Influência da monensina sódica no consumo e na digestibilidade de dietas com diferentes teores de proteína para ovinos

Oliveira, Marcus Vinícius Morais de; Lana, Rogério de Paula; Eifert, Eduardo da Costa; Luz, Dirce Ferreira; Pereira, José Carlos; Pérez, Juan Ramón Olalquiaga; Vargas, Fernando Miranda de

doi:10.1590/s1516-35982007000300018

Cited by 18 publications

(19 citation statements)

References 33 publications

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“…A similar result was found by Oliveira et al (2007), who suggested a correlation between excess ammonia in the rumen and excess urea in the liver tissue, with a consequent reduction in salivary nitrogen recycling and the elimination of excess nitrogen by the kidneys through the urine. In the present study, there was no negative NB, nor were there differences in retained N/ingested N or retained N/absorbed N between treatments, thus indicating that the CP intake met the requirements of the animals.…”

Section: Nitrogen Balance (Nb) and Microbial Efficiencysupporting

confidence: 85%

Effects of diets with high and low protein contents and two concentrate levels in Santa Ines×Texel lambs

et al. 2015

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a b s t r a c tTwo experiments were conducted to evaluate the effects of diets containing two levels of crude protein (CP) and concentrates on the intake, total nutrient digestibility, nitrogen balance (NB), microbial efficiency, and performance of lambs. The diets consisted of 10% or 14.25% CP and 40% or 60% concentrate, with corn silage as the forage. In the digestibility assay, four intact male F1 Santa Ines Â Texel lambs, with an average body weight of 21.0 7 2.48 kg and rumen-cannulated, were used. The lambs were distributed in a 4 Â 4 Latin square design with four treatments and four periods. There was no effect of the CP Â concentrate interaction on the variables that were studied. There was an effect of CP levels on the intake and digestibility of CP, as well as on the amounts of N that were ingested, absorbed, and retained from urine (NB). There was also an effect of CP levels on uric acid excretion. In the performance assay, 32 intact F1 Santa Ines Â Texel lambs with an average body weight of 19.0 7 2.02 kg were used. They were distributed in a 2 Â 2 factorial arrangement of treatments in a randomized block design with eight replicates. There was a significant interaction between CP and concentrate levels on the ether extract (EE) intake. The CP level affected the intake of dry matter (DM), organic matter (OM), CP, neutral detergent fiber corrected for ash and protein (apNDF), non-fiber carbohydrates (NFC), total digestible nutrients (TDN), and rumen-degraded protein (RDP), as well as the carcass gain (CG) and the feed conversion (FC). Concentrate levels affected the intake of DM, OM, CP, NFC, TDN, and RDP, as well as the CG, the CG/average daily gain (ADG), and the FC. It was concluded that levels of CP and concentrate do not affect microbial efficiency or nutrient digestibility, except for CP digestibility. A high level of CP or concentrate in the diet results in greater nutrient intake and better animal performance.

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Section: Nitrogen Balance (Nb) and Microbial Efficiencysupporting

confidence: 85%

Effects of diets with high and low protein contents and two concentrate levels in Santa Ines×Texel lambs

et al. 2015

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“…Crude brown propolis promoted higher EE digestibility compared with monensin sodium (Table 4). Oliveira et al (2007) did not observe any effect of monensin sodium inclusion at 28 mg/kg DM in lamb diets with a 65:35 roughage:concentrate ratio. Prado et al (2010) observed a reduction in EE digestibility in cattle supplemented daily with 2.0 g of freeze-dried propolis extract/animal and attributed this response to the inhibition of rumen-lipolytic microorganisms.…”

Section: Discussionmentioning

confidence: 59%

Effects of dietary brown propolis on nutrient intake and digestibility in feedlot lambs

Silva

Ítavo

et al. 2014

R. Bras. Zootec.

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-The present study tested brown propolis in crude or extract form as a feed supplement for feedlot lambs to identify the type that most improves in vivo nutrient digestibility. Digestibility was assessed by both total fecal collection and internal markers and the results obtained by these techniques were compared. The completely randomized design was used to compare feed intake and nutrient digestibility of 24 male lambs aged seven months among four dietary treatments (crude brown propolis, propolis ethanol extract, monensin sodium, and control). Methods of feces collection were compared using a completely randomized split-plot design, with experimental diets corresponding to the main factor and the methods to estimate fecal production as the sub-factor. The diets had a roughage:concentrate ratio of 50:50, with Tifton-85 bermudagrass hay (Cynodon spp.) as roughage, and ground corn, soybean meal and minerals as concentrate. The lambs fed diets with crude propolis had higher feed intake than those fed diets containing monensin sodium. The different diets did not affect dry matter, organic matter, crude protein, neutral detergent fiber, or acid detergent fiber digestibility, but crude propolis supplementation provided higher ether extract digestibility than monensin sodium. Nutrient digestibility, as indicated by indigestible neutral detergent fiber, indigestible acid detergent fiber and sequentially-determined indigestible acid detergent fiber, was lower than that found with the fecal collection method. The addition of brown propolis has the same effect as monensin, but neither maximized nutrient availability in the diet of feedlot lambs at 7 months of age. Digestibility assessment using the internal markers indigestible neutral detergent fiber, indigestible acid detergent fiber and sequentially-determined indigestible acid detergent fiber is not an efficient method compared with total feces collection.

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“…Borges et al (2008) also obtained a non-significant increase in the digestibility coefficient of ruminally cannulated cows of 66.4% vs 60.4% for treatment with monensin and control, respectively. Zeoula et al (2008) found an increase of 8% in AD of DM with the use of monensin, and an increase in total digestibility of CP in the intestine, while Oliveira et al (2007) did not obtain alterations in the digestibility of DM and nutrients for sheep supplemented with monensin. Ionophores regularly have the action of increasing the digestibility of DM and starch in food based on grains, because there is a decrease in food intake; consequently, ruminal microflora have more time for digestion, considering the decrease in the rate of passage (RUSSELL; HOULIHAN, 2003).…”

Section: Resultsmentioning

confidence: 99%

“…Such increases can be explained by the increase in metabolizable energy of the feed. According to Oliveira et al (2007), higher fat deposition may be due to an increase in the total production of short chain fatty acids, concomitant with a reduction in methane production.…”

Section: Resultsmentioning

confidence: 99%

Growth performance and safety of meat from cattle feedlot finished with monensin in the ration

Neumann¹,

Ueno²,

Heker³

et al. 2018

SCA

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Monensin is an ionophore antibiotic, the inclusion of which in the feed of beef cattle favors the best use of feed nutrients, via ruminal modulation. However, there are concerns regarding the residence of residues in the carcass from metabolism of monensin. The objective of this study was to evaluate the productive performance, carcass characteristics, serum parameters, tissue residual depletion and economic benefit of finishing of young bulls in confinement with monensin in the ration. Thirtysix animals were confined, and given 50% corn silage feed and 50% more concentrated feed. The experimental design was completely randomized, with two treatments (with or without monensin) and 10 replicates for the control group and eight for the monensin group. The use of monensin reduced the dry matter intake in relation to live weight (2.36% vs 2.55%), and improved feed conversion (8.61 vs 10.06 kg kg −1 ); the animals presented higher live weight (511 vs 494 kg), higher warm carcass weight (285 vs 272 kg) and an increase in fat thickness (4.97 vs 4.25 mm) compared to control animals. These increases in performance gave higher economic results, with a profit margin of R$ 122.84 per animal. A waiting period of 16 h before slaughter resulted in monensin concentrations below 0.25 µg kg −1 in edible organs and tissues, values well below those permitted by legislation. The use of monensin for young bulls in confinement promoted improvements in productive and economic performance, without leaving residues in edible tissues. ResumoA monensina é um antibiótico ionóforo, cuja inclusão na alimentação de bovinos de corte favorece o melhor aproveitamento dos nutrientes da ração, via modulação ruminal. Porém há preocupações no que tange a permanência de resíduos na carcaça, provenientes da metabolização da monensina. Assim, objetivou-se avaliar o desempenho produtivo, as características de carcaça, os parâmetros séricos, a depleção residual tecidual e a economicidade da terminação de tourinhos em confinamento com monensina na ração. Foram confinados 36 animais com ração 50% de silagem de milho mais 50% concentrado. O delineamento experimental foi inteiramente casualizado, com 2 tratamentos (com ou sem monensina) e 10 repetições para o grupo controle e 8 para o grupo com monensina. O uso de monensina reduziu o consumo de matéria seca em relação ao peso vivo (2,36 vs 2,55%), melhorou a conversão alimentar (8,61 vs 10,06 kg kg -1 ), os animais apresentaram maior peso vivo (511 vs 494 kg), maior peso de carcaça quente (285 vs 272 kg) e aumento na espessura de gordura (4,97 vs 4,25 mm) comparativamente aos animais da ração controle. Tais acréscimos em desempenho conferiram maiores resultados econômicos, com margem de lucro de R$ 122,84 por animal. O período de carência de 16 horas antes do abate apresentou concentrações de monensina inferiores a 0,25 µg kg -1 nos órgãos e tecidos comestíveis, valores muito abaixo dos permitidos na legislação. O uso de monensina para tourinhos em confinamento promoveu melhorias no desempenho produt...

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Influência da monensina sódica no consumo e na digestibilidade de dietas com diferentes teores de proteína para ovinos

Cited by 18 publications

References 33 publications

Effects of diets with high and low protein contents and two concentrate levels in Santa Ines×Texel lambs

Effects of diets with high and low protein contents and two concentrate levels in Santa Ines×Texel lambs

Effects of dietary brown propolis on nutrient intake and digestibility in feedlot lambs

Growth performance and safety of meat from cattle feedlot finished with monensin in the ration

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