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兴安落叶松林碳平衡和全球变化影响研究
引用本文:蒋延玲,周广胜.兴安落叶松林碳平衡和全球变化影响研究[J].应用生态学报,2001,12(4):481-484.
作者姓名:蒋延玲  周广胜
作者单位:[1]中国科学院植物研究所植物被数量生态开放研究实验室,北京100093 [2]中国科学院植物研究所植物被数量生态开放研
基金项目:国家重点基础研究发展规划项目(G1999043407)、中国科学院知识创新工程项目(KSCX2-1-07)和国家自然科学基金重点项目(39370110和49835001)及国家自然科学基金资助项目(49905005,30070642).2000-12-0l收稿2001-02-13修稿
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C2.65t.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20%比降水增加20%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。

关 键 词:兴安落叶松林  C循环  全球变化  碳平衡
文章编号:1001-9332(2001)04-0481-04

Carbon equilibrium in Larix gmelinii forest and impact of global change on it.
JIANG Yanling,ZHOU Guangsheng.Carbon equilibrium in Larix gmelinii forest and impact of global change on it.[J].Chinese Journal of Applied Ecology,2001,12(4):481-484.
Authors:JIANG Yanling  ZHOU Guangsheng
Institution:Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093. yljiang@ns.ibcas.ac.cn
Abstract: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. Climate change and increased atmospheric CO2 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 degrees C, 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.
Keywords:Larix gmelinii  forest  Carbon cycle  Global change    
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