| 濒危植物广西火桐净光合速率及其影响因子研究 |
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| 引用本文： | 毛世忠,唐文秀,骆文华,丁莉,黄仕训.濒危植物广西火桐净光合速率及其影响因子研究[J].广西农业科学,2010,41(11):1165-1169. |
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| 作者姓名： | 毛世忠 唐文秀 骆文华 丁莉 黄仕训 |
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| 作者单位： | 广西壮族自治区中国科学院广西植物研究所; |
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| 基金项目： | 广西自然科学基金，中国科学院知识创新工程项目 |
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| 摘 要： | 使用LI-6400便携式光合测定系统对濒危植物广西火桐幼树叶片净光合速率（Pn）及其影响因子日变化速率进行测定,并进行相关分析、逐步回归分析和通径分析。结果表明：广西火桐净光合速率（Pn）日变化曲线为＂双峰＂型,变化趋势与蒸腾速率（Tr）相同;具有明显的＂光合午休＂现象,午间净光合速率（Pn）降低主要由气孔导度（Gs）降低引起;影响广西火桐叶片净光合速率（Pn）的主要生理因子是蒸腾速率（Tr）,主要生态因子是光照强度（PAR）和空气相对湿度（RH）。栽培管理中可通过增加透光度、适当浇水等措施来调节蒸腾速率,提高净光合速率,促进苗木快速生长。
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| 关 键 词： | 濒危植物 广西火桐 净光合速率 生理生态因子 通径分析 |
The factors affecting net photosynthetic rate in endangered plant Erythropsis kwangsiensis in Guangxi |
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| MAO Shi-zhong,TANG Wen-xiu,LUO Wen-hua,DING Li,HUANG Shi-xun.The factors affecting net photosynthetic rate in endangered plant Erythropsis kwangsiensis in Guangxi[J].Guangxi Agricultural Sciences,2010,41(11):1165-1169. |
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| Authors: | MAO Shi-zhong TANG Wen-xiu LUO Wen-hua DING Li HUANG Shi-xun |
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| Institution: | MAO Shi-zhong,TANG Wen-xiu,LUO Wen-hua,DING Li,HUANG Shi-xun(Guangxi Institute of Botany,Chinese Academy of Science,Guilin,Guangxi 541006,China) |
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| Abstract: | The diurnal variation and the factors affecting net photosynthetic rate(Pn) in Erythropsis Kwangsiensis were measured using LI-6400 portable photosynthetic analyzer in sunny days during October 2009,and the data were analyzed statistically for correlation,stepwise regression and path analysis.The results showed two different peaks in the curve of diurnal variations in Pn,and a similar trend was observed with transpiration rate(Tr).The midday depression in photosynthesis was significant,and it was principall... |
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| Keywords: | endangered plant Erythropsis kwangsiensis net photosynthetic rate physio-ecological factors path analysis |
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