Chitosan affects total nutrient digestion and ruminal fermentation in Nellore steers

Autor(es):Mostrar menos -

Araujo, A. P. C. ^[1] ; Venturelli, B. C. ^[1] ; Santos, M. C. B. ^[1] ; Gardinal, R. ^[1] ; Consolo, N. R. B. ^[1] ; Calomeni, G. D. ^[1] ; Freitas, J. E. ^[1] ; Barletta, R. V. ^[1] ; Gandra, J. R. ^[1] ; Paiva, P. G. ^[2] ; Renno, F. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Anim Nutr & Prod, Sch Vet Med & Anim Sci, BR-13635900 Pirassununga, SP - Brazil

^[2] UNESP Univ Estadual Paulista Julio de Mesquita Fi, Dept Anim Sci, BR-14884900 Jaboticabal, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ANIMAL FEED SCIENCE AND TECHNOLOGY; v. 206, p. 114-118, AUG 2015.
• Citações Web of Science: 16

Resumo

This study aimed to investigate the effects of chitosan on dry matter intake (DMI), nutrient digestibility, ruminal fermentation, and blood metabolites in Nellore steers. Eight ruminally cannulated Nellore steers (540 +/- 28.5 kg of BW) were used in a replicated 4 x 4 Latin square design, with 21-d of experimental periods. The animals were randomly assigned to the following treatments: control (without chitosan addition; Q0), Q50, Q100 and Q150, by dosing 50, 100 and 150 mg/kg BW chitosan, respectively, through the cannula. Although there was no difference on DMI, chitosan addition increased dry matter, neutral detergent fiber, and crude protein apparent total-tract digestibility (P < 0.05). Ruminal pH was not affected, whereas NH3 N concentration was quadratically affected with chitosan addition (P = 0.01). There were no differences in total volatile fatty acids concentration among treatments. Chitosan had a quadratic effect on propionate and butyrate, whereas acetate molar proportions decreased linearly (P < 0.05). Acetate:propionate ratio decreased with chitosan addition (P < 0.05). Plasma glucose concentration was higher with chitosan addition (P < 0.05); however, total protein, urea, aspartate aminotransferase, and gamma-glutamyl transferase were not affected by chitosan. Addition of chitosan altered ruminal fermentation, improved nutrient digestibility, and did not appear to damage animal health. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/01967-7 - Desempenho produtivo, digestão e metabolismo em bovinos alimentados com diferentes concentrações de quitosana nas dietas
• Beneficiário: Francisco Palma Rennó
• Modalidade de apoio: Auxílio à Pesquisa - Regular