摘要
[目的]利用气孔导度(Gs)模型模拟红灯樱桃(Prunus avium L.‘Hongdeng’)叶片Gs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Ψl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Gs提供了科学依据。
[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 Ψl.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.
出处
《安徽农业科学》
CAS
2012年第12期6987-6988,7006,共3页
Journal of Anhui Agricultural Sciences
基金
院级课题"设施甜樱桃栽培关键技术研究与示范(XY-YF-11-10)"
关键词
红灯樱桃
GS
模拟
光合有效辐射
相对湿度
日变化
Cherry（Prunus avium L.＇Hongdeng＇）
Gs
Simulation
Photosynthetically active radiation
Relative humidity
Diurnal course
