长白山岳桦体内碳素供应状况  

Carbon Supply Status in the Betula ermanii in Changbai Mountain

作　　者：周永斌[1] 吴栋栋[1] 于大炮[2] 

机构地区：[1]沈阳农业大学林学院,沈阳110161 [2]中国科学院沈阳应用生态研究所,沈阳110016

出　　处：《林业科学》2010年第3期161-165,共5页Scientia Silvae Sinicae

基　　金：国家自然科学基金(40601102)

摘　　要：低温条件常常驱动的碳缺乏导致高海拔处植物生长缓慢,生长季的高寒低温更是限制高海拔地区树木向上分布的关键因素之一。高海拔地区的不利环境限制了林木的分布，从而形成各种森林分布的界限，The experimental sites were set on the north slope of Changbai Mountain. This paper investigated the tissue non-structural carbohydrates （NSC） content of Betula ermanii at the different elevations up to timberline during the growing season. The results indicated that the overall altitudinal trends of NSC in the Betula ermanii were increasing along elevation gradients,and no depletion of carbon reserves was found near the tree limit,suggesting that sink limitation determines woody plant life across this timberline ecotone community. The results also suggest that the stronger frost resistance of the plants located at a timberline elevation would be associated with their stronger synthesis of the carbohydrates.

关 键 词：岳桦 非结构性碳水化合物 树木线 长白山 

分 类 号：S718.43[农业科学—林学]