[ Objective] The aim was to simulate the dynamic change law of cherry leaf s Gs under different weather by Gs model. [ Method] The experiment was conducted in a ' Hongdeng' cherry orchard. The parameters of the model were tested by the data observed in upper canopy from 2008 to 2011 during the growing seasons. [ Result] The diurnal course of Gs showed a double-peak curve on sunny days. And it reached the first peak of 240 mmol/(m2 · S) at mid-morning about 08:00 and the second at mid-afternoon about 16:00. The decline of Gs at noon was caused by lower RH and ψt. During a whole day (12 h) , average Gs was about 154. 36 mmol/( m2 · S) on sunny day. [ Conclusion] The study provides a scientific basis for using Gs model to simulate Gs of fruit tree leaf under different weather.%[目的]利用气孔导度(Gs)模型模拟红灯樱桃(Prunus avium L.‘Hongdeng’)叶片G,在不同气象条件下的动态变化规律.[方法]于2008～2011年在红灯樱桃园中,利用树冠上层叶片气体交换数据拟合相应参数.[结果]在晴天,樱桃上层叶片Gs呈双峰曲线,最大峰值出现在08:00左右,约240 mmol/( m2·s)；第2峰值在16:00,气孔的“午休”现象主要与中午较低的RH和ψ1有关.晴天时,一天当中Gs的平均值为154.36 mmol/( m2·s).[结论]该研究为采用Gs模型来模拟不同气象条件下果树叶片G1提供了科学依据.
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