Monensin Effects on Rumen Turnover Rate, Twenty-Four Hour VFA Pattern, Nitrogen Components and Cellulose Disappearance

Lemenager, R. P.; Owens, F. N.; Shockey, B. J.; Lusby, K. S.; Totusek, Robert

doi:10.2527/jas1978.471255x

Cited by 98 publications

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“…However, the effect of monensin on digestion has been inconsistent in the past. In various in vitro and in vivo studies, monensin has been reported to depress (Poos et al 1979;Mir 1989), to affect minimally (Dinius et al 1976;Lemenager et al 1978;Ricke et al 1984;Faulkner et al 1985) or not at all (Kone and Galyean 1990;Duff et al 1995), and even to increase (Wedegaertner and Johnson 1983) fiber digestibility. Factors such as daily dosage of monensin, ratio of forage to concentrate consumed and differences in ruminal dilution rates or retention times of digesta (Lemenager et al 1978) may also account for this variability.…”

Section: Monensinmentioning

confidence: 99%

Effects of exogenous fibrolytic enzymes, α-bromoethanesulfonate and monensin on fermentation in a rumen simulation (RUSITEC) system

Yan¹,

Bae²,

McAllister³

et al. 1999

Can. J. Anim. Sci.

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. 1999. Effects of exogenous fibrolytic enzymes, ␣-bromoethanesulfonate and monensin on fermentation in a rumen simulation (RUSITEC) system. Can. J. Anim. Sci. 79: 491-498. The effects of exogenous fibrolytic enzymes, α-bromoethanesulfonate (BES) and monensin on fermentation and digestibility of grass hay were examined using two rumen simulation technique (RUSITEC) devices, each equipped with eight 820-mL fermenters with a liquid dilution rate of 0.73 d -1 . Grass hay (10 g d -1 ) was fed either untreated or pre-treated with 0.2 g each of cellulase and xylanase, and in combination with no chemical or daily dosing of 20.5 µmol monensin, 20.5 µmol BES or 41 µmol BES. Pretreatment of hay with the fibrolytic enzymes increased (P < 0.05) organic matter (OM), cellulose and hemicellulose digestibilities by 9, 15, and 20%, respectively, and increased (P < 0.05) methane production per gram digestible OM by 43%. With the enzyme treatment, both β-endoglucanase and xylanase activities were enhanced (P < 0.05). Application of the enzymes promoted (P < 0.05) the growth of methanogenic bacteria, with no effect on total bacterial or cellulolytic bacterial populations. α-Bromoethanesulfonate did not influence digestibility, but depressed (P < 0.005) methane production by 51%. Addition of BES inhibited (P < 0.05) growth of methanogenic bacteria, with no effect on either the total or cellulolytic bacterial populations. Monensin depressed (P < 0.05) OM, cellulose and hemicellulose digestibilities by 15, 27 and 17%, respectively, and methane production by 78%. Treating grass hay with fibrolytic enzymes enhanced fiber digestion but also methane production. Including BES counteracted the methane production without affecting fiber digestion whereas monensin decreased both fiber digestion and methane production. Sci. 79: 491-498. Nous avons examiné au moyen de deux dispositifs de fermentation ruminale en simulation (RUSITEC), les effets d'enzymes fibrolytiques exogènes, du α-bromoéthanesulfonate (BES) et du monensin sur la fermentation et sur la digestibilité d'un foin de graminées. Chacun des deux dispositif était équipé de 8 fermenteurs de 820 mL de capacité, à un taux de dilution en milieu liquide de 0,73 j -1 . Du foin de graminée (10 g j -1 ) était introduit dans les fermenteurs puis prétraité ou non avec 0,2 g de cellulase et de xylanase. Chaque traitement était couplé ou non à l'injection journalière de 20,5 µmol de monensin, 20,5 µmol de BES ou 41 µmol de BES. Le prétraitement du foin avec les enzymes fibrolytiques a provoqué des accroissements respectifs de 9,15 et 20 % (P < 0,05) de la digestibilité de la m.o., de la cellulose et des hémicelluloses et un accroissement de 43 % (P < 0,05) de la production de méthane par g de m.o. digestible. Dans les traitements avec enzymes, l'activité de la β-endoglucanase et aussi de la xylanase était accrue (P < 0,05). La présence des enzymes exogènes a activé (P < 0,05) la croissance des bactéries méthanogènes, sans agir sur des populations bactériennes totales ni sur les bactéries cellulol...

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Section: Monensinmentioning

confidence: 99%

Effects of exogenous fibrolytic enzymes, α-bromoethanesulfonate and monensin on fermentation in a rumen simulation (RUSITEC) system

Yan¹,

Bae²,

McAllister³

et al. 1999

Can. J. Anim. Sci.

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“…Anim. Sci., 9 (6): 254-265, 2015 the somewhat longer rumen retention time caused by ionophores may contribute to maintenance of normal fiber digestion (Lemenager et al, 1978). Feeding monensin to lactating cows decreased ruminal digestion of OM, acid detergent fiber and starch (Haimoud et al, 1995).…”

Section: Effects Of Ionophores On Energetics Of Ruminal Fermentationmentioning

confidence: 99%

Utility of Ionophores for Ruminant Animals: A Review

Azzaz¹,

Murad²,

Morsy³

2015

Asian J. of Animal Sciences

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Ionophores are feed additives that alter rumen microbial populations through ion transfer across cell membranes. Although ionophores have been used widely in the ruminant's nutrition for improved feed efficiency and control of coccidiosis. Ionophores have been studied regarding several potential effects on ruminant animals, including influences on health, meat production, milk production and reproduction. This review will provide practitioners with relevant references in the published literature regarding ionophore use in ruminants' nutrition. It should also give some guidance as to what effects might be anticipated with the use of ionophores in ruminant animals.

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“…Lemenager et al (1978), Simpson (1978) e Poos et al (1979) registraram que a monensina diminuiu a digestibilidade da fibra ou da MS quando utilizaram animais ou inóculos, quando em experimentos in vitro, não adaptados a este produto.…”

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Monensina e digestibilidade aparente em ovinos alimentados com proporções de volumoso/concentrado

Rodrigues

Mattos

Melotti

et al. 2001

Sci. agric. (Piracicaba, Braz.)

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*Autor correspondente RESUMO: A resposta obtida com a utilização dos ionóforos é influenciada por diversos fatores, entre eles a densidade energética da dieta. Foram objetivos do presente estudo avaliar os efeitos da monensina sobre a digestibilidade total em ovinos submetidos a diferentes dietas. Dezoito animais machos e castrados foram distribuídos em um delineamento inteiramente casualizado com um arranjo fatorial de tratamentos 2 x 3, correspondentes a zero ou 40 mg de monensina sódica por animal e por dia e 25%, 50% ou 75% de concentrados na dieta, composta por mistura de concentrados, a base de milho e farelo de soja, e feno de Coast-Cross. O experimento teve duração total de 25 dias, sendo os 5 últimos destinados à coleta de fezes e urina. A monensina aumentou a digestibilidade total da proteína bruta, avaliada através de coleta total de fezes, independentemente do nível de fibra utilizado (25% de concentrados: 69,6% vs. 65,3%; 50% de concentrados: 72,2% vs. 69,2%; 75% de concentrados: 73,4% vs. 69,8%). A monensina interagiu com o nível de concentrados da dieta para a digestibilidade total da fibra bruta (25% de concentrados: 62,0% vs. 61,0%; 50% de concentrados: 53,2% vs. 59,2%; 75% de concentrados: 51,8% vs. 42,7%) e retenção nitrogenada (25% de concentrados: -3,8 vs. -20,6; 50% de concentrados: -10,4 vs. +2,0; 75% de concentrados: +11,4 vs. +7,9% do N retido em relação ao absorvido), sendo as melhores respostas obtidas na dieta predominantemente concentrada e as piores na dieta mista. Este produto não alterou o consumo de matéria seca, a digestibilidade total da matéria seca, dos extrativos não nitrogenados, do extrato etéreo, da fibra em detergente ácido, da fibra em detergente neutro, da energia bruta e os nutrientes digestíveis totais em qualquer dieta. Palavras-chave: ionóforos, fibra, digestão, ovinos MONENSIN AND TOTAL TRACT DIGESTIBILITY IN WETHERS FED DIFFERENT ROUGHAGE/CONCENTRATE RATIOSABSTRACT: The response to the use of ionophores is influenced by several factors, such as the diet energetic density. The objective of this study was to evaluate the effects of monensin on total tract digestibility in ruminants fed with different diets. Eighteen wethers were randomly exposed to three diets with different concentrate levels (25%, 50% and 75%) without (control) or with monensin (40 mg/animal/day). Experimental period extended for twenty-five days, the last five used for feces and urine collection. The diet consisted of CoastCross hay and a concentrate mixture. Monensin increased total tract digestibility of crude protein, independent of the concentrate level (25%-concentrate: 69.6% vs. 65.3%; 50%-concentrate: 72.2% vs. 69.2%; 75%-concentrate: 73.4% vs. 69.8%). There was an interaction between concentrate level and monensin for total tract digestibility of crude fiber (25%-concentrate: 62.0% vs. 61.0%; 50%-concentrate: 53.2% vs. 59.2%; 75%-concentrate: 51.8% vs. 42.7%) and nitrogen balance (25%-concentrate: -3.8 vs. -20.6; 50%-concentrate: -10.4 vs. +2.0; 75%-concentrate: +11.4 vs....

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Monensin Effects on Rumen Turnover Rate, Twenty-Four Hour VFA Pattern, Nitrogen Components and Cellulose Disappearance

Cited by 98 publications

References 0 publications

Effects of exogenous fibrolytic enzymes, α-bromoethanesulfonate and monensin on fermentation in a rumen simulation (RUSITEC) system

Effects of exogenous fibrolytic enzymes, α-bromoethanesulfonate and monensin on fermentation in a rumen simulation (RUSITEC) system

Utility of Ionophores for Ruminant Animals: A Review

Monensina e digestibilidade aparente em ovinos alimentados com proporções de volumoso/concentrado

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