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Óleo funcional na dieta de vacas leiteiras

Authors: Jesus, Elmeson Ferreira de;

Óleo funcional na dieta de vacas leiteiras

Abstract

O presente estudo teve como objetivo avaliar os efeitos da inclusão de óleo funcional composto de ácido anacárdico, cardol e cardanol (óleo da castanha de cajú) e ácido ricinoleico (óleo de mamona) na dieta de vacas em lactação sobre consumo, digestibilidade aparente total da matéria seca e nutrientes, fermentação ruminal, produção e composição do leite, síntese de proteína microbiana, perfil metabólico, balanço de nitrogênio e energia. Foram utilizadas vinte e quatro vacas pluriparas da raça Holandês, das quais seis apresentavam cânula ruminal, com peso corporal médio de 618 ± 76 kg, 150,24 ± 91,43 dias em lactação e 29,1 ± 4,01 kg/dia de produção de leite no início do experimento. As vacas foram alocadas em oito Quadrados Latinos 3 x 3, balanceados e contemporâneos, alimentadas com os seguintes tratamentos: 1) controle (CON), composto por dieta basal sem inclusão de aditivos; 2) óleo funcional (OF), com adição de 500 mg/kg da MS (Essential® Oligo Basics) e 3) monensina sódica (MON) com adição de 22 mg/kg da MS. Não houve efeito (P>0,05) dos tratamentos sobre o consumo de matéria seca e nutrientes (kg/dia), coeficientes de digestibilidade e consumo em porcentagem do peso corporal. A inclusão de óleo funcional ou monensina sódica na dieta não alterou (P>0,05) o pH, as concentrações de amônia, acetato e butirato, e a relação acetato: propionato no rúmen. No entanto, as inclusões de óleo funcional ou monensina sódica aumentaram (P0,05). A inclusão de óleo funcional ou monensina sódica nas dietas aumentaram a produção de leite e a concentração de propionato ruminal, sem alterar o consumo e a digestibilidade da matéria seca e nutrientes.

This study aimed to evaluate the effects of the inclusion of functional oil composed of anacardic acid, cardol and cardanol (cashew nut shell liquid and castor oil) and ricinoleic acid (castor oil) in diets of dairy cows on intake, total apparent digestibility of dry matter and nutrients, rumen fermentation, milk yield and composition, microbial protein synthesis, metabolic profile, and nitrogen and energy balance. Twenty-four multiparous Holstein cows (six cannulated in the rumen), with an average body weight of 618 ± 76 kg, 150.24 ± 91.43 days in lactation and milk yield of 29.1 ± 4.01 kg/day in the beginning of the study were evaluated. Cows were allocated into eight 3 x 3 Latin squares, balanced and contemporary, and fed with the following treatments: 1) control (CON), composed of basal diet without inclusion of additives; 2) Functional oil (FO) with addition of 500 mg/kg DM (Essential® Oligo Basics) and 3) monensin (MON) with addition of 18 mg/kg DM. There was no effect (P>0.05) of treatments on dry matter and nutrients intake (kg/day), digestibility and intake as percentage of body weight. The inclusion of functional oil or monensin in the diet did not affect (P>0.05) pH, ammonia, acetate and butyrate concentrations and acetate: propionate ratio in the rumen. However, the inclusions of functional oil or monensin increased (P0.05). Inclusion of functional oil or monensin in the diets increased milk yield and concentration of ruminal propionate without changing intake and digestibility of dry matter and nutrients.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Pós-graduação em Zootecnia - FCAV

Country
Brazil
Keywords

Óleo funcional, Productive performance, Monensina, Dempenho produtivo, Antimicrobial, Monensin, Antimicrobiano, Functional oil

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green