| 红砂的净光合速率与蒸腾速率的日变化特征 |
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| 引用本文： | 白琰,龙瑞军,刘玉冰.红砂的净光合速率与蒸腾速率的日变化特征[J].甘肃农业大学学报,2006,41(2):56-58. |
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| 作者姓名： | 白琰 龙瑞军 刘玉冰 |
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| 作者单位： | 1. 甘肃农业大学草业学院,甘肃,兰州,730070
2. 兰州大学生命科学学院,甘肃,兰州,730000 |
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| 摘 要： | 以野生红砂(Reaumuria soongorica)为研究对象,在2004年5~7月早7∶00~晚20∶00(晴天)测定其净光合速率(Pn)、蒸腾速率(E)、光合有效辐射(PAR)、大气温度(T)等指标.结果表明:红砂的净光合速率日变化曲线呈M型,有明显的“光合午休”现象;红砂的蒸腾速率日变化曲线也呈M型,但“午休”现象不明显;有效光合辐射对红砂的净光合速率影响较大,大气温度则对红砂的蒸腾速率影响较大.
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| 关 键 词： | 红砂 净光合速率 蒸腾速率 |
| 文章编号： | 1003-4315（2006）02-0056-03 |
| 收稿时间： | 2005-06-28 |
| 修稿时间： | 2005-06-28 |
Diurnal changes of net photosynthetic rate and transpiration rate of Reaumuria soongorica |
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| BAI Yan,LONG Rui-jun,LIU Yu-bing.Diurnal changes of net photosynthetic rate and transpiration rate of Reaumuria soongorica[J].Journal of Gansu Agricultural University,2006,41(2):56-58. |
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| Authors: | BAI Yan LONG Rui-jun LIU Yu-bing |
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| Institution: | 1. College of Prataculture, Gansu Agricultural University,Lanzhou 730070; 2. College of Life Science,Lanzhou University,Lanzhou 730000,China |
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| Abstract: | From May to July in 2004,wild Reaumuria soongoricawas taken as the studied object,its net photosynthetic rate(P_(n)),transpiration rate(E),photosynthetically active radiation(PAR) and atmospheric temperature(T) were determined from 7∶00 am to 20∶00 pm(sunny day).The results showed that diurnal change curve of net photosynthetic rate of Reaumuria soongorica was M-type,and obvious"noon break"phenomenon was presented;diurnal change curve of transpiration rate was also M-type,but "noon break"phenomenon was not obvious;photosynthetically active radiation has great effect on net photosynthetic while atmospheric temperature has strong effect on transpiration rate. |
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| Keywords: | Reaumuria soongorica net photosynthetic rate transpiration rate |
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