| CO_2倍增对干旱胁迫下大豆光合效应的影响 |
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| 引用本文： | 张彤,王磊,杨俊兴. CO_2倍增对干旱胁迫下大豆光合效应的影响[J]. 河南农业科学, 2005, 0(8) |
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| 作者姓名： | 张彤 王磊 杨俊兴 |
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| 作者单位： | 河南大学生命科学学院 河南开封475001(张彤，王磊)，河南大学生命科学学院 河南开封475001(杨俊兴) |
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| 基金项目： | 国家自然科学资金(30270945)，河南省自然科学基金项目(111012200) |
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| 摘 要： | 采用开顶式气室,研究了干旱胁迫下CO2浓度升高对大豆生长状况、光合作用及蒸腾作用的影响。结果表明,CO2浓度升高,大豆的光合速率提高5%,蒸腾速率降低6.8%,气孔导度降低11%,大豆的水分利用效率提高了1.03倍,增强了大豆的抗旱性。CO2浓度升高,可增强土壤微生物的活动,使大豆根瘤数增多。干旱胁迫则使大豆的光合速率、蒸腾速率、气孔导度降低,水分利用效率提高。
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| 关 键 词： | 大豆 CO2倍增 干旱胁迫 光合效应 |
Effect of Elevated CO_2 Concentration on Photosynthetic Efficiency Soybean under Drought Stress |
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| ZHANG Tong,WANG Lei,YANG Jun-xing. Effect of Elevated CO_2 Concentration on Photosynthetic Efficiency Soybean under Drought Stress[J]. Journal of Henan Agricultural Sciences, 2005, 0(8) |
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| Authors: | ZHANG Tong WANG Lei YANG Jun-xing |
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| Abstract: | Soybean plants grown in open-top chambers were used to study the effects of elevated CO_2 concentration on photosynthesis, transpiration and stoma conductance under drought stress. The result shows the elevated CO_2 can enhance photosynthetic rate 5% and water use efficiency 1.03 times, whereas transpiration rate decreases 6.8% and stoma conductance decreases 11%, namely elevated CO_2 can enhances the capacity of plants to drought resistance. The elevated CO_2 concentration enhances the activity of edaphon and induces more root nodule of soybean. Water-stress decreases the photosynthesis, the transpiration, stoma conductance water use efficiency of soybean. |
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| Keywords: | Soybean Elevated CO_2 Drought-stress Photosynthetic efficiency |
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