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。
The research results show that responses of the leaf stoma of quercus liaotungensis,Ailanthus altissima,and Syringa blata(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.
出处
《环境科学》
CAS
CSSCI
CSCD
北大核心
1995年第1期1-4,共4页
Environmental Science
基金
国家自然科学基金
关键词
CO2倍增
植物
生态
生理学
doubly increased CO_2 treatment
net photosynthesis rate
stomatal resishace
tianspiration rate
water use efficiency.
