Effects of Rumen-Protected Choline and Monensin on Milk Production and Metabolism of Periparturient Dairy Cows

Zahra, L. C.; Duffield, T.F.; Leslie, K.E.; Overton, T.R.; Putnam, D.E.; LeBlanc, S.J.

doi:10.3168/jds.s0022-0302(06)72530-9

Cited by 81 publications

(121 citation statements)

References 31 publications

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“…The RUP level (39 g/kg of DM) in this experiment during the pre-partum period was similar to the low-RUP diet (40 g/kg of DM) in the experiment of Hartwell et al (2000) and significantly lower than the high-RUP diet (62 g/kg of DM). The similar DMI of the control and RPC-supplemented cows is in agreement with several earlier studies (Erdman and Sharma, 1991;Hartwell et al, 2000;Piepenbrink and Overton, 2003;Pinotti et al, 2003;Zahra et al, 2006). However, in our trial, the DMI of RPC-supplemented cows was numerically higher than for the group not receiving supplementary choline, but this difference did not show any statistical significance.…”

Section: Discussionsupporting

confidence: 92%

“…The increase in milk yield in our trial exceeded the improvement reported in any other earlier study, which may be explained by the higher average pre-partum body condition (BCS > 4.00) of the cows compared to other studies. This observation is supported by the report of Zahra et al (2006), who similarly found 4.4 kg/day increase in milk yield when RPC was supplemented to cows with BCS > 4.00.…”

Section: Discussionsupporting

confidence: 81%

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Effects of rumen-protected choline supplementation on milk production and choline supply of periparturient dairy cows

Elek¹,

Newbold²,

Gaál

et al. 2008

Animal

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The objective of the present study was to determine the effects of rumen-protected choline (RPC) supplementation on body condition, milk production and milk choline content during the periparturient period. Thirty-two Holstein cows were allocated into two groups (RPC group -with RPC supplementation, and control group -without RPC supplementation) 28 days before the expected calving. Cows were fed the experimental diet from 21 days before expected calving until 60 days of lactation. The daily diet of the RPC group contained 100 g of RPC from 21 days before calving until calving and 200 g RPC after calving for 60 days of lactation, which provided 25 g and 50 g per day choline, respectively. Body condition was scored on days 221, 7, 35 and 60 relative to calving. Milk production was measured at every milking; milk fat, protein and choline content were determined on days 7, 35 and 60 of lactation. Body condition was not affected by RPC supplementation. Milk yield was 4.4 kg higher for the group of cows receiving supplementary choline during the 60 days experimental period and 4% fat-corrected milk production was also increased by 2.5 kg/day. Milk fat content was not altered by treatment, but fat yield was increased by 0.10 kg/day as a consequence of higher milk yield in the RPC-treated group. Milk protein content tended to increase by RPC supplementation and a 0.18 kg/day significant improvement of protein yield was detected. Milk choline content increased in both groups after calving as the lactating period advanced. However, milk choline content and choline yield were significantly higher in the RPC group than in the control group. The improved milk choline and choline yield provide evidence that some of the applied RPC escaped ruminal degradation, was absorbed from the small intestine and improved the choline supply of the cows and contributed to the changes of production variables.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 81%

Effects of rumen-protected choline supplementation on milk production and choline supply of periparturient dairy cows

Elek¹,

Newbold²,

Gaál

et al. 2008

Animal

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“…Eifert et al (2005) did not find any effect for milk yield when comparing the experimental diets, although the diet with monensin resulted in a higher value for milk yield (3.0%), in comparison with the control diet (26.5 vs. 26.6 kg/day, respectively). Similarly, Ramanzin et al (1997); Zahra et al (2006) and Martineau et al (2007) did not observe effect of sodium monensin addition on milk yield of lactating cows.…”

Section: Resultsmentioning

confidence: 95%

Productive performance and milk protein fraction composition of dairy cows supplemented with sodium monensin

et al. 2010

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-The objective of this work was to evaluate the levels of sodium monensin on lactating cows and their effects on productive performance and milk protein fraction composition. It was used 12 Holstein cows, distributed in four balanced 3 × 3 Latin squares, and fed three diets: one control without monensin, and two diets with monensin at the levels of 24 or 48 mg/kg DM added to the concentrate. Milk production was daily measured throughout the entire experimental period. The samples used for analysis of milk composition were collected on two alternated days from the two daily milking. Non-protein nitrogen, total nitrogen and non-casein nitrogen contents were directly evaluated in the milk, and casein, whey protein and true protein contents were indirectly determined. The use of monensin in the rations reduced dry matter and nutrient intake, especially when diet with 48 mg/kg of dry matter was given. The ration with 24 mg/kg of DM increased milk production, with or without correction, and also fat and lactose yield, and it improved productive efficiency. The levels of monensin in the ratios did not influence contents of milk crude protein, non-protein nitrogen, non-casein nitrogen, true protein, casein, casein/ true protein ratio, whey protein, and of all those fractions expressed as percentage of crude protein. The utilization of monensin in the ratio at the dose of 24 mg/kg of DM influences positively the productive performance of lactating cows, and it does not influence the composition of milk protein fractions.Key Words: casein, dairy cows, ionophores, milk yield and composition, productive efficiencyDesempenho produtivo e composição da fração protéica do leite em vacas sob suplementação com monensina sódica RESUMO -Objetivou-se avaliar níveis de monensina sódica para vacas em lactação e seus efeitos no desempenho produtivo e na composição da fração protéica do leite. Foram utilizadas 12 vacas da raça Holandesa, distribuídas em quatro quadrados latinos 3 × 3 balanceados e alimentadas com três rações: uma controle sem monensina, e duas com monensima nos níveis de 24 mg/kg de matéria seca ou 48 mg/kg MS adicionada ao concentrado. A produção de leite foi mensurada diariamente durante todo o período experimental. As amostras utilizadas para análise da composição do leite foram coletadas em dois dias alternados e provenientes das duas ordenhas diárias. Foram analisados no leite os teores de nitrogênio não-protéico, nitrogênio total e nitrogênio não-caseinoso e indiretamente os teores de caseína, proteína do soro e proteína verdadeira. A utilização de monensina nas rações ocasionou redução do consumo de MS e de nutrientes, especialmente quando fornecida a ração com 48 mg/kg de MS. A ração com 24 mg/kg de MS promoveu aumento da produção de leite, sem e com correção, e da produção de gordura e lactose e aumento da eficiência produtiva. Os níveis de monensina nas rações não influenciaram os teores de proteína bruta, nitrogênio não-protéico, nitrogênio não-caseinoso, proteína verdadeira, caseína, relação caseína...

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“…Resultados semelhantes foram descritos por Davidson et al (2008) e por Zom et al (2011). No entanto, Zahra et al (2006) detectaram um aumento médio de 1,2kg nos primeiros 60 dias pós-parto, quando os animais foram suplementados com colina, e Pinotti et al (2003) descreveram um aumento médio de 2,9kg no primeiro mês de lactação em vacas tratadas com colina. Tanto no estudo de Pinotti et al (2003) quanto no estudo de Zahra et al (2006) Lima et al (2012).…”

Section: Resultsunclassified

Efeito da suplementação com colina protegida sobre parâmetros bioquímicos, produção e reprodução de vacas leiteiras no periparto

Aires

Rocha

Torbitz

et al. 2016

Arq. Bras. Med. Vet. Zootec.

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RESUMOAvaliou-se o efeito da suplementação com colina protegida sobre o perfil energético, as enzimas hepáticas e a reprodução de vacas leiteiras no periparto. Quinze vacas leiteiras foram divididas em dois grupos experimentais: oito receberam 80 gramas de colina protegida por 21 dias no pré-parto e por 40 dias no pós-parto e sete foram consideradas controle. Amostras de sangue foram coletadas nos dias 10, 20, 30 e 60 pós-parto para avaliação dos perfis energético e hepático. Aos 60 dias pós-parto, realizou-se exame ginecológico dos animais para avaliação da saúde reprodutiva. A suplementação com colina protegida não alterou os níveis de beta-hidroxibutirato (BHBA), ácidos graxos não esterificados (AGNE), frutosamina, fator de crescimento semelhante a glicose I (IGF-I), status oxidante total (TOS), aspartato aminotransferase (AST) e gamaglutamiltransferase (GGT) no pós-parto. Não houve diferença também quanto à produção de leite. Aos 60 dias pós-parto, vacas suplementadas com colina protegida apresentaram menor número de casos de endometrite que vacas do grupo controle. A suplementação de colina protegida não alterou o perfil bioquímico e a produção de leite, mas reduziu o número de casos de endometrite no pós-parto de vacas leiteiras.Palavras-chave: período de transição, vacas leiteiras, parâmetros bioquímicos, colina protegida ABSTRACTThe study aimed to evaluate the effect of supplementation with protected choline on the energy profile, liver enzymes and reproduction in dairy cows in peripartum. Fifteen cows were divided into two groups: 8 received 80 grams of protected choline for 21 days pre-partum and 40 days postpartum, and 7 were considered control. Blood samples were collected on days 10, 20, 30, and 60

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Effects of Rumen-Protected Choline and Monensin on Milk Production and Metabolism of Periparturient Dairy Cows

Cited by 81 publications

References 31 publications

Effects of rumen-protected choline supplementation on milk production and choline supply of periparturient dairy cows

Effects of rumen-protected choline supplementation on milk production and choline supply of periparturient dairy cows

Productive performance and milk protein fraction composition of dairy cows supplemented with sodium monensin

Efeito da suplementação com colina protegida sobre parâmetros bioquímicos, produção e reprodução de vacas leiteiras no periparto

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