Effects of forest tending management strategies on carbon storage (1/3)

The purpose of this study is to explore the biomass and carbon storage of Taiwan cypress (Chameacyparis formosensis) and Taiwania trees (Taiwania cryptomerioides) grown with different silvicultural treatments in built permanent plots. The growth characteristics and mortality of trees from plots are investigated. Fifty sample trees are felled for stem analysis and surveying biomass for each species. The DBH, tree height, volume and biomass of stem, branch, and leaf of sampled trees are measured and investigated. Moreover, an increment borer was used to cut cores from trees. The bulk density and ring characteristics of sampled cores are investigated by time sequence method and soft x-ray densitometer techniques. The biomass and carbon storage are calculated from the tree growth and ring density characteristics. The applicable forest management could be analyzed and decided by evaluating the biomass and carbon storage of Taiwan cypress and Taiwania trees grown in different silvicultural regimes. The appropriate strategies of management that include thinning stand age, stand density, thinning time, interval of thinning treatments, utilization of thinned wood, and rotation, etc. are very important and assessed.本研究旨在探究不同营林措施下，于设置的永久样地中栽植的台湾扁柏（Chamaecyparis formosensis）与台湾杉（Taiwania cryptomerioides）的生物量与碳储量。本研究对各样地内林木的生长特征及死亡率展开调查。针对每个树种，选取50株标准木进行伐倒木茎干分析并测定生物量。测定指标涵盖样木的胸径（DBH）、树高、材积，以及茎干、枝条与叶片的生物量。此外，采用生长锥（increment borer）从林木中钻取木芯，通过时序法与软X射线密度计（soft x-ray densitometer）技术，对样木木芯的容重与年轮特征进行测定。基于树木生长与年轮密度特征，计算得到林木的生物量与碳储量。通过评估不同营林制度下台湾扁柏与台湾杉的生物量与碳储量，可分析并确定适配的森林经营方案。诸如间伐林分年龄、林分密度、间伐时间、间伐间隔期、抚育材利用方式及轮伐期等在内的适宜经营策略至关重要，本研究亦对其进行了评估。