Rumen fermentation and diet degradability in sheep fed sugarcane (Saccharum officinarum) silage supplemented with Tithonia diversifolia or alfalfa (Medicago sativa) and rice polishing

  • Jose Lenin Loya-Olguin Universidad Autónoma de Nayarit
  • Esteban Vega-Granados
  • Agapito Gómez-Gurrola
  • Raúl Navarrete-Méndez
  • Concepción Calvo-Carrillo
  • Iván A. García-Galicia
  • Yissel S. Valdés-García
  • Leonor Sanginés-García

Abstract

The objective of this study was to evaluate ruminal fermentation (i.e. pH, ammonia, and volatile fatty acid concentrations) and in situ degradability of diets in sheep fed sugarcane silage (SCS) supplemented with Tithonia diversifolia (Td) or alfalfa (Medicago sativa) hay (A), with or without rice (Oriza sativa) polishing (RP) as an energy supplement. Four Blackbelly sheep (35 kg average body weight) with rumen cannula were used in a Latin square 4 × 4 design, with feeding periods of 21 d each. The experimental diets were  (g/kg of dry matter): diet 1) SCS (686.3) + Td (294.1), diet 2) SCS (460) + Td (225.5) + RP (294.1), diet 3) SCS (637.3) + A (343.1), and diet 4) SCS (421.2) + A (245.1) + RP (294.1). The remainder (19.6) was composed by minerals supplement and salt. Samples of diets were incubated in rumen for 3, 6, 9, 12, 24, 30, 36, 48, and 72 h to determine in situ degradability. The inclusion of RP improved the degradability of diets and ammonia production in the rumen. The acetic, propionic, and butyric acid concentrations (mmol/100 mL) in rumen increased (P<0.05) when diets with alfalfa and RP were fed. The degradability of diets based on sugarcane silage supplemented with either alfalfa or Tithonia diversifolia forage was improved (P<0.05) with the rice polishing inclusion, with no difference (P>0.05) between these forages. In conclusion, energy supplementation, not necessarily from starch, is important to improve rumen fermentation and degradability of diets based on sugarcane silage.
Published
May 6, 2020
How to Cite
LOYA-OLGUIN, Jose Lenin et al. Rumen fermentation and diet degradability in sheep fed sugarcane (Saccharum officinarum) silage supplemented with Tithonia diversifolia or alfalfa (Medicago sativa) and rice polishing. Austral Journal of Veterinary Sciences, [S.l.], v. 52, n. 2, p. 55-61, may 2020. ISSN 0719-8132. Available at: <http://australjvs.cl/index.php/amv/article/view/931>. Date accessed: 09 aug. 2020.
Section
Short Communication