Productividad y calidad nutricional de genotipos de sorgo para doble proposito

Gutiérrez Palacios Nury Deyanira, Chow Wong Zildghean, Bastianelli Denis, Bonnal Laurent, Obando Solis Rafael, Trouche Gilles. 2013. Productividad y calidad nutricional de genotipos de sorgo para doble proposito. Agronomía Mesoamericana, 24 (1) : 119-131.

Titre anglais : Productivity and nutritional quality of double purpose sorghum genotypes

Résumé : The objective of this study was to evaluate a set of dual purpose sorghum genotypes for their grain and fodder productivity, as well as for nutritional quality of leaves and stems for livestock. From 2003 through 2005, 26, 15 and 8 genotypes were evaluated respectively, in comparison with the control variety INTA CNIA during the postrera season (August to November) in the experimental fields of the National Agricultural Research Centre (INTA CNIA), Nicaragua. Agronomic traits were measured as well as nutritional quality of leaves and stems using the Near Infrared Spectrometry method. For all agronomic and nutri-tional quality traits were found significant differences among genotypes, except for grain yield in 2004, and the neutral and acid detergent fiber contents in stems. The heritability of agronomic and quality traits in leaves was high (? 0.50), with values between 0.96 and 0.51 but lower for most of quality parameters in stems, with values between 0.47 and 0.20. The only significant positive correlation was among crude protein (MAT) and leave - stem ratio in fresh stems (H/RF). The genotypes BF 95-11/195, Sureño, SH 688, V142 and V 144, achieved the best results for grain and fodder yield and fodder quality (regarding both leaves and stems). Sureño out-yielded the control variety for crude protein content per hectare (MPB/ha) in 50 and 33 % for leaves and stems respectively.

Mots-clés Agrovoc : Sorghum, aliment du bétail, valeur nutritive, digestibilité, variation génétique, génotype, contrôle continu, rendement des cultures, héritabilité, caractère agronomique, feuille, tige, fourrage grain, fourrage vert, composition chimique, spectroscopie infrarouge

Mots-clés géographiques Agrovoc : Nicaragua

Classification Agris : F30 - Génétique et amélioration des plantes
F01 - Culture des plantes
Q04 - Composition des produits alimentaires

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Gutiérrez Palacios Nury Deyanira, INTA [Nicaragua] (NIC)
• Chow Wong Zildghean, CIAT (NIC)
• Bastianelli Denis, CIRAD-ES-UMR SELMET (FRA) ORCID: 0000-0002-6394-5920
• Bonnal Laurent, CIRAD-ES-UMR SELMET (FRA) ORCID: 0000-0001-5038-7432
• Obando Solis Rafael, INTA [Nicaragua] (NIC)
• Trouche Gilles, CIRAD-BIOS-UMR AGAP (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/568991/)

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