RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2015, Vol. 24 >> Issue (05): 758-764.doi: 10.11870/cjlyzyyhj201505007

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BIOMASS MODEL AND CARBON STORAGE OF CHINESE FIR PLANTATION IN DABIESHAN MOUNTAINS IN ANHUI

SHI Wen-tao, XIE Xin-yun, LIU Xi-jun, ZHANG Chi, KE Li, XU Xiao-niu   

  1. School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China
  • Received:2014-04-14 Revised:2014-05-27 Online:2015-05-20
  • Contact: 徐小牛 E-mail:xnxu2007@ahau.edu.cn

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Abstract: In order to reveal the biomass allometry of Chinese fir plantation at high altitudes, an investigation was conducted in the Dabieshan Mountains in Anhui Province. A total of 23 sampling plots (20 m×20 m) was set up in Chinese fir plantations with different ages (10, 22, 45, 48 and 50 years old) and 18 trees with different diameters and heights were sampled for biomass measurement. A total of 7 biomass models were adopted to estimate the biomass of whole tree and organs with D, D2, DH and D2H, respectively for the independent variables. There were totally 35 biomass models fitted. The results showed that the power function models fitted the data best, but the polynomial models were poor. The optimal models for branch, trunk, roots and whole tree were power function models in the form of W=aDb. However, the optimal models for foliage was polynomial models in the form of W=a+bD2+cD4. The carbon concentrations in different organs varied from 46.64% to 53.13%. The carbon concentrations of over-matured stands (45-50 year-old) were ranked as order of bark > root > foliage > branch > trunk. The carbon concentration was higher in roots than in branches and foliage, while for the young- and middle-aged stands the carbon concentration was significantly lower in roots than in the aboveground organs. The carbon storage in different organs of Chinese fir was ordered as trunk > branch > root > foliage. The order of carbon storage for the over-matured stands by organs was trunk > root > branch > foliage. The biomass carbon storages in the above-mentioned Chinese fir stands ranged from 59.39 (10-year-old) to 201.25 (48-year-old) Mg C/hm2. In addition, our results demonstrated that the underground biomass and its carbon storage of Chinese fir plantation increased with the stand age, with a range of 14.84%-23.79% for the root biomass carbon storage to the stand total at this higher altitude. This suggests that the higher altitude environment tends to favor underground biomass accumulation of Chinese fir plantation, which can be important to increase soil organic carbon accumulation.

Key words: biomass allocation, biomass model, carbon storage, Chinese fir plantation, Dabieshan Mountains

CLC Number: 

  • S791.27
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