| 龙眼光合特性及其影响因子的研究 |
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| 引用本文： | 廖镜思,刘殊.龙眼光合特性及其影响因子的研究[J].园艺学报,1996,23(1):1-7. |
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| 作者姓名： | 廖镜思 刘殊 |
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| 作者单位： | 福建农业大学，福建农业大学，福建农业大学，福建农业大学 福州 350002，福州 350002，福州 350002，福州 350002 |
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| 基金项目： | 国家850110201科技攻关课题的子课题 |
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| 摘 要： | 在田间和试验室条件下研究了龙眼叶片的光合作用特性。结果表明:龙眼叶片光合速率(Pn)的季节变化呈双峰曲线,最高峰在6月,次高峰在8月,5～9月Pn均维持在较高水平;春季(5月)Pn的日变化曲线为单峰型,高峰在正午,夏季(7月)Pn的日变化为双峰型,高峰在10时,16时有一小高峰;晴天Pn的日变化有明显的“午休”现象,多云天“午休”现象不明显,阴雨天pn较低,且无“午休”现象;Pn由负转正的叶龄为7～10天,30～40天叶龄叶片的Pn最高,60天后Pn缓慢下降;Pn的最适温度范围比较狭窄;环境温度为27℃和22℃时的光合最适温分别为28±2℃和25±2℃。龙眼的光合作用光补偿点和光饱和点分别为600～800μEm-2s-1和30～40μuEm-2s-1。最适土壤相对含水量为58％～84％。灌水临界期为土壤相对含水量38％～42％。
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| 关 键 词： | 龙眼 净光合速率 光照强度 温度 水分 |
A Study on Photosynthesis of Longan ( Dimocarpus Longana Lour. ) and Its Influencial Factors |
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| Liao Jingsi,Liu Shu,Chen Qingxi,and Zheng Guohua.A Study on Photosynthesis of Longan ( Dimocarpus Longana Lour. ) and Its Influencial Factors[J].Acta Horticulturae Sinica,1996,23(1):1-7. |
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| Authors: | Liao Jingsi Liu Shu Chen Qingxi and Zheng Guohua |
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| Institution: | Fujian Agricultural University. Fuzhou 350002 |
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| Abstract: | The photosynthetic characteristics of Longan leaves under field and laboratory conditions were studied. The results were as followed; The curve of annual variation of Longan leaf photosynthesis showed two peaks, the first was in June, and the second was in August. Pn remened higher level from May to September. The curve of diurnal variation of Pn in the spring ( May) demonstrated a single peak appearing at noon. The diurnal variation of Pn in summer ( July) demonstrated two peaks. The first peak appeared at.. |
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| Keywords: | Longan Net photosynthetic rate Temperature Water Light |
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