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	Simulation of the stomatal conductance of winter wheat in response to light, temperature and CO2 changes
	Yu Q.
	2004
关键词	stomatal conductance light intensity temperature humidity CO2 model canopy photosynthesis model transpiration leaf humidity soil formulation
英文摘要	Background and Aims The stomata are a key channel of the water cycle in ecosystems, and are constrained by both physiological and environmental elements. The aim of this study was to parameterize stomatal conductance by extending a previous empirical model and a revised Ball-Berry model. Methods Light and CO2 responses of stomatal conductance and photosynthesis of winter wheat in the North China Plain were investigated under ambient and free-air CO2 enrichment conditions. The photosynthetic photon flux density and CO2 concentration ranged from 0 to 2000 mumol m(-2) S-1 and from 0 to 1400 mumol mol(-1), respectively. The model was validated with data from a light, temperature and CO2 response experiment. Key Results By using previously published hyperbolic equations of photosynthetic responses to light and CO2, the number of parameters in the model was reduced. These response curves were observed diurnally with large variations of temperature and vapour pressure deficit. The model interpreted stomatal response under wide variations in environmental factors. Conclusions Most of the model parameters, such as initial photon efficiency and maximum photosynthetic rate (P-max), have physiological meanings. The model can be expanded to include influences of other physiological elements, such as leaf ageing and nutrient conditions, especially leaf nitrogen content. (C) 2004 Annals of Botany Company.
出处	Annals of Botany
卷	93
期	4
页	435-441
收录类别	SCI
语种	英语
ISSN号	0305-7364
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22496]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yu Q.. Simulation of the stomatal conductance of winter wheat in response to light, temperature and CO2 changes. 2004.

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