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应用生态学报 ›› 2001, Vol. ›› Issue (4): 517-521.

• 研究论文 • 上一篇    下一篇

羊草叶片气孔导度特征及数值模拟

王玉辉1, 何兴元1, 周广胜2   

  1. 1. 中国科学院沈阳应用生态研究所, 沈阳 110016;
    2. 中国科学院植物研究所植被数量生态学开放研究实验室, 北京 100093
  • 收稿日期:2000-05-29 修回日期:2000-07-28 出版日期:2001-07-25
  • 通讯作者: 王玉辉,女,1972年生,博士,主要从事陆地生态系统对全球变化反应的研究,发表论文15篇.Tel:010-62591431-6268,E-mail:wzhougs@public2.east.cn.net
  • 基金资助:
    国家重点基础研究发展规划项目(G1999043407);国家自然科学基金重点项目(39730110和49835001);中国科学院知识创新工程项目(KSCX2107);国家自然科学基金面上项目(49905005;30070642)

Characteristics and quantitative simulation of stomatal conductance of Aneurolepidium chinense

WANG Yuhui1, HE Xingyuan1, ZHOU Guangsheng2   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016;
    2. Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093
  • Received:2000-05-29 Revised:2000-07-28 Online:2001-07-25

摘要: 对松嫩平原草地羊草叶片气孔导度特征及与环境因子关系的研究结果表明,羊草叶片气孔导度日变化与环境因子密切相关,晴天表现为双峰曲线,阴天为单峰曲线;同时叶片气孔导度(gs)对瞬时光合有效辐射(PAR)、叶片与空气间的水汽压亏损(VPD)、空气温度(Ta)反应十分明显.依据野外实测资料,在对国际上两类代表性气孔导度模型验证比较的基础上,建立了适用于羊草草原的羊草叶片气孔导度对环境因子的响应模型gs=PAR(2.01Ta2+147.74Ta-2321.11)/((444.62+PAR)(-38.04+VPD)).

Abstract: Based on field measurements of stomatal conductance and photosynthesis of Aneurolepidium chinense,the dynamic characteristics and the relationship between stomatal conductance and environmental conditions were examined to develop a leaf stomatal conductance model for A. chinense. The results showed that the variation of stomatal conductance of A. chinense was closely correlated with environmental factors, such as physiologically active radiation(PAR), vapor pressure deficit(VPD)and air temperature(Ta). The daily variation of A. chinense stomatal conductance could be described as M-type curve at fair-weather, but⌒-type curve at cloudy weather.The value of stomatal conductance increased with the increase of PAR or Ta, but decreased with the increase of VPD. The relationship between stomatal conductance(gs)and environmental factors could be expressed as:gs=PAR(2.01Ta2+147.74Ta-2321.11)/((444.62+PAR)(-38.04+VPD))..This model would be helpful to simulate the dynamical photosynthesis of leaf and canopy and to further simulate the NPP of ecosystems and the exchange of water and heat among the soil-plant-atmosphere continum.

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