Does virginiamycin supplementation affect the metabolism and performance of Nellore bulls grazing under low and high gain rates?

Costa, J.M.G. Sá da; Jesus, Raphael Barbetta de; Oliveira, Ivanna Moraes de; Resende, Flávio Dutra de; Siqueira, Gustavo Rezende; Malheiros, Euclides Braga

doi:10.1111/asj.13052

Cited by 5 publications

(6 citation statements)

References 42 publications

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“…Generally, virginiamycin did not cause any effect on voluntary intake and digestibility. This pattern agrees with several experiments carried out in the tropics (Moncão, 2017;Alves Neto et al, 2018;Costa et al, 2018). On the other hand, some authors stated that virginiamycin could decrease the voluntary intake of supplements (Maciel et al, 2019), which V, S, and V × S, effects of virginiamycin, supplement type, and their interaction, respectively.…”

Section: Discussionsupporting

confidence: 89%

“…According to Salinas-Chavira et al (2009), virginiamycin tends to improve feed efficiency in cattle, but its effects on ruminal fermentation and digestion are small and cannot be responsible for improvements in performance. Several researches also have demonstrated either absence of impacts or only marginal effects of virginiamycin on rumen fermentation characteristics (Nagaraja et al, 1987;Moncão, 2017;Alves Neto et al, 2018;Costa et al, 2018). Costa et al (2018) found an increment in microbial N production in the rumen with virginiamycin supplementation, which was probably caused by a decreased predation activity.…”

Section: Discussionmentioning

confidence: 99%

“…Simultaneously, virginiamycin caused a decrease in the rumen protozoa population, which may imply in a decreased predation activity (Squizatti et al, 2019a;Squizatti et al, 2019b). Moreover, studies on the inclusion of virginiamycin in grazing cattle diets indicated either an improvement in animal performance (Alves Neto et al, 2018;Costa et al, 2018) or a maintenance of performance but with improvement in feed efficiency (Maciel et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Association of virginiamycin and multiple supplement for cattle fed a high-quality tropical forage

et al. 2022

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The aim of this study was to evaluate the effect of adding virginiamycin to either mineral mixture or multiple supplement on intake, digestion, ruminal fermentation profile, rumen microbial production, blood metabolites, and liver metabolism of zebu heifers fed a high-quality tropical forage. Eight Brahman heifers were assigned to a replicated 4 × 4 Latin Square design. The treatments were: mineral mixture, mineral mixture with virginiamycin, multiple supplement, and multiple supplement with virginiamycin. The basal diet consisted of a high-quality Tifton 85 hay (Cynodom sp.) chopped at 10-cm particle size and fed twice daily. The mineral mixture was provided daily at 120 g/animal. The multiple supplement was formulated to provide 300 g of crude protein (CP)/kg as fed, contained mineral mixture, corn grain, and urea: ammonium sulfate, and was daily provided at 200 g/animal. The mineral mixture and multiple supplement provided the same daily amount of minerals. The amount of supplemental virginiamycin was based on a maximum theoretical response on animal performance (50 mg/100 kg body weight) and daily mixed to the supplements types. The treatments were compared according to a 2 × 2 factorial arrangement (mineral mixture and multiple supplement, with or without virginiamycin). The virginiamycin supplementation did not alter either voluntary intake or digestibility (P≥0.44). Using the multiple supplement decreased forage (P<0.05) and digested organic matter (DOM, P<0.10) intake, but increased dietary CP : DOM ratio (P<0.01). The multiple supplement increased the ruminal ammonia concentration (P<0.04) and the acetate-to-propionate ratio (P<0.06). Virginiamycin increased urinary nitrogen (N) when provided along with multiple supplement (P<0.05). Fecal N was decreased by multiple supplement (P<0.06). Despite these effects, no effect was verified on either body N accretion (P≥0.48) or microbial N production in the rumen (P≥0.27). Virginiamycin decreased the blood IGF-1 (P<0.07). The hepatic gene expression for propionyl-CoA carboxylase was increased by virginiamycin (P<0.01). Virginiamycin increased the hepatic gene expression of both citrate synthase and pyrivate carboxylase when mineral mixture was provided (P<0.01), but decreased it when animals were fed multiple supplement (P<0.04). Using a low-intake multiple supplement with a high CP content for cattle fed high-quality forage causes a substitutive effect on forage intake, but keeps nitrogen accretion unchanged. That pattern indicates an improvement in feed efficiency. On the other hand, virginiamycin supplementation seems to cause some post-prandial influences, which may vary according to the type of supplement. Those influences apparently improve animal efficiency.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Association of virginiamycin and multiple supplement for cattle fed a high-quality tropical forage

et al. 2022

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“…Roth et al, (2019), evidenciaram o uso de suplementação dos bovinos de corte de 16 meses de idade, a intensificação ajuda a potencializar o aumento do peso do animal, bem como melhora o rendimento da carcaça e da carne, também tem como benefício o encurtamento do ciclo de vida. Todas as estratégias utilizadas durante a recriam afetam diretamente o desempenho futuro dos animais e aqueles que durante essa fase obtiverem variáveis diferentes, iniciam a fase terminação também com índices corporais diferentes, isso gera carcaças de pesos desuniformes, consequentemente, acarretando resultar em variação na remuneração final pela falta de padronização do produto final (Costa, et al, 2018).…”

Section: Salinasunclassified

Recria intensiva em confinamento como estratégia de manejo em bovinos de corte - revisão de literatura

Batistelli

Bess

et al. 2022

RSD

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Esta revisão de literatura tem como objetivo explanar questões sobre a estratégia de recria intensiva de bezerros de corte de bezerros confinados no momento da recria, principalmente no período de seca, com destaque na intensificação da recria e redução da pressão de pastejo. No Brasil, o sistema de produção predominante na a pecuária de corte, é o sistema extensivo que no qual a base é principalmente em regime de pastagens tropicais e temperadas, ainda com dificuldade de transferência de tecnologia por parte dos técnicos, as informações ao produtor do uso de suplementação alimentar e sal mineral. Nesse cenário, não há investimento substancial, e simultaneamente outro fator a ser considerado a época da seca, em que os animais não conseguem obter resultados positivos com ganhos de peso razoável, ou até mesmo a sua própria manutenção de desempenho corporal. Para que a terminação ocorra de maneira mais rápida ao longo de todo o processo, tem se utilizado a intensificação de bezerros em confinamento na recria, devido esta categoria, apresentar uma exigência nutricional menor, portanto, muitas vezes não priorizada a suplementação e monitoramento da mesma, além de no momento da adaptação ao desmame para a passagem de sua primeira seca a pasto ser substituída pelo resgate. Então a estratégia alimentar de recria proposta favorece o sistema como todo como forma de planejamento e otimização de resultados e redução da taxa de lotação em momentos mais críticos.

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“…Due to the low cost of production and high accumulation of dry mass, tropical forage has been the basis of ruminant feed in the tropics (Costa et al, 2018). However, forage production is not constant throughout the year, and it is necessary to supplement animals during deficit periods (Rigueira et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Nutritional value of pre-dried banana tree pseudostem ammoniated with protected urea

Rigueira

Jesus

Sales

et al. 2020

SCA

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The objective of this study was to evaluate the chemical composition, pH and rumen degradability of banana tree pseudostems pre-dried and ammoniated with different doses of urea (0, 0.5, 1.0, 1.5 and 2.0% in natural matter). The experiment consisted of five treatments (doses of urea) with six replications, following a completely randomized design. There was a linear increase in the pH (P < 0.01) of the banana tree pseudostems pre dried with the inclusion of urea. There was no difference (P > 0.05) in dry matter, ash, neutral detergent fiber, acid detergent fiber, lignin, non-fibrous carbohydrates and total digestible nutrients; the averages were 31.58, 18.82, 46.43, 9.30, 11.87 and 42.52%, respectively. The inclusion of 2% urea increased the crude protein content (P < 0.01) by 42.75%, the soluble fraction "a" by 31.82%, and the potential and effective degradability of dry matter by 15.49% compared to that of the control group (without urea). The potentially degradable fraction, time of colonization and ruminal repletion of the neutral detergent fiber of the pre-dried banana tree pseudostems were not altered with the inclusion of urea (P > 0.05). The ammonization of the pre-dried banana tree pseudostems with 2% of urea improved the chemical composition and rumen degradability of the dry matter.

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Does virginiamycin supplementation affect the metabolism and performance of Nellore bulls grazing under low and high gain rates?

Cited by 5 publications

References 42 publications

Association of virginiamycin and multiple supplement for cattle fed a high-quality tropical forage

Association of virginiamycin and multiple supplement for cattle fed a high-quality tropical forage

Recria intensiva em confinamento como estratégia de manejo em bovinos de corte - revisão de literatura

Nutritional value of pre-dried banana tree pseudostem ammoniated with protected urea

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