六龜試驗林亞熱帶天然闊葉林地上部碳貯存量之估算

Aboveground Carbon Accumulation of Subtropical Natural Broadleaf Forests in the Liukuei Experimental Forest of Southern Taiwan

林國銓(Kuo-Chuan Lin) ； 杜清澤(Chin-Tzer Duh) ； 徐嘉君(Chia-Chun Hsu) ； 黃菊美(Chu-Mei Huang)

《國立臺灣大學生物資源暨農學院實驗林研究報告》 20卷3期 (2006/09) Pp. 153-164

https://doi.org/10.6542/EFNTU.200609_20(3).0001

摘要

以台灣南部林業試驗所六龜試驗林的亞熱帶天然闊葉林為對象，選擇鳳崗山的楠櫧林帶和多納的櫟過渡林帶雨林分，伐取樣木，以廻歸式法估算其生物量，再推估其碳累積量。結果顯示：兩地區喬木與灌木由樣木胸徑與植體各部位或總生物量所建立的自然對數迴歸式，皆呈顯著相關，且雨林分喬木和灌木可各以一組廻歸式估算。兩林分地上部總生物量分別為鳳崗山310±9 Mg ha^(-1)，多納395±120 Mg ha^(-1)。鳳崗山植體碳濃度範圍為48~51%，多納則為49~52%。兩林分地上部碳累積量分別為鳳崗山154±5 Mg ha^(-1)，多納199±60 Mg ha^(-1)，其中約96%集中在喬木。六龜地區楠櫧林帶和櫟過渡林帶的林分，碳累積量與熱帶闊葉林相近，但高於大多數溫帶闊葉林。以樣木平均值計算樹幹材積，再轉換成碳累積量的碳轉換係數，鳳崗山為0.51 (Mgm^(-3))，多納為0.41 (Mg m^(-3))，兩林分間有差異。

關鍵字

楠櫧林帶 ； 櫟過渡林帶 ； 自然對數迴歸式 ； 生物量 ； 碳轉換係數

並列摘要

The Liukuei Experimental Forest, managed by the Taiwan Forestry Research Institute, was a representing subtropical forest ecosystem in southern Taiwan. Aboveground carbon accumulation estimations were conducted for selected Lauraceae and Fagaceae association and intermediate Fagaceae association in Fengkangshan and Duonah Districts of the Forest. By cutting down sample trees, the biomass and carbon accumulation of the stand were estimated by regression method. Based on the natural logarithmic regressions established by sample trees and bushes, the biomass of each component and the total biomass of the trees and bushes were significantly related to the diameter at breast height (D.B.H.). In addition, the biomass of the trees and bushes at each stand can be estimated with a set of common regression equations. The estimated aboveground biomass was 310±9 and 395±120 Mg ha^(-1) for the Fengkangshan and Duonah stands, respectively. The carbon concentrations of plant components in the Fengkangshan and Duonah stands were 48-51% and 49-52%, respectively. The aboveground carbon storages of the stands, with 96% were concentrated in trees, were 154±5 and 199±60 Mg ha^(-1), respectively. The carbon storages in Lauraceae and Fagaceae association and intermediate Fagaceae association in the Liukuei Experimental Forest was similar to that in tropical broadleaf forests and higher than that in most temperate broadleaf forests. Estimated by stem volumes converted from averaged diameters of sample trees, significantly different carbon conversion coefficients were calculated as 0.51 and 0.41 (Mg m^(-3)) for Fengkangshan and Duonah stands, respectively.

並列關鍵字

Lauraceae and Fagaceae association ； intermediate Fagaceae association ； natural logarithmic regression equation ； biomass ； carbon conversion coefficient