| Summary: | 碩士 === 國立中興大學 === 森林學系所 === 94 === The purpose of this study was to discuss carbon storage of Chamaecyparis formosensis and Cryptomeria japonica.var. japonica The Chamaecyparis formosensis plantation of study area located in no. 121 and 123 compartment of Da-An Shi working circle. The Cryptomeria japonica plantation of study area located in the central part of Taiwan, at compartment no.74, Luan-Da working circle. Data of this study were collected from 20 sample trees. Two-way ANOVA was used to analyze percentage of carbon storage in diameter classes and parts (stem, branch, foliage, and bark) of trees. Mathematical functions were applied to estimate relationships between carbon storage of trees and other variables. The results show: (1) All trees in different diameter classes were near 50 % of carbon storage, foliage＞stem＞branch＞bark in part of trees. Carbon storage of Cryptomeria japonica stem was between 48.91-49.79 %, branch was between 46.67-47.83 %, foliage was between 49.58-50.92 %, and bark was between 47.04-47.64 %. Carbon storage of Carbon storage of Cryptomeria japonica stem was between 48.91-49.79 %, branch was between 46.67-47.83 %, foliage was between 49.58-50.92 %, and bark was between 47.04-47.64 %. Carbon storage of Chamaecyparis formosensis stem was between 47.91-49.76%, branch was between 46.45-47.10 %, foliage was between 48.43-48.87 %, and bark was between 46.40-47.53 %. (2) Some mathematical functions were established in this study, which could estimate carbon storage of trees aboveground by DBH, age or volumes of trees. (3) The estimated carbon storage of trees aboveground were near 54.23 kg tree-1 Chamaecyparis formosensis and 86.56 kg tree-1 in Cryptomeria japonica. (4) The estimated carbon storage of Da-An Shi working circle were 57.02~114.04 ton/ha and Luan-Da working circle were 241.75 ton/ha. And the carbon storage was still increment with DBH.
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