Irrigation de précision : un choix économique? : analyse de la pertinence de gérer les irrigations à l'aide de tensiomètres dans la culture de la fraise au Québec et en Californie

Authors: Gendron, Laurence
Advisor: Caron, JeanLevallois, Raymond
Abstract: The analysis of the economic relevance of precision irrigation for field-grown strawberries in Quebec and California takes place in a context of increased water scarcity worldwide and global population growth. There is a critical need to improve irrigation practices in order to make a rational use of water. In this study, the irrigation management based on soil matric potential (or tension) was first compared to the conventional practice in strawberry cultivation in California and the profitability of the tension-based method was calculated. The economic relevance of deficit irrigation was also evaluated. As a second step, an analysis comparing a tension-based pulsed irrigation with the equivalent non-pulsed irrigation procedure was conducted to determine if pulsed water applications generated enough additional benefits to cover the cost of the investment in an automatic irrigation system in Quebec. The results of the first study revealed that irrigation management based on tension was highly cost-effective in addition to being a water saving approach relative to the conventional practice, whatever the location in California. The results also demonstrated that any amount of water saved by a deficit irrigation strategy was costly for strawberry growers. The results of the second study revealed that pulsed irrigation generated more benefits than non-pulsed irrigation in a highly permeable soil, and that the additional benefits were high enough to offset the cost of an automatic irrigation system.
Document Type: Mémoire de maîtrise
Issue Date: 2017
Open Access Date: 24 April 2018
Grantor: Université Laval
Collection:Thèses et mémoires

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