华南农业大学学报2018，Vol.39Issue(3)：90-95,6.DOI:10.7671/j.issn.1001-411X.2018.03.014
3种木兰科珍稀濒危树种的光合及固碳特性
Photosynthetic and carbon sequestration characteristics of three rare and endangered species of Magnoliaceae
摘要
Abstract
[Objective]To illuminate the photosynthetic and carbon sequestration characteristics of rare and endangered species of Magnoliaceae, and provide theory and technology bases for their conservation and utilization.[Method]Manglietia aromatica,M.lucida and M.kaifui were studied with LI-6400 portable photosynthetic system measuring photosynthetic characteristics. Their carbon sequestration and oxygen release amounts were estimated to evaluate comprehensively their adaptabilities and ecological effects.[Result]The diurnal variations of net photosynthetic rates of three species displayed bimodal curves with obvious midday depression in July and unimodal curves in October. The daily mean values of net photosynthetic rates of three species in July were 5.35 μmol·m–2·s–1(M.kaifui),2.87 μmol·m–2·s–1(M.lucida)and 2.78 μmol·m–2·s–1(M. aromatica)successively,and the values in October were 6.46 μmol·m–2·s–1(M.kaifui),6.24 μmol·m–2·s–1(M. aromatica)and 5.74 μmol·m–2·s–1(M.lucida)respectively.The carbon sequestration and oxygen release amount of three species was in order of M.kaifui>M.aromatica>M.lucida.[Conclusion]The test plants display more vigorous growth in October than July. M. kaifui has the best capacity of utilizing strong light while M. aromatica has the best capacity of utilizing weak light.M.kaifui has the best carbon sequesteration and oxygen release abilities among three species.关键词
木兰科/濒危树种/光合作用/固碳量/释氧量Key words
Magnoliaceae/endangered species/photosynthesis/carbon sequestration/oxygen release amount分类
农业科技引用本文复制引用
戚嘉敏,许逸林,张鹏,奚如春,陆晨,高乐..3种木兰科珍稀濒危树种的光合及固碳特性[J].华南农业大学学报,2018,39(3):90-95,6.基金项目
林业公益性行业科研专项(201404116) （201404116）
广东省科技计划项目(2014KJCX006) （2014KJCX006）
