| 田间苹果叶片光合速率日变化的研究 |
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| 引用本文： | 程来亮,罗新书.田间苹果叶片光合速率日变化的研究[J].园艺学报,1992,19(2):111-116. |
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| 作者姓名： | 程来亮 罗新书 |
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| 作者单位： | 山东农业大学园艺系，山东农业大学园艺系，山东农业大学园艺系 泰安 271018，泰安 271018，泰安 271018 |
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| 摘 要： |
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| 关 键 词： | 苹果树 光合速率 气孔导度 日变化 |
A STUDY ON DIURNAL CHANGES OF PHOTOSYNTHETIC RATE IN LEAVES OF APPLE TREES IN THE FIELD |
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| Cheng Lailiang,Luo Xinshu,and Yang Xinghong.A STUDY ON DIURNAL CHANGES OF PHOTOSYNTHETIC RATE IN LEAVES OF APPLE TREES IN THE FIELD[J].Acta Horticulturae Sinica,1992,19(2):111-116. |
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| Authors: | Cheng Lailiang Luo Xinshu and Yang Xinghong |
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| Abstract: | 2-year-old field-grown'Gold Spur'trees were used to study the diurnal changes of leaf photosynthetic rate ( Pn ) , stomatal conductance ( G s ) in different seasons. It was found that one-peak pattern was the main one of Pn diurnal changes in leaves of apple trees grown in the field. Pn reached a maximum at 8:00-10:00 A.M., then gradually decreased. The Pn decline was mainly cacsed by large leaf-air vapour pressure difference and high leaf temperature at noon, In most cases, Gs. and Pn showed similar diurnal changes,but the leaf internal CO_2 concentration and stomatal limitation value maintained relatively unchanged during daytime. The stomata had a little limitation on photosynthesis.The Pn diurnal change in apple leaves was mainly controlled by the mesophyll photosynthetic capacity. |
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| Keywords: | Apple Photosynthetic rate Stomatal conductance Diurnal changes |
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