应用生态学报2018，Vol.29Issue(3)：775-782,8.DOI:10.13287/j.1001-9332.201803.005
云南普洱季风常绿阔叶林不同林层非结构性碳水化合物特征
Non-structural carbohydrates characteristics of different forest layers in monsoon broadleaved evergreen forest in Pu'er,Yunnan Province,China
摘要
Abstract
Based on cluster analysis of species vertical stratification,the variations in concentration,allocation and seasonal dynamics of non-structural carbohydrates were investigated in a monsoon broad-leaved evergreen forest in Pu'er,Yunnan Province. The results showed that the concentrations of soluble sugar (3.9％) and nonstructural carbohydrates (NSC,13.3％) were the highest in the sub-canopy. In contrast,the sugar /starch (0.76) of understory was the lowest. There was no significant difference in starch content among three forest layers. For all forest stories,the soluble sugar was mainly allocated to leaves and the roots had more starch and NSC. The soluble sugar contents in leaves and trunks of sub-canopy species were higher than canopy and understory species. There were no significant differences in soluble sugar content of twigs and roots among three different forest layers. The starch content of leaves increased with decreasing height of forest layers. In contrast,the lowest starch content (10.7％) of roots was in understory. There was no significant difference in starch content of twigs and trunks among three different forest layers. The NSC content of leaves was lower in canopy (10. 7％) than that in sub-canopy (12. 3％) and understory(12.0％). The lowest NSC content of roots was in understory (14.2％). The lowest sugar /starch of leaves,twigs,and trunks presented in understory,while the lowest sugar /starch of roots presented in canopy (0. 79). There were dramatic seasonal variations in concentrations and components of NSC. The concentration of soluble sugar and the sugar /starch were higher in the rainy season than that in the dry season. However,the concentration of starch and NSC were higher in the dry season than in the rainy season. The variations in concentration of NSC and its components among forest layers indicated that species with different heights varied in their utilization strategies of carbon,which partly explained species coexistence.关键词
非结构性碳水化合物/林层/季节动态/季风常绿阔叶林Key words
non-structural carbohydrate/forest layer/seasonal dynamic/monsoon broad-leaved evergreen forest引用本文复制引用
刘万德,苏建荣,李帅锋,徐崇华,郎学东,黄小波,钟华..云南普洱季风常绿阔叶林不同林层非结构性碳水化合物特征[J].应用生态学报,2018,29(3):775-782,8.基金项目
本文由国家重点研发项目(2016YFC0503103,2017YFC0505005)、国家自然科学基金项目(31370592,31200461)、林业公益性行业专项(201404211)和云南省科技人才和平台计划项目(2017HB095)资助 （2016YFC0503103,2017YFC0505005）
