Photosynthetic characteristics for fifteen potted seedlings common to Zhejiang Province
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摘要: 为比较不同树种对光的适应能力和耐荫性，探讨树种在植被恢复过程中的配置依据，利用Licor-6400便携式光合仪，于2010年秋季测定了苦槠Castanopsis sclerophylla，木荷Schima superba，杜英Elaeocarpus decipiens等15个浙江常见树种的光响应过程和光合日进程，并计算上述树种的光能利用率。研究结果表明：①所测15个树种的净光合速率日变化均呈单峰型，无光合午休现象。②东南石栎Lithocarpus harlandii，红豆杉Taxus chinensis，美丽胡枝子Lespedeza formosa分别是阔叶、针叶和灌木树种中光能利用率峰值较高的树种。③光饱和点苦槠最高，浙江楠Phoebe chekiangensis最低；光补偿点马尾松Pinus massoniana最高，红豆杉最低。④对光补偿点和光饱和点进行聚类分析，认为马尾松，乌冈Quercus phillyraeoides，属于强阳性树种；苦槠，美丽胡枝子，水杉Metasequoia glyptostroboide，东南石栎归属于阳性树种；红花檵木Loropetalum chinense，红叶石楠Photinia fraseri，杜英，乌桕Sapium sebiferum，木荷，石栎Lithocarpus glaber，竹柏Podocarpus nagi，红豆杉和浙江楠归类为耐荫树种，对弱光的利用能力较强。图5表1参16Abstract: To compare the light adaptation and shade tolerance of 15 different tree species，and to provide development bases for tree species in the vegetative recovery process，diurnal changes of photosynthesis and light response characteristics for Castanopsis sclerophylla，Schima superba，Elaeocarpus decipiens，Sapium sebiferum，Lithocarpus harlandii，Lithocarpus glaber，Phoebe chekiangensis，Quercus phillyraeoides， Podocarpus nagi，Pinus massoniana，Metasequoia glyptostroboides，Taxus chinensis，Photinia fraseri，Lespedeza formosa，and Loropetalum chinense var. rubrum were measured by Li-6400 portable photosynthesis system in the autumn of 2010. Then，light use efficiency of the 15 potted seedlings was determined. Results showed that：1） the diurnal process of the net photosynthetic rate （Pn） for the 15 potted seedlings had a single-peak with no midday depression. 2） Peak light use efficiency，by tree type，was higher for Lithocarpus harlandii （in broadleaf），T. chinensis （in coniferous），and Lespedeza formosa （in shrubs）. 3） C. sclerophylla had the highest light saturation point （LSP），whereas Phoebe chekiangensis had the lowest；Pinus massoniana had the highest light compensation point （LCP），and T. chinensis had the lowest. 4） The cluster analysis for LSP and LCP showed that Quercus phillyraeoides and Pinus massoniana were strong positive species；C. sclerophylla，Lespedeza formosa，M. glyptostroboides，and Lithocarpus harlandii belonged to the positive species; and the remaining nine species were classified as shade-tolerant tree species. These results provided development bases for tree species in the vegetative recovery process and community structure optimization for the hilly area of Zhejiang Province.［Ch，5 fig. 1 tab. 16 ref.］
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https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2012.02.004
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