臺灣東部闊葉樹造林地土壤與腐植質碳含量之比較－蓮平地造林地為例

在全球暖化議題上，造林有助於土壤碳的蓄存，不同樹種造林地土壤有機碳含量在森林經營管理上極其重要意義。本研究目的在比較臺灣東部闊葉樹造林地造林10年後土壤及腐植質有機碳含量。結果顯示表土有機碳含量平均為77.23C-g kg^(-1) soil，有機碳含量依序為臺灣棒（57.63）、烏心石（68.05）、楓香（72.32）、苦棟（77.63）、光臘樹（91.49）及樟樹（96.27），土壤有機碳含量在不同樹種造林地並沒有顯著差異（p＞0.01）。土壤有機碳含量主受扮粒及黏粒含量所影響，扮粒及黏粒含量越高時，土壤有機碳含量也隨之增加（r^2=0.34, F=8.05, n=18）。土壤有機碳含量與腐植酸（r=0.79＊＊）及腐植素（r=0.76＊＊）呈顯著正相關，而與黃酸無顯著關餘，土壤腐植物質主要以腐植酸的形式蓄存（佔71%）。

關鍵字

造林；腐植質；土壤有機碳含量；樹種

並列摘要

It is beneficial to have carbon sequestration through the plantation due to global warming. It is very important to have appropriate amount of soil organic carbon content resulting from different tree species plantations in the field of forest management. The aim of the study is to compare the topsoil (0~15 cm) organic carbon content of soil and humic substances of afforestation by different plantations (10-years) of Eastern Taiwan. The results showed that there was no significant differences in soil organic carbon by different plantations (＂p＂＞0.01) and the mean soil organic content was about 77.23 C-g kg^(-1) soil; the organic carbon content of the topsoil by different plantations have the following tendency Camphor tree (96.27), Formosan ash (91.49), Bead tree (77.63), Formosan sweet gum (72.32), Formosan michelia (68.05) and Taiwan zelkova (57.63) C-g kg＂ soil. The soil organic carbon were mostly affected by soil clay&silt and it increased along with the content (r^2=0.34, F=8.05*, n=18). There was a significantly positive relationship between soil organic carbon with humic acid (r=0.79**) and humin (r=0.76**); the humic substances' carbon content was presented in the HA (71%) mainly.

並列關鍵字

Afforestation ； Humic subatances ； Soil organic carbon ； Tree species

國際替代計量

臺灣東部闊葉樹造林地土壤與腐植質碳含量之比較－蓮平地造林地為例

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