| 长白山地区蒙古栎光合特性 |
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| 引用本文： | 吴家兵,关德新,张弥,施婷婷,韩士杰,金昌杰.长白山地区蒙古栎光合特性[J].中国科学院研究生院学报,2006,23(4):548-554. |
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| 作者姓名： | 吴家兵 关德新 张弥 施婷婷 韩士杰 金昌杰 |
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| 作者单位： | 1. 中国科学院沈阳应用生态研究所,沈阳,110016;中国科学院研究生院,北京,100049
2. 中国科学院沈阳应用生态研究所,沈阳,110016 |
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| 基金项目： | 中国科学院资助项目;中国科学院方向性项目;中国科学院前沿领域研究基金 |
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| 摘 要： | 基于单叶尺度上的光强－光合响应以及CO2－光合响应测定，对长白山地区蒙古栎成树和幼树的光合特性分别进行了研究．结果表明，蒙古栎成树的光补偿点（Lcp）为21μmol/m2/s，光饱和点（Lsp）为1564μmol/m2/s，表观量子效率（a）为0.045μmol/mol；幼树的Lcp、Lsp、a以及CO2补偿点、饱和点分别为29μmol/m2/s、1581μmol/m2/s、0.049μmol/mol、73μmol/mol、625μmol/mol．幼树和成树具有相似的光响应特征，但前者的光合同化能力要高于后者．蒙古栎具有典型的喜光性，但对高光的利用效率要低于弱光．
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| 关 键 词： | 蒙古栎 光合特性 光响应曲线 Li-6400 光合作用仪 |
| 文章编号： | 1002-1175(2006)04-0548-07 |
| 修稿时间： | 2005年9月15日 |
Photosynthetic Characteristics of Quercus Mongolica in Region of Changbai Mountain |
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| WU Jia-Bing,GUAN De-Xin,ZHANG Mi,SHI Ting-Ting,HAN Shi-Jie,JIN Chang-Jie.Photosynthetic Characteristics of Quercus Mongolica in Region of Changbai Mountain[J].Journal of the Graduate School of the Chinese Academy of Sciences,2006,23(4):548-554. |
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| Authors: | WU Jia-Bing GUAN De-Xin ZHANG Mi SHI Ting-Ting HAN Shi-Jie JIN Chang-Jie |
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| Institution: | 1 Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
2 Graduate School of the Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | he Photosynthetic characteristics of Quercus mongolica were studies based on the measurement of leaves photosynthesis under artificial controlled conditions of light intensities and CO2 concentration in region of Changbai Mountain. For mature trees, the light compensation point (Lcp), light saturation point (Lsp) and apparent quantum efficiency (α) were 21μmol/m2/s, 1564μmol/m2/s and 0.045μmol/mol, respectively. For young trees, the values of Lcp, Lsp, α, and CO2 compensation point, CO2 saturation point were 29μmol/m2/s, 1581μmol/m2/s, 0.049μmol/mol, 73μmol/mol, 625μmol/mol, respectively. The photosynthesis assimilation of young trees was more active than mature trees. It suggested that the Quercus mongolica was intrinsically helophytic plant, but the use efficiency of light quantum was low in strong light condition. The results also showed that the diurnal variations of net photosynthetic rate of young trees assume a typical midday depression pattern. Strong light intensity and high VPD were the key influencing factors. |
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| Keywords: | Quercus mongolica photosynthetic characteristic light response curve Li-6400 photosynthesis system |
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