应用生态学报2011，Vol.22Issue(1)：1-8,8.
帽儿山地区落叶松人工林CO2通量特征及对林分碳收支的影响
CO2 flux characteristics and their influence on the carbon budget of a larch plantation in Maoershan region of Northeast China
摘要
Abstract
From January to December 2008, the CO2 flux in a larch plantation ( Larix gmeilinii) in Maoershan region of Shangzhi County, Heilongjiang Province was measured by eddy covariance method, and the diurnal changes of leaf photosynthetic rate were measured in growth season ( from May to October). There existed differences in the net ecosystem exchange (NEE) of the plantation in different time periods under the effects of environmental factors. In the afternoon ( 12:00-24:00), the NEE changed more slowly with the variation of vapor pressure deficit (VPD) than in the morning (0:00-12:00); and in the morning, the light use efficiency was 0. 6284 mol · mol-1,14％ more than that in afternoon. The NEE increased with increasing temperature, and the increment in the morning was 50％ higher than that in the afternoon ( air temperature ＞ 15 ℃ ). These differences in responding to environmental changes led to 88％ NEE implemented in the morning,and only 12％ NEE implemented in the afternoon. The annual gross ecosystem productivity (GEP)in the morning took a percentage of 60％, and that in afternoon took 40％. These findings were supported by the observation at leaf level, i. e. , on average of whole growth season, the leaf photosynthetic capacity in the morning was over 2-fold higher than that in afternoon. Generally, the annum NEE, ecosystem respiration (Re ), and GEP of the plantation in 2008 were 263-264 g C·m-2, 718-725 g C · m-2, and 981-989 g C · m-2, respectively.关键词
兴安落叶松/涡度协方差法/碳收支/叶片光合作用分类
农业科技引用本文复制引用
邱岭,祖元刚,王文杰,孙伟,苏冬雪,郑广宇..帽儿山地区落叶松人工林CO2通量特征及对林分碳收支的影响[J].应用生态学报,2011,22(1):1-8,8.基金项目
国家自然科学基金项目(30771698,40873063)、中央高校基本科研业务费专项资金项目(DL09CA17)和黑龙江省博士后特别项目资助. （30771698,40873063）
