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[1]DU Baohong,GAO Cuiping,Hadachaolu.Effect of Grazing on Plant Biomass and Carbon Storage of Typical Grassland in Xilinguole[J].Research of Soil and Water Conservation,2018,25(01):139-146,152.

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Effect of Grazing on Plant Biomass and Carbon Storage of Typical Grassland in Xilinguole

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 01 Page number: 139-146,152 Column: Public date: 2018-02-28

Title:: Effect of Grazing on Plant Biomass and Carbon Storage of Typical Grassland in Xilinguole

Author(s):: DU Baohong¹, GAO Cuiping², Hadachaolu²; 1. Xilingol Vocational College, Xilingol, Inner Mongolia 026000, China;
2. Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010011, China

Keywords:: grazing; typical grassland; plant biomass; carbon storage

CLC:: S812

DOI:: -

Abstract:: Plant biomass and carbon storage of typical grassland in Xilinguole after different grazing intensities (NG, no grazing; LG, light grazing; MG, moderate grazing; HG, heavy grazing) disturbance were studied. The results were as follows. Species richness, evenness, diversity, and dominance significantly reduced with the increase of grazing intensities with the order:NG > LG > MG > HG. The aboveground biomass and litter gradually reduced with the increase of grazing intensities with the order:NG > LG > MG > HG, meaning that grazing intensity reduced plant carbon storage. The root carbon storage gradually reduced with soil depth, which showed the order:NG > LG > MG > HG in 0—60 cm depth, and the effect of grazing intensity on root carbon storage is significant in 0—20 cm soil layer. The content of soil organic carbon decreased progressively with soil depth and showed the enrichment in surface soil layer where the ‘surface accumulation’ was obvious, while below 40 cm soil layer, there was no significant difference, and the soil carbon storage decreased in the order:MG > LG > NG > HG, which showed moderate grazing was benefit to soil organic carbon accumulation, while heavy grazing would decrease soil organic carbon accumulation. We can conclude that soil carbon storage was the main part of ecosystem with 80% of carbon storage, all parts of carbon storage decreased in the order:soil > root > aboveground > litter. There was significant correlation between plant carbon storage and soil carbon storage in 0—20 cm soil layer (p < 0.05), and soil carbon storage had a good relationship with soil depth.

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