台灣平地土壤碳庫存之評估

Estimation of Soil Carbon Stock in Taiwan Flatland Soil

10.6499/JSGR.202312_8(2).0002

李依庭(Yi-Ting Lee)；賴允傑(Yun-Jie Lai)；盧逸(Yi Lu)；陳尊賢(Zueng-Sang Chen)；許正一(Zeng-Yei Hseu)；蔡呈奇(Chen-Chi Tsai)；劉瑞祥(Jui-Hsiang Liu)；王禎(Chen Wang)；陳以新(I-Hsin Chen)；詹皓凱(Hao-Kai Chan)

土壤碳庫存 ； 土壤碳匯 ； 平地 ； 代表性土系 ； 土壤調查 ； soil carbon stock ； soil sink ； flatland ； representative soil series ； soil survey

土壤及地下水污染整治

8卷2期（2023 / 12 / 01）

73 - 94

繁體中文;英文

近年來為因應全球關注之氣候變遷減緩調適及淨零排放等議題，國內各有關單位均已著手盤點可提供固碳功能之土地面積及可行之技術方法。由於土壤土綱分類方式係以土壤化育形態學為基礎，故屬同分類群之土系應具有相近之土壤性質及土壤碳庫存量。本文運用環境部於2013～2021年間辦理之全台平地代表性土系土壤剖面調查成果，計算已調查土系土壤之單位面積土壤碳庫存量，並將計算結果正規化轉換為一致之土壤深度區間，再乘以該土綱在全台平地所占有之面積，推算我國平地土壤總碳庫存量約為47.54 Tg（Tg = 10^(12) g），其中以分布面積最廣之新成土和弱育土之貢獻量為最高，合計約41.19 Tg，所占比例約為86.7%，其次為極育土（8.48%）、淋餘土（2.86%）、氧化土（1.50%）和黑沃土（0.51%），最後為分布面積最小之膨轉土（<0.01%）。

In response to climate change mitigation and adaptation, as well as the goal of achieving net-zero carbon emissions, various agencies in Taiwan have begun inventorying carbon-storing land areas and developing technical methods. Considering that soil classification is based on soil morphology, suggesting that soil series within the same classification group share similar soil properties and carbon stock levels, the study presented used data from the Ministry of the Environment's survey of representative soil series spanning from 2013 to 2021. To calculate the carbon stock, we initially determined the carbon stock per unit area of the surveyed soil series, and then standardized the results into consistent intervals based on soil depth. By multiplying these standardized results by the area occupied by each soil order in Taiwan's flatlands, the total carbon stock of flatland soils in Taiwan is estimated to be 47.54 Tg (Tg = 10^(12) g). Entisols and Inceptisols make the most significant contributions, accounting for approximately 41.19 Tg, or 86.7% of the total carbon stock, and are widely distributed in Taiwan, followed by Ultisols (8.48%), Alfisols (2.86%), Oxisols (1.50%), and Mollisols (0.51%). Finally, Vertisols, with the smallest distribution area, accounted for less than 0.01% of the total carbon stock.