中文摘要：

利用GLOPEM-CEVSA模型模拟并分析了中国东北地区2000-2008年植被净初级生产力（NPP）时空分布格局及其影响因素,并以4个森林生态站点（大兴安岭、老爷岭、凉水和长白山森林生态站）为例研究了东北地区森林NPP季节变化特征及其环境驱动.结果表明：2000-2008年,东北地区植被年均NPP为445 g C.m-2.a-1;整个研究区沿长白山山脉到小兴安岭山脉地区以及三江平原部分地区的NPP最高,沿长白山山脉到小兴安岭山脉西侧的辽河平原、松嫩平原东部、三江平原和大兴安岭地区次之,西部稀疏草原和荒漠地区的NPP最低.东北地区森林生态系统年均NPP最高,其次为灌丛、农田和草地,荒漠最低.森林生态系统中,针阔混交林年均NPP最大（722 g C.m-2.a-1）,落叶针叶林年均NPP最小（451 g C.m-2.a-1）.研究期间,森林NPP无显著年际变化,其中2007、2008年较往年NPP大幅增加,很可能与该地区期间气温上升有关（较往年偏高1℃～2℃）.东北地区森林自北向南生长季开始时间逐渐提前,生长季变长.

英文摘要：

By using GLOPEM-CEVSA model,the spatiotemporal pattern and its affecting factors of the vegetation net primary productivity（NPP） in Northeast China in 2000-2008 were simulated,and,taking four forest ecosystem stations（Daxing＇anling,Laoyeling,Liangshui and Changbai Mountains） as the cases,the seasonal changes and their main driving force of forest NPP in Northeast China were studied.In 2000-2008,the annual averaged vegetation NPP in the region was 445 g C·m-2·a-1,being the highest in the areas from Changbai Mountains to Xiaoxing＇anling Mountains and parts of Sanjiang Plain,followed by in the areas from Changbai Mountains to Liaohe River Plain,eastern Songnen Plain,Sanjiang Plain,and Daxing＇anling Mountain,and the lowest in the sparse grass and desert areas in the west.Forest ecosystem had the highest annual averaged NPP,followed by shrub,cropland and grassland,and desert.In forest ecosystem,coniferous and broad-leaf mixed forests had the highest annual averaged NPP（722 g C·m-2·a-1）,while deciduous needle-leaf forest had the lowest one（451 g C·m-2·a-1）.During the study period,no significant inter-annual changes were observed in the forest NPP though it was higher in 2007 and 2008 probably due to the increased air temperature（1 ℃-2 ℃ higher than that in other years）.The beginning time of forest growth season in Northeast China advanced gradually from north to south,and the growth season became longer.