惠蓀林場香杉人工林樹高曲線式、材積式及地上部生物量模式之建立及應用於林分碳貯存量之推估

Development of tree height, volume and aboveground biomass equations to predict carbon storage for a Konishi fir (Cunninghamia konishii) plantation in Huisun Experimental Forest Station

香杉（Cunninghamia konishii）為臺灣重要原生樹種，具高經濟及生態價值，然而以往的研究較少探討此樹種之碳貯存能力。本研究以臺灣中部惠蓀林場香杉人工林為研究對象，目的在於發展樹高曲線式、材積式及地上部生物量模式，將其應用於推估林分之蓄積量。樣木選取後進行伐採以建立上述模式，模式建立完成後用以推估林分材積量、地上部生物量及碳貯存量。結果所得之林分蓄積量為580.9 m^3 ha^(-1)，換算為年平均生長量為11.0 m^3 ha^(-1) yr^(-1)；地上部生物量及碳貯存量分別為271.15和135.58 Mg ha^(-1)，根據地上部碳貯存量，換算為年平均碳吸存量為2.56 Mg ha^(-1) yr^(-1)。此外，本研究也分析此樹種之胸高形數及材積轉換地上部碳貯存量係數，其值分別為0.352和228.40 kg m^(-3)。本研究所得之結果將可提供香杉人工林生產力和碳貯存能力的具體資訊。

Konishii fir (Cunninghamia konishii) is one of the important native conifers in Taiwan. Although it has high economic and ecological values, its contribution in carbon storage was rarly evaluated. A Konishi fir plantation in Huisun Experimental Forest Station of central Taiwan was conducted on this study. Some standing trees were sampled and felled to develop tree height, volume and aboveground biomass equations. These equations were then used to predict volume, aboveground biomass and carbon storage. The volume of this plantation was predicted to be 580.9 m^3 ha^(-1), indicating that the mean annual increment was 11.0 m^3 ha^(-1) yr^(-1). The aboveground biomass and carbon storage were predicted to be 271.15 and 135.58 Mg ha^(-1), respectively. According to the aboveground carbon storage, the mean annual carbon sequestration was calculated to be 2.56 Mg ha^(-1) yr^(-1). On the other hand, the breast height form factor and transformation coefficient between the volume and aboveground carbon storage were predicted for this species where the former was 0.352 and the latter was 228.40 kg m^(-3), repectivly. Our results provide a comprehensive information for Konishi fir plantations in productivity and carbon storage capacity.