Acta Agrestia Sinica

›› 2001, Vol. 9 ›› Issue (3): 202-206.DOI: 10.11733/j.issn.1007-0435.2001.03.008

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The Response to CO2 Concentration and Soil Drought Stress in Leymus chinensis Leaves

GAO Su-hua1, GUO Jian-ping1, ZHOU Guang-sheng2   

  1. 1. Chinese Academy of Meteorological Sciences, Beijing, 100081, China;
    2. Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
  • Received:2001-01-01 Revised:2001-05-10 Online:2001-08-15 Published:2001-08-15

羊草叶片对高CO2浓度和干旱胁迫的响应

高素华1, 郭建平1, 周广胜2   

  1. 1. 中国气象科学研究院, 北京, 100081;
    2. 中国科学院植物研究所, 北京, 100093
  • 作者简介:高素华(1940- ),女,研究员,主要从事农业气候资源、气候变化及农业生态等方面的研究
  • 基金资助:
    国家重点基础发展规划项目(G1999043400)资助

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Abstract: Through artificial simulated experiment,the response to high CO2 and drought stress in Leymus chiensis leaves was measured.The results showed that the photosynthetic rate was increased by about 45%.The leaf water poten tial was decreased by 9%-12%.The stomatal resistance was increased by 98%.The t ranspiration rate was decreased by 30% when CO2 enrichment.The drought stress increased leaf water potential,and stomatal resistance and decreased transpiration rate and photosynthetic rate.When the high CO2 and drought stress appeared at same time,the "CO2 fertilization" effect was restrained by drought stress,and the "fertilization"effect was remarkable decreased.

Key words: CO2 concentration, Soil drought stress, Leaf water potential, Stomatal resistance, Transpiration rate

摘要： 本文通过人工模拟试验,观测了羊草叶片对高CO2浓度、干旱胁迫的响应状况。结果表明,CO2浓度升高,叶片光合作用速率增大45%左右；叶片水势下降9%-12%；气孔阻力增大98%；蒸腾速率下降30%。干旱胁迫使叶片水势、气孔阻力增大,蒸腾速率、光合作用速率下降。两者同时发生时,"CO2施肥"效应受干旱胁迫抑制,"施肥"作用明显下降。

关键词: CO2浓度, 土壤干旱胁迫, 叶水势, 气孔阻力, 蒸腾速率

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