| CO2倍增对几种植物的生态生理影响 |
| 摘要点击 1543 全文点击 1626 投稿时间：1994-05-03 |
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| 中文关键词 CO2倍增处理 净光合速率 气孔阻抗 蒸腾速率 水分利用效率 |
| 英文关键词 doubly increased CO2 treatment net photosynthesis rate stomatal resishace tianspiration rate water use efficiency |
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| 中文摘要 |
| 本研究结果表明:木本植物辽东栎、臭椿、丁香叶片气孔对CO2倍增反应不敏感,表现出气孔阻抗不增大,蒸腾速率无明显变化,光合速率比对照增加10%-20%或无增加,水分利用效率可提高10%-100%不等,叶面积略有增加或接近对照。可以认为CO2倍增对上述植物有不同程度的促进作用。草本植物水稻、大豆、谷子、稗草叶片气孔对CO2倍增反应敏感,尤其是C3植物的水稻、大豆,表现为气孔阻抗增大,蒸腾速率减少,光合速率在生长旺季增大,其余生长阶段下降,如以生长季总计可下降15%左右,水分利用效率变化不大。C4植物谷子、稗草对CO2倍增反应不及水稻、大豆明显,其气孔阻抗变化不大,光合速率在生长旺季增加,后略为下降,以生长季总计约下降10%,水分利用效率也有降低。 |
| 英文摘要 |
| The research results show that responses of the leaf stoma of Quercus liaotungensis,Ailanthus altissima,and Syringa oblata(woody plant)to a doubly increased CO2 were not very sensitive;the stomatal resistance did not enlarge;there was no obvious change in transpiration tate,the photosynthesis rate increased by 10%—20% as compared with control or did not increase;the water use efficiency increased from 10% to 100%;and the leaf area increased by a little or was near to the control.It can be considered that a doubly increased CO2 has a promotion auction to different degrees.However,the responses of the leaf stoma of Oryza sativa,Glycine max,Setaria italica,Echinochloa sp.(herbaceous plant),especially Oryza stativa and Glycine max(C3 plants),to a doubly increased CO2 were sensitive;the stomatal resisboce enlarged;the transpiration rate decreased, and the photosynthesis rate increased in the peak growing period,but edcreased in other growing periods.If calculated with the total growing period,it would decrease by about 15%,with a little change in water use efficiency.Setaria italica and Echinochloa sp.(C4 plants)had less obvious response to a doubly increased CO2 as C3 plants;its stomatal resistance was not much changed,the photosynthesis rate increased in the peak growing period and then bed a little decrease,it decreased by 10% in the total growing period and its water use efficiency decreased to some degree. |
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