ZHOU Ping1,2, LIU Guo-bin1, XUE Sha1   

  1. 1.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,
    Northwest A&F University, Yangling 712100, China;
    2.Graduate School of
    Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-05-05 Online:2009-04-20 Published:2009-04-20

Abstract: Soil respiration plays an important part in the balance of the global carbon budget. This paper reviews the function of the global carbon balance, the classification of soil respiration, and the impact factors on grassland ecosystems. The ratios of each proportion of grassland ecosystem soil respiration differed because of different spatial and temporal scales. This respiration also responded differently to biotic, abiotic, and human activity factors. The abiotic impact factors included soil temperature (potentially important with climate warming), soil water content, precipitation, aridification and carbon/nitrogen elements. The biotic impact factors involved leaf area index, photosynthesis, litters, and human activities included land use change, grassland reclamation and fertilizer use. The Q10 of soil respiration, key controlling factors and interaction among different impact factors are discussed. In Conclusion, soil respiration of the grassland ecosystem is a complex biochemical process. The complex biochemical process is controlled by certain major factors and regulated by interactions among multi-factors. This summary, highlights existing problems of grassland ecosystem soil respiration and suggests future directions for progress together with some future topics for research.

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