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STUDIES ON THE DYNAMIC CHANGE OF THE COMMERCIAL BIOMASSOF MASSON PINE PULPWOOD STANDS AND ITS MODELING

Ding Guijie Wang Pengcheng Yang Renfa(Department of planting and ecology, Guizhou Agricultural College Guiyang550025)  
お? In order to forecast commercial biomass of the Masson pine pulpwood and determine optimum utilization time accurately, the commercial biomass forecast equations of various organs, above ground parts, various specifications of individual tree were established using the data of 12 sample plots and 108 sample trees on various sites, various planting densities, and at various stand ages. Growth yield model system was established using data of various trial stands and stem analysis. The forecast result of biomass and stand growth by the equations was consistent with the actual situation. According to the forecast equations of biomass and stand growth, commercial timber yield table of main stand factors, stand stem and various specifications had been compiled, which were at 6 planting densities and 14~20 site indexes. According to the demand of utilization unit, the management unit may regulate the planting density, management manner and optimum utilization time. Dynamic of biomass growth and structure of Masson pine pulp wood on various sites and various planting densities were analysed.
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