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Forest and Grassland Resources Research ›› 2025›› Issue (2): 56-67.doi: 10.13466/j.cnki.lczyyj.2025.02.006

• Research paper • Previous Articles     Next Articles

Characteristics of grassland biomass carbon density and carbon storage in nature reserve in Xizang

WU Jianguo1,2(), WANG Siyu1,2, LIU Weiwei2,3, DUAN Min3, HE kai3, GERONG Duoji3, DANZEN Zhuoga3   

  1. 1. Key Laboratory of Ecological Process and Function Assessment in Regional Ecosystem,Ministry of Ecology and Environment,Beijing 100012,China
    2. Institute of Ecology,Chinese Research Academy of Environmental Sciences,Beijing 100012,China
    3. Xizang Academy of Ecological and Environmental Sciences,Lhasa 850000,China
  • Received:2024-10-26 Revised:2025-03-10 Online:2025-04-28 Published:2025-12-04

Abstract:

Investigating the vegetation biomass carbon density and storage characteristics in nature reserves is important for scientific understanding of the impacts of nature reserves on ecosystem carbon sink function.The 21 nature reserves with large land and grassland distribution area in Xizang were selected.Based on the survey data of grassland resources in Xizang published in 2018 and the survey of typical protected areas in 2024,the calculation method of grassland biomass carbon density and storage of the United Nations Intergovernmental Panel on Climate Change was adopted,the carbon density and storage characteristics of vegetation biomass of 17 grassland types in 21 nature reserves were analyzed.The results showed that the aboveground,underground and total biomass carbon densities of grassland vegetation in 21 nature reserves in Xizang were 0.062-0.130,0.430-4.110 and 0.460-4.580 t/hm2,respectively.The highest carbon density of aboveground and underground biomass was found in the bog of Bangongcuo Wetland Nature Reserve(1.38 t/hm2 for aboveground,21.64 t/hm2 for underground).The highest biomass carbon density was found in the alpine grassland of Bangongcuo Wetland Nature Reserve(0.27 t/hm2).In addition,the aboveground,underground and total biomass carbon reserves of grassland vegetation in 21 nature reserves in Xizang were 0.000 60×105-16.159 18×105,0.005 19×105-110.992 73×105,and 0.005 79×105-127.151 90×105 t,respectively.The aboveground biomass carbon storage of vegetation was the highest in alpine grassland(7.152 88×105t) and alpine meadow(6.650 52×105 t) in Qiangtang National Nature Reserve.The underground biomass carbon storage was the largest in the alpine grassland(30.399 76×105t) and alpine meadow(61.982 86×105 t) of Qiangtang National Nature Reserve.The highest biomass carbon storage was found in alpine grassland(37.552 64×105 t) and alpine meadow(68.633 38×105 t) in Qiangtang National Nature Reserve.The results show that grassland vegetation in Xizang Nature Reserve has an important carbon sink function,and it is necessary to strengthen the protection of vegetation carbon pool in these reserves.

Key words: nature reserve, vegetation, carbon storage, Xizang

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