Desempenho, características de carcaça e expressão de genes em tourinhos alimentados com lipídeos e monensina

Ladeira, Márcio Machado; Neto, Otávio Rodrigues Machado; Santarosa, Leonardo de Castro; Chizzotti, Antônio; Oliveira, De; Carvalho, José Rodolfo Reis de; Alves, Maria Cecília Lemes

doi:10.1590/s0100-204x2014000900009

Cited by 6 publications

(6 citation statements)

References 32 publications

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“…Feed additives are an important aspect of dietary management to enhance feed efficiency and profitability in grazing beef cattle systems ( Berchielli and Bertipaglia, 2010 ) by altering rumen environment and fermentation routes and increasing energy and nitrogen efficiency metabolism ( Tedeschi et al, 2003 ). Ionophores are the most studied and used feed additives in cattle, mainly for optimizing rumen fermentation and reducing the rates of digestive disorders ( Ladeira et al, 2014 ). Nevertheless, the proportion of studies evaluating the use of ionophores in ruminants fed high-forage diets is limited compared with studies evaluating high-concentrate diets ( Goodrich et al, 1984 ; Tedeschi et al, 2003 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of narasin supplementation frequency on intake, ruminal fermentation parameters, and nutrient digestibility of Bos indicus Nellore steers fed with forage-based diets

Soares

Marques

Pires

et al. 2021

Translational Animal Science

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The study aimed to evaluate if the frequency of narasin supplementation impacts dry matter intake, ruminal fermentation parameters, and apparent digestibility of nutrient in Nellore (Bos Indicus) steers fed forage-based diets. Thirty-two rumen-cannulated Nellore steers [initial body weight (BW) = 317 ± 27 kg; age =18 ± 1 mo] were assigned to individual pens in a randomized complete block design according to their initial shrunk BW. Within block, steers were randomly assigned to 1 of 4 treatments: 1) forage-based diet without the addition of narasin (CON; n = 8), 2) CON diet plus 13 ppm of narasin every 24 hours (N24; n = 8), 3) CON diet plus 26 ppm of narasin every 48 hours (N48; n = 8), or 4) CON diet plus 39 ppm of narasin every 72 hours (N72; n = 8). The experimental period lasted 30 d, with 18 d for diet adaptation and 12 d for sample collection. The experimental diets contained 95% of Tifton-85 (Cynodon dactylon spp.) haylage and 5% ground corn used as a delivery vehicle for narasin. Ruminal fluid was obtained from d 25 to 30 at 6 h after feeding to determine ruminal fermentation parameters. Narasin supplementation frequency did not affect (P ≥ 0.22) nutrient intake and total tract apparent digestibility. Steers fed N24 and N48 had reduced (P = 0.02) ruminal acetate concentration compared with CON and N72. Daily supply of narasin increased (P = 0.01) the molar proportion of propionate compared with CON and N72, and it did not differ between N24 vs. N48, N48 vs. N72, and N72 vs. CON. Also, N48 steers had greater (P = 0.01) rumen propionate concentration compared with CON. The N24 treatment decreased the Ac: Prop (P = 0.01) and AcBut: Prop (P = 0.02) ratio compared with CON and N72, while N48 had reduced (P = 0.01) Ac: Prop and AcBut: Prop ratio when compared with CON steers. Steers fed N24 and N48 had greater (P = 0.04) ruminal SCFA compared with CON, but it did not differ (P > 0.11) between N24, N48, and N72. Supplementing narasin to steers fed forage-based diets decreased (P < 0.01) ruminal ammonia concentration compared with CON steers regardless of supplementation frequency, being the least result observed for N24 steers. Collectively, narasin supplementation frequency affected fermentation parameters without altering the nutrient intake and total tract apparent digestibility. Hence, decreasing frequency of narasin supplementation to Nellore steers fed a forage-based diet did not reduce the capacity to modulate rumen fermentation parameters.

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Section: Introductionmentioning

confidence: 99%

Effects of narasin supplementation frequency on intake, ruminal fermentation parameters, and nutrient digestibility of Bos indicus Nellore steers fed with forage-based diets

Soares

Marques

Pires

et al. 2021

Translational Animal Science

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“…The ionophore Monensin is the most commonly used feed additive in feedlot diets to improve the efficiency of ruminal fermentation (TEDESCHI et al, 2011). Effects include a decrease in the acetate: propionate ratio, improvement of feed efficiency, reduction of rumen deamination, decreases in CH 4 production, and the risks of metabolic diseases (DINIUS et al, 1976this research sought to increase the knowledge around$\\$nthe real-life experience of Jatropha farming in the southern India$\\$nstates of Tamil Nadu and Andhra Pradesh.…”

Section: Introductionmentioning

confidence: 99%

“…By 2010,$\\$n85{%} (n = 90; RUSSELL; STROBEL, 1989). Despite advantageous benefits of Monensin, growing public concerns over chemical residues in animal-derived foods, threats of antibiotic-resistant bacteria and an outright ban by the European Union (TEDESCHI et al, 2011), the animal feed industry have renewed their interest in exploring the use of safer alternatives in substitution of chemical feed additives historically used for ruminant livestock feeding.…”

Section: Introductionmentioning

confidence: 99%

“…Several natural alternatives such as plants, plant extracts, and secondary metabolites (e.g. tannins, saponins, and essential oils) with antibioticlike action potential have received considerable attention as natural ways to manipulate ruminal fermentation (MEZZOMO et al, 2011ruminal and total digestibility, ruminal digestion rate, protein efficiency, and microbial efficiency in beef steers fed high concentrate diet (87% of DM;TEDESCHI et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Effects of tannins and Monensin in a feedlot diet on in vitro ruminal fermentation

Martello

Paula

Macedo

et al. 2019

SCA

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The objective of this study was to evaluate the effects of tannins versus Monensin on in vitro ruminal fermentation of a feedlot diet. The treatments were: control (no additives); low tannin (2 mg g DM-1); medium tannin (4 mg g DM-1), high tannin (6 mg g DM-1), and Monensin (0.02 mg g DM-1). The substrate was a feedlot diet composed by hay and concentrate (15:85 w/w; DM basis). Ruminal fluid was obtained from three rumen-cannulated male Santa Inês sheep. In vitro incubations were carried out during four consecutive weeks (run). Gas production (GP) was recorded at 1, 2, 3, 4, 5, 6, 8, 10, 12, 18, 24, 30, 36, 42, 48, 60, 72, 84, and 96 h of incubation. At 48 and 96 h, two bottles per treatment were withdrawn to measure pH, ammonia concentration (NH3), volatile fatty acid (VFA), in vitro dry matter digestibility (IVDMD), and in vitro neutral detergent fiber digestibility (IVNDFD). Addition of tannin or Monensin did not affect (P > 0.05) the kinetics parameters. Tannin supplementation reduced (P < 0.05) the GP at 24 h compared to Monensin. Addition of Monensin decreased (P < 0.05) IVDMD at 96 h and IVNDFD at 48 and 96 h compared to the control. The IVNDFD was lower (P < 0.05) with Monensin than with tannin at 48 and 96 h. The NH3 was lower (P < 0.05) with tannin compared with Monensin. By increasing tannin dosage, NH3 levels changed quadratically (P < 0.05). The inclusion of tannin in vitro reduced the NH3 concentration considerably when used in low dose.

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“…Assim, tem aumentado, ao longo dos últimos anos, a utilização de dietas para animais em confinamento, com alta inclusão de concentrado e de aditivos (Graminha et al, 2007) para otimizar a fermentação ruminal e reduzir os índices de distúrbios digestivos (Ladeira et al, 2014). A monsensina sódica é o aditivo mais utilizado e estudado mundialmente em bovinocultura, porém, há relatos promissores relacionados ao uso de prebióticos, probióticos e enzimas na dieta de bovinos de corte (Stein et al, 2006).…”

Section: Introductionunclassified

Simbióticos e monensina sódica no desempenho e na qualidade da carne de novilhas mestiças Angus confinadas

Ribeiro

Jorge

Francisco

et al. 2015

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito da inclusão de simbióticos e de monensina sódica em dietas sobre o desempenho, as características de carcaça e a qualidade da carne de novilhas mestiças Angus em confinamento. Utilizou-se um delineamento inteiramente casualizado, com 64 animais distribuídos em quatro tratamentos: controle, dieta sem suplementação; dieta suplementada com simbióticos; dieta com monensina sódica; e dieta com simbióticos e monensina sódica. A dieta com monensina sódica e a dieta com simbióticos e monensina sódica proporcionaram maior ganho de peso médio diário e ganho de peso vivo total, além de melhorar a eficiência alimentar e biológica dos animais em comparação ao controle. A dieta de simbióticos, a de monensina e a de simbióticos com monensina sódica ocasionaram a redução da ingestão de matéria seca, elevaram o peso do filé da costela e os teores de lipídeos totais na carne. A dieta com simbióticos proporcionou a redução da força de cisalhamento da carne em relação ao controle. A inclusão de simbióticos, com ou sem monensina sódica, na dieta de novilhas mestiças Angus confinadas, beneficia o desempenho animal e algumas características físico-químicas da carne.Termos para indexação: bovino de corte, composição química da carne, eficiência alimentar, força de cisalhamento, ganho de peso vivo. Synbiotics and sodic monensin on performance and meat quality of Angus crossbred heifers on feedlotAbstract -The objective of this work was to evaluate the effect of inclusion of synbiotics and sodic monensin on the performance, carcass characteristics, and meat quality of Angus crossbred heifers on feedlot. A completely randomized block design was carried out with 64 animals distributed in four treatments: control, a diet without supplementation; a diet supplemented with synbiotics; a diet with sodic monensin; and a diet with synbiotics and sodic monensin. The diet with sodic monensin and the diet with synbiotics and sodic monensin increased the average daily gain and total live weight gain, besides improving the feed and biological efficiency of animals compared to control treatment. The diet with synbiotics, with sodic monensin, and with synbiotics and sodic monensin decreased dry matter intake, and increased the rib fillet weight (noix) and the total lipid concentration in the meat. The diet with synbiotics facilitated the reduction of meat shear force compared to control treatment. The inclusion of synbiotics, with or without sodic monensin, in diet of Angus crossbred heifers, improves animal performance on feedlot and some physicochemical characteristics of meat.Index terms: beef cattle, chemical composition of meat, feed efficiency, shear force, body weight gain. IntroduçãoA atividade pecuária bovina é um dos setores mais importantes do agronegócio brasileiro e da economia nacional. O Brasil é conhecido pelo alto potencial de produção no setor pecuário por possuir, atualmente, o maior rebanho comercial de bovinos, que classifica o país como o maior exportador e o segundo maior prod...

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Desempenho, características de carcaça e expressão de genes em tourinhos alimentados com lipídeos e monensina

Cited by 6 publications

References 32 publications

Effects of narasin supplementation frequency on intake, ruminal fermentation parameters, and nutrient digestibility of Bos indicus Nellore steers fed with forage-based diets

Effects of narasin supplementation frequency on intake, ruminal fermentation parameters, and nutrient digestibility of Bos indicus Nellore steers fed with forage-based diets

Effects of tannins and Monensin in a feedlot diet on in vitro ruminal fermentation

Simbióticos e monensina sódica no desempenho e na qualidade da carne de novilhas mestiças Angus confinadas

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