| 外来种火炬树光合作用日变化与环境因子的关系 |
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| 引用本文： | 郭二辉,胡聃,田朝阳.外来种火炬树光合作用日变化与环境因子的关系[J].河南农业科学,2010(6). |
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| 作者姓名： | 郭二辉 胡聃 田朝阳 |
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| 作者单位： | 1. 河南农业大学,生命科学学院,河南,郑州,450002
2. 中国科学院,生态环境研究中心,北京100085 |
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| 摘 要： | 为了研究外来植物火炬树的光合、蒸腾生理特征及其与环境因子的关系,应用LI-6400便携式光合测定仪,于2008年8-11月对外来植物火炬树的光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)、水分利用效率(WUE)的日变化特征,及其与环境因子的关系进行了研究。结果表明,火炬树的光合速率日变化在8月为双峰曲线,有明显的光合午休现象,在9-11月,光合日变化曲线则为单峰曲线,光合速率随季节的推移而逐渐降低;不同月份,影响火炬树Pn、Gs和Tr日变化的主要因子也有所不同;8-11月,火炬树的WUE呈逐渐增高的趋势,说明随着季节的变化,火炬树的Tr比Pn下降的幅度更大,以适应环境因子的变化。
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| 关 键 词： | 火炬树 光合作用 日变化 环境因子 |
Daily Dynamics of Photosynthesis of Rhus typhina and Their Relationships with Environmental Factors |
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| GUO Er-hui,HU Dan,TIAN Chao-yang.Daily Dynamics of Photosynthesis of Rhus typhina and Their Relationships with Environmental Factors[J].Journal of Henan Agricultural Sciences,2010(6). |
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| Authors: | GUO Er-hui HU Dan TIAN Chao-yang |
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| Abstract: | The leaf daily dynamics of photosynthesis rate(Pn),transpiration rate(Tr),stomata conductance(Gs),water use efficiency(WUE) of exotic plant-Rhus typhina were determinedusing LI-6400 portable photosynthesis system from August to November in 2008 and their relationships of the physiological characteristics of photosynthesis and transpiration rate with environmental factors were analysed.The daily change of photosynthesis appeared double peaks in August with an obvious midday depression of photosynthesis,while from September to November,single peak.The Pn reduced gradually with the elapse of season.In different months,the main factors affected the daily changes of Pn,Gs and Tr varied.From August to November,the Pn of Rhus typhina decreased,for Tr,even more,while the WUE gradually increased.All of these changes make Rhus typhina adapt the changes of environment. |
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| Keywords: | Rhus typhina Photosynthetic Daily dynamics Environmental factors |
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