Ecosystem carbon exchange over a warm-temperate mixed plantation in the lithoid hilly area of the North China

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 历年回溯文献

	Ecosystem carbon exchange over a warm-temperate mixed plantation in the lithoid hilly area of the North China
	Li Jun
	2012
关键词	Ecosystems Carbon dioxide Drought Plants (botany) Reforestation Revegetation
英文摘要	In recent decades, forest area in China increased rapidly by afforestation and reforestation, especially in its temperate parts. However, lack of information on carbon exchange in temperate plantations in China reduced the accuracy of estimation on regional carbon budget. In this study, CO2 flux was measured using the eddy covariance method over a broadleaf dominant mixed plantation in the lithoid hilly area of the North China. The results showed that annual maximum photosynthetic capacity (Amax) varied from 0.81 to 1.22mgCO2m-2s-1 and annual initial light use efficiency () from 0.014 to 0.026. Net CO2 uptake was depressed when vapor pressure deficit (VPD) was more than 2.5kPa. Annual temperature sensitivity coefficient (Q10) for ecosystem respiration, ranged from 1.84 to 2.35, was negatively correlated with base ecosystem respiration (R0) (P0.05). Annual R0 decreased but Q10 increased evidently when winter drought occurred. From 2006 to 2010, annual net ecosystem carbon exchange (NEE), Gross primary productivity (GPP) and ecosystem respiration (Rec) were -35534, 119621 and 84143gCm-2yr-1, respectively. The warm-temperate mixed plantation in the lithoid hilly area of the North China was a strong carbon sink of the atmosphere, which was usually weaken when spring drought happened. 2011 Elsevier Ltd.
出处	Atmospheric Environment
卷	49 页:257-267
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/27678]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Li Jun. Ecosystem carbon exchange over a warm-temperate mixed plantation in the lithoid hilly area of the North China. 2012.