兴安落叶松林碳平衡和全球变化影响研究  

Carbon equilibrium in Larix gmelinii forest and impact of global change on it.

作　　者：蒋延玲[1] 周广胜[1] 

机构地区：[1]中国科学院植物研究所植被数量生态学开放研究实验室,北京100093

出　　处：《应用生态学报》2001年第4期481-484,共4页Chinese Journal of Applied Ecology

基　　金：国家重点基础研究发展规划项目 (G1 9990 4 340 7);中国科学院知识创新工程项目 (KSCX2 1 0 7);国家自然科学基金重点项目 (39370 1 1 0和498350 0 1 );国家自然科学基金资助项目 (4990 50 0 5 ;30 0 70 642 )

摘　　要：利用CENTURY模型模拟兴安落叶松林的C循环并探讨全球变化对其C循环的影响 .结果表明 ,兴安落叶松林是一个C汇 ,年净吸收C 2 .65t·hm-2 .气候变化和大气CO2 浓度增加将对北方森林的生长有利 ,使其净吸收C的能力增强 .温度上升 2℃时 ,兴安落叶松林的植物总生物量和生产力均增加 ,而土壤C含量降低 .降水减少 2 0 %比降水增加 2 0 %时其植物总生物量、生产力和土壤C含量变化的幅度大 ,说明温度是大兴安岭地区森林生长的主要限制因子 .In order to provide a methodological demonstration for the study of C cycle in forest,the CENTURY model was applied to simulate the C cycle in Larix gmelinii forest and to approach the impact of global change on it.The results showed that the Larix gmelinii forest served as a C sink, with an annual net absorption of 2.65t·hm -2 .Cimate change and increased atmospheric CO 2 concentration benefited for the net primary production (CNPP) and net C absorption capacity of forests in North China. When the atmospheric temperature was increased by 2℃,the gross biomass and NPP of Larix gmelinii forest increased, while soil C content decreased, and the variation of these three indices was bigger when the precipitation was decreased by 20% than increased by 20%, indicating that the limiting factor for the forest growth in this area is atmospheric temperature, while precipitation is abundant or even too much.

关 键 词：兴安落叶松林 C循环 全球变化 碳平衡 

分 类 号：S718.5[农业科学—林学]