| 中华蚊母树光合作用日变化初步研究 |
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| 引用本文： | 陈桂芳,蔡孔瑜,娄利华,李在军. 中华蚊母树光合作用日变化初步研究[J]. 西南林学院学报, 2008, 28(3): 1-3 |
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| 作者姓名： | 陈桂芳 蔡孔瑜 娄利华 李在军 |
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| 作者单位： | 重庆市林业科学研究院三峡库区森林生态保护与恢复重点实验室,重庆,400036 |
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| 摘 要： | 用CB-1102型便携式光合测定仪，在自然条件下测定中华蚊母树的光合作用日进程主要指标．结果表明：在夏季晴天，中华蚊母树光合日动态呈明显的双峰曲线，峰值分别出现在12：00和16：00，在14：00左右表现出明显的“光合午休”现象，光合速率最大值出现在12：00，为9．37μmoL／m^2·s；蒸腾速率日变化呈单峰曲线，到12：00达到1天最大值，约为4．34μmoL／m^2·s；蒸腾速率、大气温度、光合有效辐射及胞间CO2浓度等生理生态因子对光合速率存在不同程度的影响．
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| 关 键 词： | 光合速率 蒸腾速率 日变化 中华蚊母树 |
Preliminary Study on Variation of Diurnal Photosynthesis of Distylium chinense Plants |
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| CHEN Gui-fang,CAI Kong-yu,LOU Li-hua,LI Zai-jun. Preliminary Study on Variation of Diurnal Photosynthesis of Distylium chinense Plants[J]. Journal of Southwest Forestry College, 2008, 28(3): 1-3 |
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| Authors: | CHEN Gui-fang CAI Kong-yu LOU Li-hua LI Zai-jun |
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| Affiliation: | ( Key Laboratory of the Three Reservior Area Forest Ecology Protection and Restoration, Forestry Academy of Chongqing Municipality, Chongqing 400036, China) |
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| Abstract: | The main photosynthesis indexes of Distylium chinense were measured with CB -1102 portable photosynthesis instrument under natural condition. The results showed that the daily progress of photosynthesis rate（Pn） was an obvious double -peak curve. The peak values were at 12：00 am and 16：00 pm respectively. Light noon break occurred at about 14：00 pm. The maximum net photosynthesis rate occurred at 12：00 am and was only 9. 37μmol/m^2·S. The curve of diurnal variation of transpiration rate was one peak curve, but the peak value appeared at 12：00 am to 16：00 pm, which was 4.34μmol/m^2·s or so. Photosynthesis rate was also affected to different extents by eco -physiological factors such as transpiration, temperature, Ci and PAR. |
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| Keywords: | photosynthesis rate transpiration rate diurnal photosynthesis courses Distylium chinense |
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