Effect of Intraruminal Monensin Capsules on Reproductive Performance and Milk Production of Dairy Cows Fed Pasture

Hayes, D.P.; Pfeiffer, Dirk U.; Williamson, N. B.

doi:10.3168/jds.s0022-0302(96)76451-2

Cited by 63 publications

(59 citation statements)

References 10 publications

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“…However, other studies have not shown milk fat depression following monensin administration (e.g., Lean et al, 1994;Duffield et al, 1999). The milk protein content of monensintreated cows was lower than for control cows, in agreement with Hayes et al (1996), Green et al (1999), and Phipps et al (2000), although other studies (e.g., Ramanzin et al, 1997;Benchaar et al, 2006) have not shown a protein response with monensin.…”

Section: Resultsmentioning

confidence: 53%

Long-Term Effects of Feeding Monensin on Methane Production in Lactating Dairy Cows

Odongo

Bagg

Vessie

et al. 2007

Journal of Dairy Science

150

137

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The objective of this study was to determine the longterm effects of feeding monensin on methane (CH 4 ) production in lactating dairy cows. Twenty-four lactating Holstein dairy cows (1.46 ± 0.17 parity; 620 ± 5.9 kg of live weight; 92.5 ± 2.62 d in milk) housed in a tie-stall facility were used in the study. The study was conducted as paired comparisons in a completely randomized design with repeated measurements in a color-coded, double-blind experiment. The cows were paired by parity and days in milk and allocated to 1 of 2 treatments: 1) the regular milking cow total mixed ration (TMR) with a forage-to-concentrate ratio of 60:40 (control TMR; placebo premix) vs. a medicated TMR (monensin TMR; regular TMR + 24 mg of Rumensin Premix/kg of dry matter) fed ad libitum. The animals were fed and milked twice daily (feeding at 0830 and 1300 h; milking at 0500 and 1500 h) and CH 4 production was measured prior to introducing the treatments and monthly thereafter for 6 mo using an open-circuit indirect calorimetry system. Monensin reduced CH 4 production by 7% (expressed as grams per day) and by 9% (expressed as grams per kilogram of body weight), which were sustained for 6 mo (mean, 458.7 vs. 428.7 ± 7.75 g/d and 0.738 vs. 0.675 ± 0.0141, control vs. monensin, respectively). Monensin reduced milk fat percentage by 9% (3.90 vs. 3.53 ± 0.098%, control vs. monensin, respectively) and reduced milk protein by 4% (3.37 vs. 3.23 ± 0.031%, control vs. monensin, respectively). Monensin did not affect the dry matter intake or milk yield of the cows. These results suggest that medicating a 60:40 forage-to-concentrate TMR with 24 mg of Rumensin Premix/kg of dry matter is a viable strategy for reducing CH 4 production in lactating Holstein dairy cows.

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Section: Resultsmentioning

confidence: 53%

Long-Term Effects of Feeding Monensin on Methane Production in Lactating Dairy Cows

Odongo

Bagg

Vessie

et al. 2007

Journal of Dairy Science

150

137

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“…Na literatura, encontram-se trabalhos nos quais se obteve aumento da produção de leite em vacas sob suplementação com esse ionóforo (Hayes et al, 1996;Lean et al, 1996;Fellner, 1997;Beckett et al,1998;Sauer et al, 1998;Van Der Werf et al, 1998), enquanto em outros trabalhos (Baile et al, 1982;Dye et al, 1988;Sauer et al, 1989;Ramanzin et al, 1997;Phipps 1997;Green et al, 1999;Juchem et al, 2004), incluindo este, não houve aumento na produção de leite. Existem inúmeros fatores relacionados a esta diferença da ação da monensina na produção de leite, como raça, quantidade de concentrado oferecido e quantidade e duração da administração do ionóforo (Kennelly & Lien, 1997 Duffield et al (1999), a condição corporal dos animais também pode afetar essa resposta.…”

Section: Resultsunclassified

“…A monensina altera as proporções de ácidos graxos voláteis (AGV) no rúmen, principal fonte de energia dos ruminantes, aumentando a proporção de ácido propiônico e diminuindo a proporção de ácido acético e butírico e a relação acetato/propionato sem alterar a produção total de ácidos graxos voláteis, (Dinius et al, 1976;Jiménez et al,1984;Van Beuklen et al, 1984;Fellner et al,1997), a produção de metano (Kennelly & Lien, 1997) e a degradação ruminal da proteína dietética (Hayes et al, 1996).…”

Section: Introductionunclassified

Efeitos da administração de monensina por meio de cápsulas de liberação controlada no desempenho de vacas Holandesas no início da lactação

Conti

Salles

Schalch³

2008

R. Bras. Zootec.

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RESUMO -Com o objetivo de estudar o efeito da monensina sobre a produção e composição de leite, a contagem de células somáticas, a condição corporal e os parâmetros sangüíneos e reprodutivos de vacas da raça Holandesa de alta produção no início de lactação, foram utilizadas 44 vacas com produção diária de 33,44 ± 4,93 litros de leite, em delineamento inteiramente casualizado, com dois tratamentos: um controle (C) e outro com cápsulas de liberação controlada de monensina com eficácia de 100 dias (300 mg/vaca/dia). A administração individual de monensina foi realizada 30 dias antes da data provável do parto. A monensina não alterou a produção, a composição do leite e a contagem de células somáticas do leite nem a condição corporal e a concentração de glicose e BHBA (beta-hidroxibutirato) no soro das vacas, no entanto, diminuiu a concentração de AGNE (ácidos graxos não-esterificados) no soro das vacas com 60 dias de lactação. O período de serviço e o número de serviços por concepção não diferiram entre os tratamentos, porém, a administração de monensina diminuiu o número de animais que apresentaram retenção de placenta e laminite. A administração de monensina para vacas Holandesas de alta produção no início de lactação não modifica a produção e a composição do leite, contudo, diminui a concentração de AGNE 60 dias após o parto e a incidência de laminite e retenção de placenta nas vacas no pós-parto.Palavras-chave: ácidos graxos não-esterificados, composição e produção do leite, glicose, ionóforo, parâmetros reprodutivos Effects of administration controlled released monensin capsules on performance of Holstein cows in the beginning of lactation ABSTRACT -The objective was to study the effect of the monensin on milk yield and milk composition, somatic cell count, body condition score, serum parameters and reproductive aspects high producing Holstein cows in early lactation. Fourty-four cows with daily milk yield of the 33.44 ± 4.93 liter of milk were assigned to a completely randomized design with two treatments: control (C) and other with controlled released monesin capsule with eficacy of 100 days (300 mg/cow/ day). The individual administration of the monensin capsule was made 30 day before the probable calving time. Monensin did not affect the milk yield and milk composition, somatic cell count, body condition score and glucose and BHBA (betahidroxibutirate) concentration in the cow blood serum. However, decreased concentration of NEFA (Non esterified fatty acid) in blood serum of cow with 60 days in milk. Service period and number of services per conception was not affected by treatments, however, the administration monensin decreased the number of the cows that showed retained placenta and laminitis. The administration monensin for high producing Holstein cows in early lactation did not change the milk production and composition. However, decrease the concentration of NEFA 60 days post calving and the incidence of laminitis and retained placenta in the post calving cows.Key Words: NEFA, glucose, ionosphor, milk...

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“…Based on data with dairy cattle, monensin has the potential to increase milk production by 0.41 to 0.75 L d -1 (Hayes et al 1996;Beckett et al 1998). Monensin also can have an effect on milk composition.…”

Section: Mots Clésmentioning

confidence: 99%

Management strategies to improve cow-calf productivity on meadow bromegrass pastures

Kopp¹,

Wittenberg²,

McCaughey³

2004

Can. J. Anim. Sci.

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. 2004. Management strategies to improve cow-calf productivity on meadow bromegrass pastures. Can. J. Anim. Sci. 84: 529-535. A 4-yr experiment was conducted to determine the effects of fertilization, incorporation of a legume and use of the Rumensin ® -controlled release capsules (CRC) on productivity of cow-calf pairs grazing meadow bromegrass (Bromus biebersteinii Roem & Schult.). Four pasture treatments (T), alfalfa-grass fertilized (AF), alfalfa-grass unfertilized (AU), grass-only fertilized (GF) and grass-only unfertilized (GU), each replicated twice were compared. The eight 3.7-ha pastures were split into five equally sized paddocks and rotationally stocked with first-calf cows in 1995 and 1998, and with mature cows in 1996 and 1997. Half of the cows on each pasture received a Rumensin ® CRC 1 wk prior to the start of the pasture season. Cow DMI was not influenced by fertilization or incorporation of a legume. However, cows treated with monensin consumed less (2.3% BW) compared to the control cows (2.5% BW, P < 0.05). Incorporation of alfalfa and fertilization improved pasture quality and resulted in higher CP and lower NDF content in forage selected by the animals. Monensin improved (P < 0.05) cow average daily gain (ADG, kg d -1 ) when grazing unfertilized grass and alfalfa-grass pastures, but did not influence gains of cows on fertilized pastures. Fertilizer application, legume incorporation and monensin administration did not affect milk yield or milk composition. Despite differences in diet quality, calf ADG for AU, AF, and GF were similar. However, calf ADG was lower for GU pastures (P < 0.05), probably as a result of the high fibre and low protein content of this pasture treatment. Both incorporation of alfalfa and fertilization increased total calf gain (kg ha -1 ); the greatest improvement was associated with fertilization. There were, however, economic advantages to legume incorporation, as the cost of the additional gain for GF and AF pastures averaged $1.08 and $0.79 kg -1 ha -1 , and no extra costs were incurred for AU. ). Pour cela, ils ont comparé quatre traitements étudiés en double : la graminée et de la luzerne avec fertilisation (AF), la graminée et de la luzerne sans fertilisation (AU), la graminée avec fertilisation (GF) et la graminée sans fertilisation (GU). Les huit pâturages de 3,7 hectares ont été scindés en cinq enclos de superficie identique et on y a mis à l'herbe, en rotation, des vaches primipares (1995 et 1998) ou des vaches matures (1996 et 1997). La moitié des sujets de chaque enclos a reçu des capsules de Rumensin ® à libéra-tion lente une semaine avant que débute la paissance. La fertilisation et l'incorporation d'une légumineuse n'affectent pas l'ingestion de matière sèche par la vache. Toutefois, les animaux recevant du monensin mangent moins (2,3 % du poids corporel) que les vaches témoins (2,5 % du poids corporel, P < 0,05). L'incorporation de luzerne et la fertilisation améliorent la qualité du pâturage tout en augmentant la concentration de protéines brutes et en ...

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Effect of Intraruminal Monensin Capsules on Reproductive Performance and Milk Production of Dairy Cows Fed Pasture

Cited by 63 publications

References 10 publications

Long-Term Effects of Feeding Monensin on Methane Production in Lactating Dairy Cows

Long-Term Effects of Feeding Monensin on Methane Production in Lactating Dairy Cows

Efeitos da administração de monensina por meio de cápsulas de liberação controlada no desempenho de vacas Holandesas no início da lactação

Management strategies to improve cow-calf productivity on meadow bromegrass pastures

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