Whole linted cottonseed meal (Gossypium hirsutum L.) protein and fiber degradability in the rumen

  • Deborah Clea Ruy Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, São Paulo, SP
  • Carlos de Sousa Lucci Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, São Paulo, SP
  • Laércio Melotti Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, São Paulo, SP
  • Milton Luiz Moreira Lima Universidade de São Paulo, Escoia Superior de Agronomia Luiz de Queiroz , São Paulo, SP
Keywords: Fistula, Bovidae, Cottonseed, Digestibility, Ruminants.

Abstract

Evaluation of “in situ" degradability of DM, CP and ADF of whole linted cottonseed (WLC) when used up to 15% of the diet (dry matter basis), replacing cottonseed meal, was the main purpose of this experiment. Sorghum silage (SS) was the only roughage. Ruminal pH and rumen kinetics were also evaluated. Nine ruminal canulated steers were used in a
3 x 3 change-over design to evaluate the following treatments: A = 0% WLC; B = 6.6% WLC; and C = 15.0% WLC. Sorghum silage contributed with 70% in all three treatments. DM degradability at 48h incubation time was statistically different (p < 0.05) (A = 54.4%; B = 54.2% and C = 58.7%), as well as PB degradability at 12h (A = 40.3%; B = 47.7% and C = 53.1%) and ADF degradability at 48h (A = 40.3%; B = 41.2% and C = 45.6%). Ruminal volume, turn overtime and ruminal pH weren’t affected by the experimental diets. Substitution of WLC for cottonseed meal up to 15% diet increased degradability of DM, CP and ADF of WLC.

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Published
1996-12-03
How to Cite
Ruy, D. C., Lucci, C. de, Melotti, L., & Lima, M. L. (1996). Whole linted cottonseed meal (Gossypium hirsutum L.) protein and fiber degradability in the rumen. Brazilian Journal of Veterinary Research and Animal Science, 33(supl.), 276-280. https://doi.org/10.11606/issn.2318-3659.v33isupl.p276-280
Section
ANIMAL NUTRITION AND NUTRITIONAL DISEASES

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