IN SITU DEGRADABILITIES OF PEARL MILLET SILAGES IN SHEEP

• Autor(a) principal: Guimarães Júnior, Roberto
• Data de Publicação: 2010
• Outros Autores: Gonçalves, Lúcio Carlos, Jayme, Diogo Gonzaga, de Assis Pires, Daniel Ananias, Rodrigues, José Avelino dos Santos, Tomich, Thierry Ribeiro
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência animal brasileira (Online)
• Texto Completo: https://revistas.ufg.br/vet/article/view/7053
• topic: forage production; Forragicultura

The objective of this study was to evaluate and to compare in situ dry matter (DM), crude protein (CP) and neutral detergent fiber (NDF) degradabilities of three pearl millet genotypes silages (BRS-1501, NPM-1 e CMS-3), incubated at 6, 12, 24, 48 and 96 hours in sheep. The experimental design was a randomized block in split plot arrangement, and the means compared by SNK test at 5% significance level. Values of effective degradability at 2.0%/h, 5.0%/h and 8.0%/h passage rates were: 48.5%, 39.6% and 35.8% for BRS-1501 silage, 46.3%, 38.1% and 35.0% for NPM-1 silage and 47.8%, 40.2% and 36.9% for CMS-3 silage, respectively. The highest degradation rate (2.08% / h), solubility (74.4%) and effective degradability of CP were observed for CMS-3. The potential degradability (A) of NDF was equal to the potentially degradable fraction (B1) in all silages, whose values were 52.3% (BRS-1501), 57.6% (NPM-1) and 46.6% (CMS-3). CP fraction of pearl millet silages presented high solubility and CMS-3 silage showed better quality of this fraction. Low NDF degradabilities were observed for all silages. According to the findings of this work, the BRS-1501 and CMS-3 silages presented better nutritional value than the NPM-1 due to their highest effective degradabilities.KEYWORDS: Nutritive value, roughage, ruminants, supplementation.