Application and Comparison of Methods for Estimating Carbon Stock in Above-ground Biomass of Tropical Rainforests in the North- Central Vietnam

• Method for estimating carbon stock in above-ground biomass through identification, measurement, and calculation using standard plots for tropical rainforests in this research report respects three fundamental characteristics of ecosystem: Diversity, uniqueness and local knowledge of the Human Ecology Practical Area (HEPA), based on the philosophy of Nurturing Ecosystem.
   
  Accordingly, criteria for the standard plot determination include: 1) Direction of Yang energy flows ;   2) terrain (elevation and slope); 3) spiritual belief of forest owners (world view on the ecosystem); 4) timber volume; 5) diameter class; and 6) species diversity. These six basic indicators are applied for calculation and comparative analysis as a fundamental criteria for this research.  
   
  The total calculated area is 310.7 ha with standard plots systematically set up according to direction, route, terrain and slope to ensure representativeness. The calculation formulas used and compared include: 1) Brown (1997), 2) Chave et al (2005), 3) Natural Resources Wales, and 4) Bao Huy (2012). The final formula chosen for calculation is Bao Huy (2012).
  
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