Effect of maturity on chemical composition, phenolics and amino acids content and rumen degradability of Sorghum almum



Título del documento: Effect of maturity on chemical composition, phenolics and amino acids content and rumen degradability of Sorghum almum
Revista: Tropical and subtropical agroecosystems
Base de datos: PERIÓDICA
Número de sistema: 000266863
ISSN: 1870-0462
Autors: 1

2
Institucions: 1Yangzhou University, College of Animal Sciences, Yangzhou. China
2Egerton University, Department of Botany, Njoro. Kenia
Any:
Període: Ago
Volum: 7
Número: 2
Paginació: 63-72
País: México
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, descriptivo
Resumen en español Se estudio el efecto de la madurez sobre la composición química y la degradabilidad ruminal de Sorghum almum. El pasto fue cosechado a la 6, 10 y 14 semanas de crecimiento. La degradabilidad ruminal fue medida en 6 borregos (8 meses edad, PV 20.6 kg) con canula ruminal y alimentados con S. almum fresco (148.9 g MS y PC: 109.8 g kg-1 MS) y heno de Medicago sativa (903.1 g MS y PC: 188.6 g kg-1 MS) en proporción 3:1. Se incubaron bolsas de nylon con 5 g de MS (0, 12, 24, 36 y 48 h). El contenido de MS, FDN, FDA y ADL incrementó en 72.98, 62.64 y 56.5% respectivamente entre la 6ª. y 14ª. semana. En contraste, PC, EE, fenoles y RFV disminuyeron en 66.67, 73.42, 25.25 y 38.65% respectivamente. Las concentraciones de arginina, metionina, lisina y total de amino ácidos declinaron en 66.02, 78.26, 46.44 y 63.41% respectivamente. La degradabilidad de la MS, MO y PC se redujo con la edad (P < 0.01; P < 0.0001 y P < 0.0001, respectively). Se concluye que la madurez afecta de manera adversa la calidad del Sorghum almum
Resumen en inglés The effect of advancing maturity on chemical composition and in sacco rumen degradability of Sorghum almum was investigated. The grass was established and harvested at 6, 10 and 14 weeks-old. Herbage samples were analyzed for dry matter and chemical constituents following standard procedures. In sacco (Nylon bag) rumen degradability was done using 6 wethers (Age: 8 mo., 20.6 kg LW) and fed a ration comprising of 3:1 fresh S. almum (DM: 148.9 g DM and CP: 109.8 g kg-1 DM) and Medicago sativa hay (DM: 903.1 g DM and CP: 188.6 g kg-1 DM). Nylon bags containing 5 g DM were incubated (0, 12, 24, 36 and 48 h incubation periods). Dry matter, NDF, ADF and ADL content increased by 72.98, 62.64 and 56.5% respectively between 6 and 14 weeks. In contrast, CP, EE, total phenolics and RFV decreased by 66.67, 73.42, 25.25 and 38.65% respectively over the same period. Concentration of arginine, methionine, lysine and total amino acids declined by 66.02, 78.26, 46.44 and 63.41% respectively. DM, OM and CP degradability also declined with advancing age of the grass (P < 0.01; P < 0.0001 and P < 0.0001, respectively). It was therefore concluded that advancing maturity adversely affected the quality of Sorghum almum
Disciplines Biología
Paraules clau: Angiospermas,
Fisiología vegetal,
Plantas forrajeras,
Madurez,
Degradabilidad,
Rumen,
Aminoácidos,
Sorghum almum
Keyword: Biology,
Angiosperms,
Plant physiology,
Forage plants,
Maturity,
Degradability,
Rumen,
Amino acids,
Sorghum almum
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