文献类型：期刊文献

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

作者：Tong, Xiaojuan[1,2] Meng, Ping[1] Zhang, Jinsong[1] Li, Jun[3] Zheng, Ning[1] Huang, Hui[1]

第一作者：Tong, Xiaojuan

通信作者：Meng, P[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, State Forestry Adm, Beijing 100091, Peoples R China;[2]Beijing Forestry Univ, Minist Educ, Key Lab Silviculture & Conservat, Beijing 100083, Peoples R China;[3]Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China

年份：2012

卷号：49

起止页码：257-267

外文期刊名：ATMOSPHERIC ENVIRONMENT

收录：;EI(收录号：20120614749907);Scopus(收录号：2-s2.0-84856587554);WOS:【SCI-EXPANDED(收录号:WOS:000301553500029)】；

基金：This study was sponsored by Special Public Sector Research (GYHY200706046), the National Natural Science Foundation of China (31100322), the Fundamental Research Funds for the Central Universities (NO. YX2011-19), and the National Key technology R&D Program of China (2011BAD38B06). We also thank two anonymous reviewers for thoughtful suggestions.

语种：英文

外文关键词：Mixed plantation; Eddy covariance; Net ecosystem carbon exchange; Gross primary productivity; Ecosystem respiration

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 (A(max)) varied from 0.81 to 1.22 mg CO2 m(-2) s(-1) and annual initial light use efficiency (alpha) from 0.014 to 0.026. Net CO2 uptake was depressed when vapor pressure deficit (VPD) was more than 2.5 kPa. Annual temperature sensitivity coefficient (Q(10)) for ecosystem respiration, ranged from 1.84 to 2.35, was negatively correlated with base ecosystem respiration (R-0) (P < 0.05). Annual R-0 decreased but Q(10) increased evidently when winter drought occurred. From 2006 to 2010, annual net ecosystem carbon exchange (NEE), Gross primary productivity (GPP) and ecosystem respiration (R-ec) were -355 +/- 34, 1196 +/- 21 and 841 +/- 43 g C m(-2) yr(-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. (C) 2011 Elsevier Ltd. All rights reserved.