| The photosynthetic characteristics and water use efficiency in leaves of Hippophae rhamnoides L．in Northern Shaanxi |
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| DOI：10.7606/j.issn.1000-7601.2007.01.28 |
| Key Words: Hippophae rhamnoides L. CO2 compensation point CO2 saturation point light compensation point light saturation point |
| Author Name | Affiliation | | LI Wen-hua | Beijing Forestry University, Beijing 100083, China；College of Forestry Northwest A＆F University,Yangling,Shannxi 712100,Chnia | | ZHU Qing-ke | Beijing Forestry University, Beijing 100083, China | | LAI Ya-fei | Beijing Forestry University, Beijing 100083, China | | LI Hong-sheng | College of Forestry Northwest A＆F University,Yangling,Shannxi 712100,Chnia | | XU Huai-tong | College of Forestry Northwest A＆F University,Yangling,Shannxi 712100,Chnia | | LIU Guang-quan | China Institute of Water Resources and Hydropower Research,Beijing 100044,China |
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| Abstract: |
| With the Li-6400 portable photosynthesis system the photosynthetic characteristics in leaves of Hippophae rhamnoides L.during different period was determined.The main results were as follows: the light compensation points(LCP) in leaves of Hippophae rhamnoides L.changed from 15.66 to 112.31(μmol/(m2·s)) in different period,the light saturation points(LSP) varied from 1 327.39 to 1 638.89(μmol/(m2·s)) and the apparent photon utilization efficiency varied from 0.0052 to 0.0122 μmol/mol;the CO2 compensation point(CCP) of photosynthesis varied from 120.83 to 278.29 μmol/mol;the CO2 saturation points(CSP) varied from 192.24 to 775.59 μmol/mol.The Tr of Hippophae rhamnoides L.is in Sept.and Aug.higher than in Jun.,Jul.and May,and is at the highest in Aug.,at the lowest in May;the WUE shows Sept.>May.>Aug.>Jun.>Jul. |
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