In situ digestibility of sugar-cane (Saccharum officinarum) as fresh forage or silage, with or without urea

  • Carlos de Sousa Lucci Universidade de Santo Amaro, Faculdade de Medicina Veterinária, São Paulo, SP
  • Edison Valvasori Secretaria da Agricultura de São Paulo, Instituto de Zootecnia, São Paulo, SP
  • Adriana Capezzuto Universidade de Santo Amaro, Faculdade de Medicina Veterinária, São Paulo, SP
  • Ricardo Lopes Universidade de Santo Amaro, Faculdade de Medicina Veterinária, São Paulo, SP
  • Valter Fontolan Universidade de Santo Amaro, Faculdade de Medicina Veterinária, São Paulo, SP
  • Gilberto Buffarah Secretaria da Agricultura de São Paulo, Instituto de Zootecnia, São Paulo, SP
  • Kleber da Cunha Peixoto-Junior Universidade de Santo Amaro, Faculdade de Medicina Veterinária, São Paulo, SP
Keywords: Sugar-cane, Sugar-cane silage, Ruminal degradability

Abstract

Twelve rumen canulated male sheep were used to evaluate ruminal effective degradability (EDG) and volatile fatty acids(VFA), ammonia nitrogen(N-NH3) and pH of rumen contents, and blood ureic nitrogen . They received six treatments in a factorial arrangement 2 x 3: sugar cane fresh (CAF) or as silage (CAS) x urea levels of 0%, 0.5% and 1.0% for both forages. Values of EDG of CAF and CAS dry matter(DM) were not significantly different. Addition of crescent levels of urea to the forages resulted in a linear decrease of DM EDG for CAF and CAS. Considering CAS, EDG of neutral detergent fiber was linearly lower with crescent levels of urea. Ruminal contents pH values were higher for CAF than for CAS but no differences were find among levels of urea addition. Ruminal contents levels of total VFA and propionic acid were higher for CAF than for CAS; inversely, acetic acid levels were higher for CAS. N-NH3 levels of ruminal contents were higher for CAS than for CAF. For both fresh and silage treatments, N-NH3 concentrations in ruminal contents, as well N-ureic blood concentrations increased linearly with higher levels of urea addition. It was concluded that 0.5% and 1.0% urea added to fresh or ensiled forages had no satisfactory results and that CAF indicated better nutritional value than CAS.

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Published
2006-08-01
How to Cite
Lucci, C., Valvasori, E., Capezzuto, A., Lopes, R., Fontolan, V., Buffarah, G., & Peixoto-Junior, K. (2006). In situ digestibility of sugar-cane (Saccharum officinarum) as fresh forage or silage, with or without urea. Brazilian Journal of Veterinary Research and Animal Science, 43(4), 502-509. https://doi.org/10.11606/issn.1678-4456.bjvras.2006.26466
Section
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