中文摘要：

基于博斯腾湖北岸芦苇叶片气体交换的观测数据,分析芦苇叶片气孔导度特征与环境因子之间的关系,并验证植物叶片气孔导度模型。结果表明,芦苇叶片气孔导度日变化呈现双峰曲线。芦苇叶片气孔导度的变化与环境因子之间关系密切,当光合有效辐射较低时,气孔导度随光合有效辐射的增加而增加,当光合有效辐射大于1 200μmol·m-2·s-1时,气孔导度呈现下降趋势;气孔导度在一定范围内随水汽压亏损的增加而增加,在水汽压亏损接近1.8kPa时,气孔导度达到最大值,之后气孔导度随水汽压亏损的增加而降低;当温度达到27.75℃时,气孔导度达到最大,此后随着温度的增加,气孔导度逐渐降低。对2类气孔导度模型进行验证与对比,结合实测数据,建立适用于博斯腾湖芦苇叶片气孔导度对环境因子响应模型。

英文摘要：

Based on observations of gas exchange data of Phragmites communis leaves in north shore of Bosten Lake,the relationship between the conductance of reed leaf stomata characteristics and environmental factors was analyzed and validated on stomatal conductance model.Results showed that reed leaf stomatal conductance showed a bimodal curve.The change of reed leaf stomatal conductance was closely related to environmental factors.At low photosynthetically active radiation,stomatal conductance increases with photosynthetically active radiation,however,when the photosynthetically active radiation was greater than 1 200μmol·m-2·s-1,stomatal conductance had a decrease trend.Stomatal conductance increased with the increase of vapor pressure deficit in a certain range,and reached a maximum when the vapor pressure deficit was close to 1.8kPa,then decreased with the vapor pressure deficit increased.The stomatal conductance reached the maximum at the temperature of27.75 ℃,then decreased gradually with the increase of temperature.Gradually multiple regression analysis found that the key environmental factors to the reed stomatal conductance are the air temperature（Ta）,photosynthetically active radiation（PAR）,and leaf air vapour pressure deficit（VPD）.Two representative models of stomatal conductance were tested,combining with the measured data,and a suitable reed stomatal conductance model of environmental factors of Bosten Lake was established.