| 柃木苗期光合特性研究 |
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| 引用本文： | 应叶青,吴家胜,戴文圣,黎章矩.柃木苗期光合特性研究[J].浙江农林大学学报,2004,21(4):366-370. |
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| 作者姓名： | 应叶青 吴家胜 戴文圣 黎章矩 |
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| 作者单位： | 1.浙江林学院 生命科学学院, 浙江 临安 311300 |
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| 基金项目： | 浙江省科学技术厅基金项目(013138); 浙江省林业厅招标项目(01A02) |
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| 摘 要： | 运用美国Li-COR 公司制造的Li-6400 便携式光合作用测定系统, 研究柃木Eurya muricata 苗期的光合特性。结果表明, 柃木叶片净光合速率(Pn) 的日变化曲线呈双峰型, 有光合午休 现象, 第1 个峰值出现在9 :00 左右, 净光合速率(CO2) 达到7.35 mol m-2 s-1 ;第2 个峰值出现在16 :00 , 净光合速率为2.64 molm-2 s-1 。柃木叶片CO2 补偿点为53.8 molmol-1 , 饱和点为1 621.4 molmol-1 。柃木叶片光补偿点为42 molm-2 s-1 ,饱和点为1 000 molm-2 s-1左右。图5 参11
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| 关 键 词： | 树木生理学 柃木 光合特性 气孔导度 光合有效辐射 |
| 收稿时间： | 2004-05-25 |
Photosynthetic characteristics of Eurya muricata at seedling stage |
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| YINGYe-qing,WU Jia-sheng,DAI Wen-sheng,LI Zhang-ju.Photosynthetic characteristics of Eurya muricata at seedling stage[J].Journal of Zhejiang A&F University,2004,21(4):366-370. |
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| Authors: | YINGYe-qing WU Jia-sheng DAI Wen-sheng LI Zhang-ju |
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| Institution: | 1.School of Life Sciences , Zhejiang Forestry College , Lin’an 311300, Zhejiang , China |
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| Abstract: | The Li-6400 Portable Photosynthesis System made by American Li-COR Company was used to study the photosynthetic characteristics of Eurya muricata at seedling stage .The results showed that the daily variation of net photosynthetic rate in leaves presented a bimodal curve and an obvious midday depression' phenomenon .The first peak valuewas the highest , which occurred at about 9 :00 a.m ., the net photosynthetic rate was 7.35 molm-2 s-1 ;the second peak value occurred at 16 :00 p.m ., the net photosynthetic rate was 2.64 mol m-2 s-1 . The main reason for the midday depression was stomatal factors .At midday , the largest light intensity , the maximum vapor pressure deficit between leaves and air and the minimum air relative humidity , stomatal conductance and intercellular CO2 caused photosynthetic midday depression .The CO2 compensation point was 53.8 molmol-1 and CO2 saturation point was 1 621.4 mol mol-1 .The light compensation point was 42 molm-2 s-1 and light saturation point was about 1 000 molm-2 s-1 . Ch , 5 fig .11 ref .] |
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