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.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2010年第3期161-165,共5页
Scientia Silvae Sinicae
基金
国家自然科学基金(40601102)
关键词
岳桦
非结构性碳水化合物
树木线
长白山
Betula ermanii
nonstructural carbohydrates
timberline
Changbai Mountain
