Functional relationships between dry above-ground biomass and the energy yield of sugarcane

Chopart Jean-Louis, Bonnal Laurent, Martiné Jean-François, Sabatier Daniel. 2013. Functional relationships between dry above-ground biomass and the energy yield of sugarcane. In : Proceedings of the XXVIII ISSCT (International Society of Sugar Cane Technologists) Congress, São Paulo, Brazil 2013 june 24-27. Brazilian Society of Sugar and Ethanol Technologists (STAB) ; XXVIIIth ISSCT Organising Committee. s.l. : D.M. HOGARTH, Résumé, 39. ISBN 978-0-949678-27-0 ISSCT Congress. 28, São Paulo, Brésil, 24 Juin 2013/27 Juin 2013.

Titre espagnol : Relaciones funcionales entre la biomasa aerea seca y el rendimiento energetico de la cana de azucar / Titre français : Relations fonctionnelles entre la biomasse seche et le rendement energetique de la canne a sucre / Titre portugais : Relaçoes funcionais entre biomassa aerea seca e a produtividade de energia da cana-de-açucar

Matériel d'accompagnement : 1 Communication complète

Résumé : Two studies conducted in Guadeloupe (West Indies) and Réunion (Indian Ocean) islands were designed to investigate the benefits of producing sugarcane as an energy crop and to assess the influence of agroclimatic factors on energy efficiency, respectively. In this context, it is essential to know the low heating value of the dry above-ground biomass (LHVd, MJ/kg) and its energy yield (EY, MJ/m2) in order to select the best varieties and set up a payment method for growers. Eighteen Poaceae (sugarcane and Erianthus) cultivars were compared under wet tropical environmental conditions in Guadeloupe. Three sugarcane cultivars were studied in four contrasting environments in Réunion. The partition sampling and biomass measurement procedures were identical at both locations. Low heating value (LHV) predictions were achieved using near-infrared reflectance spectroscopy (NIRS) after specific calibration (Guadeloupe), or arithmetically after lignocellulosic compound prediction (Réunion). In both studies, LHV variability was very low and slightly dependent on the site, cultivar and above-ground biomass components (millable stalks and tops, and green and dead leaves). Considering the overall dry above-ground biomass (DAB, kg/m2), the LHVd was calculated by averaging 159 samples (mean 16.65 MJ/kg) in Guadeloupe and 315 samples (mean 16.45 MJ/kg) for Réunion. An excellent linear relationship between the DAB and its EY, regardless of cultivar, age and environment, was found (n = 474 and R² = 0.99). Sugarcane energy content assessment could thus be simplified by measuring the DAB, while enabling development of a faster method of payment for growers based on the DAB measurement and the correlation between DAB and EY. Finally, the findings of this study should allow growers to rapidly determine the commercial value of their sugarcane crops, and also enable purchasers to assess the amount of recoverable energy.

Classification Agris : P06 - Sources d'énergie renouvelable
F01 - Culture des plantes
F60 - Physiologie et biochimie végétale

Auteurs et affiliations

• Chopart Jean-Louis, CIRAD-PERSYST-UPR SCA (GLP)
• Bonnal Laurent, CIRAD-ES-UMR SELMET (FRA) ORCID: 0000-0001-5038-7432
• Martiné Jean-François, CIRAD-PERSYST-UPR SCA (REU)
• Sabatier Daniel, IRD (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/570786/)

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