| 两种棕榈藤光合日变化及其与环境因子的关系研究 |
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| 引用本文： | 官凤英,范少辉,刘亚迪,彭颖,邓旺华.两种棕榈藤光合日变化及其与环境因子的关系研究[J].世界竹藤通讯,2010,8(4):1-6. |
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| 作者姓名： | 官凤英 范少辉 刘亚迪 彭颖 邓旺华 |
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| 作者单位： | 国际竹藤网络中心 竹藤科学与技术重点实验室生物资源利用科学研究院 北京 100102 |
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| 基金项目： | 林业科学技术推广项目"棕榈藤种质资源培育及利用技术推广与示范"，国际竹滕网络中心科研专项"优质棕榈藤苗期生长及光合作用研究" |
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| 摘 要： | 利用LI-6400光合仪测定了盈江省藤和小省藤的光合特征参数,探讨了两种棕榈藤光合日变化规律,并结合环境因子分析影响净光合速率(Pn)的主要因素,研究结果表明:(1)盈江省藤净光合速率Pn和蒸腾速率Tr日变化曲线均呈"双峰"型,存在"午休"现象;小省藤Pn值低,波动小,日变化呈"双峰"曲线趋势,Tr日变化曲线呈"单峰"型。(2)小省藤光合"午休"时间是12:00,盈江省藤的光合"午休"时间在下午14:00,比小省藤推迟了2h。(3)盈江省藤Pn日变化与RH呈显著正相关(r=0.820*,P<0.05),RH和Gs下降是导致盈江省藤发生光合"午休"的决定因素。小省藤的光合能力较盈江省藤弱,Pn日变化与各环境因子无显著相关性。
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| 关 键 词： | 棕榈藤 净光合速率 环境因子 日变化 光合“午休” |
A Study of Diurnal Variations in Photosynthetic Activity and Its Relationship with Environmental Factors for Two Species of Rattans |
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| Guan Fengying,Fan Shaohui,Liu Yadi,Peng ying,Deng Wanghua.A Study of Diurnal Variations in Photosynthetic Activity and Its Relationship with Environmental Factors for Two Species of Rattans[J].World Bamboo and Rattan,2010,8(4):1-6. |
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| Authors: | Guan Fengying Fan Shaohui Liu Yadi Peng ying Deng Wanghua |
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| Institution: | International Centre of Bamboo and Rattan, The Key Laboratory for Bamboo and Rattan, Academy of Bioresources Utilization, Beijing 100102 |
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| Abstract: | In the study, the diurnal dynamics of photosynthetic activity in Calamus nambariensis var. yingjiangensis and Calamus graeilis Roxb. were monitored using portable LI-6400 photosynthesis system in combination with the analysis of the main environmental factors influencing the net photosynthetic rate. The results were summarized as follows: 1) Calamus nambariensis var. yingjiangensis had an obvious bimodal curve of diurnal variation both in Pn and Tr with obvious midday depression of photosynthesis while Cala... |
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| Keywords: | rattan net photosynthetic rate environmental factor diurnal variation midday depression of photosynthesis |
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