摘要
为探明竹节树对干旱环境条件的适应性,以1年生竹节树（Carallia brachiata）幼苗为材料,研究不同干旱条件下（轻度、中度、严重干旱,土壤含水量分别为田间持水量的70%~80%、50%~60%、30%~40%）竹节树幼苗生长特征和生物量分配。结果表明：轻度干旱胁迫可促进竹节树幼苗生长,重度干旱胁迫使竹节树的叶片数、苗高、地径和冠幅减小,叶、茎、根和总生物量均大幅下降。随着干旱胁迫程度加剧,叶生物量比例先减小后增大,根生物量比例先增大后减小,地上与地下部分生物量的比值呈逐渐增大趋势。表明竹节树具有较强的抗旱性。
In order to elucidate the adaptation of Carallia brachiata, we study the effects of drought stress （light stress, moderate stress, serious stress, and their soil moisture are 70% -80% ,50% - 60% ,30% - 40% ） on growth characteristics and biomass allocation of 1-year-old C. brachiata. The results showed that light drought stress promote the growth of C. brachiata, but serious drought stres induced a remarkable decrease of the individual leaf number, height, ground diameter, crown diameter, leaf, stem,root and total biomass. With aggravating drought stress,there was attending that the leaf biomass ratio decreased and then increased. The root biomass ratio firstly increased and then decreased. The ratio of above-ground biomass/under-ground biomass was increased. The results showed that C. brachiata has strong drought resistance.
出处
《福建林业科技》
2016年第2期129-133,共5页
Journal of Fujian Forestry Science and Technology
基金
广东省科技计划项目(优良稀有树种竹节树的繁育技术和应用研究
2011B020413003)
国家林业局林业公益性行业科研专项项目(201004042)
关键词
竹节树
干旱胁迫
生长指标
生物量
生物量分配
Carallia brachiata
drought stress
growth index
biomass
biomass allocation
