| UV-B辐射增强对水稻光合特性及水分利用效率的影响 |
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| 引用本文： | 桂智凡,蒋跃林.UV-B辐射增强对水稻光合特性及水分利用效率的影响[J].安徽农学通报,2009,15(10):45-47. |
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| 作者姓名： | 桂智凡 蒋跃林 |
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| 作者单位： | 安徽农业大学资源与环境学院,安徽,合肥,230036;安徽农业大学资源与环境学院,安徽,合肥,230036 |
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| 摘 要： | 通过人工增加UV-B辐射，研究UV-B辐射对水稻叶片净光合速率、蒸腾速率和水分利用效率等光合特性的影响。试验设3个处理，CK为对照组（自然基础）．T1（0．5w／m^2）和T2（1w／m^2）。试验结果表明：随着UV-B辐射的增强，水稻叶片不同生育期净光合速率T1和T2组较CK组分别下降13．91％和22．36％，13．21％-22．06％，14．31％-20．56％。UV—B辐射的增强促使不同生育期水稻的蒸腾速率和水分利用效率降低．
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| 关 键 词： | UV-B辐射 水稻 净光合速率 影响 水分利用效率 |
Effects of Enhancment UV-B Radiation OH Photosynthetic Characteristics and Water Use Efficiency of Rice |
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| Institution: | Gui zhifan et al ( College of Resources and Environment Science, Anhui Agricultural University, Hefei 230036, China ) |
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| Abstract: | Under natural conditions, diurnal changes of photosynthetic rate, net photosynthetic rate （ Pn ） , transpiratiori rates （ Tr ） and water use efficiency （ WUE ） of rice leaves exposed to different intensities of UV-B radiation were studied.Compared to natural conditions, the net photosynthetic rate of rice leaves subjected to TI（ 0.5w/m^2 ）and T2 （1w/ m^2 ）were respectively decreased by 13.91%-22.36%, 13.21%-22.06%, 14.31%-20.56% during the different stages. On the other hand, the water use efficiency （ WUE ） and transpiration rates （ Tr ） were decreased during different stages of rice leaves under enhanement UV-B radiation. |
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| Keywords: | words：UV-B radiation rice net photosynthesis rate effect water use efficiency |
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