Simulation du rendement maximal de la canne à sucre à différentes altitudes : effet de la température sur la conversion du rayonnement en biomasse

Martiné Jean-François, Siband Pierre-Lucien, Bonhomme Raymond. 1999. Simulation du rendement maximal de la canne à sucre à différentes altitudes : effet de la température sur la conversion du rayonnement en biomasse. Agronomie, 19 : 3-12.

Titre anglais : Simulation of the maximum yield of sugar cane at different altitudes : effect of temperature on the conversion of radiation into biomass

Résumé : To minimize the production costs of sugar cane, for the diverse sites of production found in La Réunion, an improved understanding of the influence of temperature on the dry matter radiation quotient is required. Existing models simulate poorly the temperature-radiation interaction. A model of sugar cane growth has been fitted to the results from two contrasting sites (mean temperatures : 14-30°C; total radiation : 10-25 Mj.m-2-d-1), on a ratoon crop of cv R570, under conditions of non-limiting resources. Radiation interception, aerial biomass, the fraction of millable stems, and their moisture content, were measured. The time-courses of the efficiency of radiation interception differed between sites. As a function of the sum of day-degrees, they were similar. The dry matter radiation quotient was related to temperature. The moisture content of millable stems depended on the day-degree sum. On the other hand, the leaf/stem ratio was independent of temperature. The relationships established enabled the construction of a simple model of yield potential. Applied to a set of sites representing the sugar cane growing area of La Reunion, it gave a good prediction of maximum yields.

Mots-clés Agrovoc : Saccharum, rendement des cultures, altitude, température, modèle de simulation, radiation solaire, biomasse, taux de croissance

Mots-clés géographiques Agrovoc : La Réunion, France

Classification Agris : F01 - Culture des plantes
F40 - Écologie végétale
U10 - Informatique, mathématiques et statistiques

Auteurs et affiliations

• Martiné Jean-François, CIRAD-CA-Canne à sucre (REU)
• Siband Pierre-Lucien, CIRAD-AMIS-AGRONOMIE (PHL)
• Bonhomme Raymond

Source : Cirad - Agritrop (https://agritrop.cirad.fr/401289/)

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