文献类型：期刊文献

中文题名：桉树无性系苗期光合作用特性研究

英文题名：Study on Photosynthesis of Eucalyptus Clones Seedling

作者：陆钊华[1] 徐建民[1] 陈儒香[1] 李光友[1] 白嘉雨[1] 陈德祥[1]

第一作者：陆钊华

机构：[1]中国林业科学研究院热带林业研究所

年份：2003

卷号：16

期号：5

起止页码：575-580

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：世界银行贷款NAP和FRDPP项目"桉树速生丰产林培育技术的研究与推广"部分内容

语种：中文

中文关键词：桉树;无性系;光合特性;早期选择

外文关键词：eucalyptus;clones;photosynthesis;early selection

分类号：S792.39

摘要：对6个桉树人工林高产无性系的苗期光合作用特性进行了测定,结果表明:尾叶桉净光合速率与光强呈显著的二次曲线相关关系,光响应的饱和点为1967 7μmol·m-2·s-1。桉树无性系具较高的净光合速率与蒸腾速率,不同无性系各项光合生理生态指标差异显著,尾×巨桉、尾×细桉等生长量较好的无性系较尾×赤桉和尾叶桉无性系的水分利用效率更高,光合能力更强。净光合速率、蒸腾速率及气孔导度三者日变化进程较为相似,而胞间CO2浓度的日变化趋势则与净光合速率相反。净光合速率、气孔导度与蒸腾作用与树高、胸径、单株材积等生长指标存在一定程度的正相关关系,可应用于优良无性系的早期选择。
The photosynthesis of 6 superior eucalyptus clones were tested.The results were as follows: The net photosynthetic rate (Pn) of E.urophylla and irradiance had a conic correlation evidently, the light response saturation point was 1 967.7 μmol·m-2 ·s-1 .All photosynthesis were significantly different among clones, Pn and transpiration rate ( E ) of the eucalyptus clones were higher than other local broad-leaved tree species.Some clones of E.urophylla × E.grandis and E.urophylla × E.tereticornis grew not only faster than those of clones of E.urophylla × E.camaldulensis and E.urophylla , but also with high water used efficiency ( WUE ) and stronger ability of photosynthesis.The daily variation of Pn、E and leaf conductance ( gs ) were similar,but leaves of intercellular CO2 concentration ( Ci ) and Pn showed the other way round in the diurnal courses. Pn, gs and WUE had positive correlation with the H , DBH and SV , these results could be useful for early selection of superior eucalyptus clones.