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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Effects of a blend of essential oils, chitosan or monensin on nutrient intake and digestibility of lactating dairy cows

Texto completo
Autor(es):
Vendramini, T. H. A. [1] ; Takiya, C. S. [1] ; Silva, T. H. [1] ; Zanferari, F. [1] ; Rentas, M. F. [1] ; Bertoni, J. C. [1] ; Consentini, C. E. C. [1] ; Gardinal, R. [1] ; Acedo, T. S. [2] ; Renno, F. P. [1]
Número total de Autores: 10
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Anim Nutr & Prod, Pirassununga - Brazil
[2] DSM Nutr Prod Brazil Ltd, Sao Paulo - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: ANIMAL FEED SCIENCE AND TECHNOLOGY; v. 214, p. 12-21, APR 2016.
Citações Web of Science: 10
Resumo

This study was undertaken to determine the effects of a blend of essential oils, chitosan or monensin on nutrient intake and digestibility, nitrogen utilization, microbial protein synthesis, ruminal fermentation, and blood profile of mid- to late-lactating Holstein cows. The secondary objective of this study was to evaluate the effects of additives on milk yield and composition of animals. Twenty-four multiparous cows (average 31.44 +/- 4.83 kg/day of milk yield and 175.89 +/- 99.74 days in milk, mean +/- SD) were distributed into a replicated 4 x 4 Latin square experimental design. Periods consisted of 14 days of adaptation to treatments and 7 days of sampling. Cows were randomly assigned to receive one of the four treatments: (1) Control (CON); (2) Essential oils (EO), supply of 1 g/day of EO mixture (Crina (R) Ruminants-DSM Nutritional Products Brazil Ltd., Sao Paulo, Brazil; composed by thymol, guaiacol, eugenol, vanillin, salicylaldehyde and limonene); (3) Chitosan (CHI), dietary inclusion of 150 mg/kg BW of CHI; and (4) Monensin (MON), dietary inclusion of 24 mg/kg DM of sodic monensin (Monensin Tortuga-DSM Nutritional Products Brazil Ltd., Sao Paulo, Brazil). Treatments did not influence nutrient intake, milk yield and composition. Animals fed CHI showed higher DM digestibility than those fed EO. Cows fed MON or CHI had higher CP digestibility than cows fed EO. However, animals fed additives had similar nutrient digestibility compared to CON. Fecal nitrogen excretion was lower for cows fed CHI or MON than those fed EO, but the feed additives did not alter nitrogen excretion compared to CON. Treatments did not affect microbial protein synthesis and efficiency. Cows fed MON had lower acetate to propinate ratio than CON or EO. Blood profile was not altered by treatments. Feed additives did not influence nutrient intake, but altered nutrient digestibility and ruminal fermentation. Monensin shifted ruminal fermentation to a more energetically efficient pathway. Milk and solids yield were not affected by treatments. (C) 2016 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 13/24597-6 - Avaliação de Diferentes Aditivos na Alimentação de Vacas Leiteiras
Beneficiário:Thiago Henrique Annibale Vendramini
Linha de fomento: Bolsas no Brasil - Mestrado