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Mesure et modélisation des bilans d'énergie et de masse (eau) sur des plantes cultivées sous serre : impact d'une restriction hydrique

Abstract : In greenhouses, reducing water consumption is of high interest, not only to increase water effi ciency, but also to maintain competitiveness of the growers. The aim of this thesis is to provideanswers regarding the optimal water management. To reach this goal, predictive models water and energy transfers through the substrate-plant-atmosphere are implemented, considering wellwatered plants and plants under water restriction. Most existing models of water and energy transfers have benne established either on the soil-plants system, or on theplant-atmosphere system. Moreover, such models were mainly developed for open fi eld conditions, although plants grown in pots have specifi cities linked to the aerial and root confi nement.The challenge is therefore to develop an integrated soil-plantatmosphere model for greenhouse plants grown in pot. The thesis was based on a combined experimental and numerical approach.A field survey was conducted in 2014 and then in 2015 inside a greenhouse, and another one in a growth chamber in 2014. The New Guinea Impatiens was used as a plant model. The stomatal resistance was fi rst modeled, as a key factor impacting the transpiration, by using the multiplicative Jarvis model, andthen the design of experiments method for plants under wellwatered and water restriction conditions. The collected data was used to calibrate/validate the aforementioned stomatalresistance models; the obtained models could then be tested to evaluate transpiration with the Penman Monteith model and the direct method. Finally, these models were integrated in
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Submitted on : Thursday, November 30, 2017 - 9:17:23 AM
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  • HAL Id : tel-01652206, version 1

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Hacene Bouhoun Ali. Mesure et modélisation des bilans d'énergie et de masse (eau) sur des plantes cultivées sous serre : impact d'une restriction hydrique. Mécanique des fluides [physics.class-ph]. Agrocampus Ouest, 2016. Français. ⟨NNT : 2016NSARD080⟩. ⟨tel-01652206⟩

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