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

Abstract

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.Cimate 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℃,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.

Key words: Larix gmelinii forest, Carbon cycle, Global change

CLC Number:

P595
S718.5

JIANG Yanling, ZHOU Guangsheng . Carbon equilibrium in Larix gmelinii forest and impact of global change on it[J]. Chinese Journal of Applied Ecology, 2001, (4): 481-484.

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