| 热研3号俯仰臂形草光合日动态的研究 |
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| 引用本文： | 肖生鸿,刘金祥,林保花.热研3号俯仰臂形草光合日动态的研究[J].湛江师范学院学报,2007,28(3):100-103. |
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| 作者姓名： | 肖生鸿 刘金祥 林保花 |
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| 作者单位： | 1. 湛江师范学院,热带草业科学研究所,广东,湛江,524048
2. 广东药学院,药科学院,广东,广州,510006 |
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| 摘 要： | 使用LI-6400便携式光合分析仪对热研3号俯仰臂形草的光合日动态进行了测定.结果表明,热研3号俯仰臂形草的净光合速率(Pn)日变化呈双峰型,蒸腾速率(Tr)和气孔导度(Gs)变化趋势与Pn相似.Pn与光合有效辐射(PAR)和Gs的相关程度均达到了极显著水平(P<0.01).PAR是影响光合作用最为强烈的环境因子,而Tr是受环境因子控制最为显著的生理参数.数据显示,热研3号俯仰臂形草是一种高光效植物.
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| 关 键 词： | 热研3号俯仰臂形草 净光合速率 蒸腾速率 气孔导度 |
| 文章编号： | 1006-4702（2007）03-0100-04 |
| 修稿时间： | 2007-04-12 |
Diurnal Photosynthetic Changes of Brachiaria decumbens cv. Reyan No.3 |
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| XIAO Sheng-hong,LIU Jin-xiang,LIN Bao-hua.Diurnal Photosynthetic Changes of Brachiaria decumbens cv. Reyan No.3[J].Journal of Zhanjiang Normal College,2007,28(3):100-103. |
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| Authors: | XIAO Sheng-hong LIU Jin-xiang LIN Bao-hua |
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| Institution: | 1. Institute of Tropical Patacultural Science,Zhanjiang Normal College,Zhanjiang,Guangdong 524048,China ;2. College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, China |
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| Abstract: | Portable photosynthetic system was employed to determinate the photosynthetics of Brachiaria decumbens cv.Reyan No.3.The results showed that the net photosynthetic rate(Pn) of B.decumbens cv.Reyan No.3 had a diurnal change with two peaks.Transpiration rate(Tr) and stomatal conductance(Gs) were similar with Pn.There was a significant positive correlation between Pn and photosynthetic active radiation(PAR)(P<0.01),Gs(P<0.01).PAR had most intensive effect on the Pn,while Tr was most sensitive to the environmental factors.The data showed that B.decumbens cv.Reyan No.3 is a plant with high light use efficiency. |
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| Keywords: | Brachiaria decumbens cv Reyan No 3 net photosynthetic rate transpiration rate stomatal conductance |
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