Active organic carbon pool of coniferous and broad-leaved forest soils in the mountainous areas of Beijing

作     者：GENG Yu-qing YU Xin-xiao YUE Yong-jie LI Jin-hai ZHANG Guo-zhen 

作者机构：Key Laboratory of Soil and Water Conservation ＆ Desertification Combating of the Ministry of Education School of Soil and Wa- ter Conservation Beijing Forestry University Beijing 100083 P. R. China College of Forestry Inner Mongolia Agricultural University Hohhot 010019 P. R. China Prevention and Control Sand Office Beijing Municipal Bureau of Landscape and Forestry Beijing 100029 R R. China 

出 版 物：《Forestry Studies in China》 (中国林学（英文版）)

年 卷 期：2009年第11卷第4期

页      面：225-230页

学科分类：08[工学] 09[农学] 0903[农学-农业资源与环境] 0837[工学-安全科学与工程] 090301[农学-土壤学] 

基　　金：supported by the Forestry Non-profit Scientific Research Special Funding Project (Tech-nologies for the forest ecology system health mainte-nance and management in typical area) (200804022) the Project of Tree Water Consumption Based on Forest Ecosystem Research Station in Beijing Capital Circle Area 

主　　题：coniferous forest broad-leaved forest readily oxidizable carbon particulate organic carbon soil organic carbon density 

摘      要：In order to explore the effects of different forest types on active soil carbon pool, the amounts and density of soil organic carbon （SOC） were studied at different soil horizons under typical coniferous and broad-leaved forests in the mountainous area of Beijing. The results showed that the amount of total SOC, readily oxidizable carbon and particulate organic carbon decreased with increasing depths of soil horizons and the amounts at depths of 0-10 cm and 10-20 cm in broad-leaved forest was clearly higher than that in coniferous forests. The trend of a decrease in SOC density with increasing depth of the soil horizon was similar to that of the amount of SOC. However, no regular trend was found for SOC density at different depths between coniferous forest and broad-leaved forests. The ratio of readily oxidizable carbon to total amount of SOC ranged from 0.36-0.45 and the ratio of particulate organic carbon to total amount of SOC from 0.28-0.73; the ratios decreased with increasing depths of soil horizons. Active SOC was significantly correlated with total SOC; the relationship between readily oxidizable carbon and particulate organic carbon was significant. A broad-leaved forest may produce more SOC than a coniferous forest.