Milk production in Holstein cows supplemented with different levels of ruminally protected methionine

Lara, A.; Mendoza, G.D.; Landois, L.; Bárcena, R.; Sánchez-Torres, María Teresa; Rojo, R.; Ayala, José L.; Vega, Salvador

doi:10.1016/j.livsci.2006.04.032

Cited by 40 publications

(54 citation statements)

References 13 publications

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“…Lacking effect on milk fat percentage following RPM supplementation was reported earlier with dairy goats (Poljičak Milas & Marenjak 2007) and with dairy cows (Lara et al 2006, Třinácty et al 2006, Yang et al 2010, Soltan et al 2012. However, both (fat content and yield) were negatively affected by supplementation of RPM to early lactating dairy goats (Madsen et al 2005).…”

Section: Milk Yield and Compositionmentioning

confidence: 58%

“…Contrary to that, the inclusion of RPM in the diet of lactating ewes resulted in an increase of daily protein yield with no effect on milk protein content as a function of elevated milk yield (Goulas et al 2003). Those reported increased milk protein content attributed that to a major synthesis of casein and a reduction in urea nitrogen (Lara et al 2006).…”

Section: Milk Yield and Compositionmentioning

confidence: 83%

“…However, some results indicated that methionine was a limiting amino acid for high milk production in dairy cows fed corn and soybean meal during early lactation (Lara et al 2006, Ali et al 2009). Differences in response among experiments in milk yield might be attributed to the degree to which Met was limited in the diets fed, an excess of amino acids, an imbalance in amino acids, increased intake of compounds used to protect the amino acids from ruminal degradation, or other factors (Lara et al 2006).…”

Section: Milk Yield and Compositionmentioning

confidence: 99%

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Effect of rumen-protected methionine on production and composition of early lactating Shami goats milk and growth performance of their kids

Al‐Qaisi

Titi

2014

Arch. Anim. Breed.

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This study was conducted at the Agricultural Research Station of the University of Jordan in the Jordan valley to evaluate the effect of supplementing rumen-protected methionine to early lactating Shami goats on milk production, composition, fatty acid profile, and growth performance of their kids. Twenty-four fresh lactating Shami goats were randomly assigned into three dietary treatment groups (eight each) in a completely randomized design. Diets were a control with no supplements or supplemented with either 2.5, or 5.0 g/head/d rumenprotected methionine. The experiment started exactly after kidding and lasted for 60 days thereafter. Production variables studied were milk production, milk composition, body weights, feed intake, kids weaning weight, and milk fatty acids.Daily milk production and energy corrected milk were not affected by protected me thionine supplementation. Milk Percentages of fat, protein, total solids, and casein were also not affected by protected methionine supplementation. Likewise, fat and protein yields were not different among dietary treatments of protected methionine. No differences in milk fatty acids composition were observed by supplementing rumen protected methionine in the experiment.Feed intake, feed to milk ratio, and final body weight of dams were not changed among treatments. No differences were observed in weaning weights, average daily gain, and milk to gain ratio of kids born to dams in the experiment regardless to sex of kids.In conclusion, results indicated that supplementing rumen protected methionine to dairy goats diet did not improve their milking performance, the composition of their milk, or growth performance of their kids.

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Section: Milk Yield and Compositionmentioning

confidence: 58%

Section: Milk Yield and Compositionmentioning

confidence: 83%

Section: Milk Yield and Compositionmentioning

confidence: 99%

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Effect of rumen-protected methionine on production and composition of early lactating Shami goats milk and growth performance of their kids

Al‐Qaisi

Titi

2014

Arch. Anim. Breed.

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“…DMI and hence also consumption of nutrients were the lowest in the diet containing MetaSmart TM (18.96 kg; M) in contrast to the diet containing Smartamine TM M, for which DMI was the highest (20.48 kg; S; P < 0.001). Several previous studies have failed to show significant effects of Met supplementation on DMI (Lara et al, 2006;Phipps et al, 2008;Ordway et al, 2009). However, some studies reported decreased feed intake (Johnson et al, 1999), in contrast with the findings of Xu et al (1998), who observed an increase in DMI for cows supplemented with Lys and Met.…”

Section: Dry Matter Intake and Milk Productionmentioning

confidence: 96%

“…Reviewed literature noted various and inconsistent responses in milk yields and milk composition. The addition of Met in a diet appeared to be the most effective during early lactation (Socha et al, 2005;Lara et al, 2006). In the current experiment, which used cows shifting from the first to the second lactation periods, the highest average milk yields were recorded for cows supplemented with MetaSmart TM (31.34 kg), which produced approximately by 1.14 kg (P < 0.001) and 0.78 kg (P < 0.01) more milk than cows fed diets C and S, respectively.…”

Section: Dry Matter Intake and Milk Productionmentioning

confidence: 99%

Effects of a rumen-protected form of methionine and a methionine analogue on the lactation performance of dairy cows

Čermáková¹,

Kudrna²,

Illek³

et al. 2012

CZECH J ANIM SCI

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AbstrAct:The objective the present study was to determine the influence of a supplemental methionine analogue, the isopropyl ester of 2-hydroxy-4-(methylthio)-butanoic acid, commercially available as MetaSmart TM , on lactation performance, particularly milk protein production. The effects of this preparation were compared with those of a rumen-protected form of methionine, marketed as Smartamine TM M. Experiments were conducted according to a 3 × 3 Latin square design and included 30 high-yielding dairy cows (22 Holstein and 8 Czech Fleckvieh) randomly allocated to three balanced groups. Cows were fed a basal diet based on maize silage, lucerne silage, lucerne hay, fresh brewer's grains, and a concentrate mixture in the form of a total mixed ration ad libitum. The diet M was supplemented with MetaSmart TM (42.5 g/day) and diet S was supplemented with Smartamine TM M (19 g/day), while control diet C contained solvent-extracted soybean meal, which was added to achieve required levels of dietary protein. Each period lasted four weeks in total, including three preliminary weeks and one experimental week during which samples of milk and tail vein blood were taken. Supplementation of MetaSmart TM decreased dry matter intake of cows (18.96 kg) in contrast to the diet containing Smartamine TM M, for which dry matter intake was the highest (20.48 kg; P < 0.001). Despite decreased dry matter intake, the highest average milk yields were recorded for cows supplemented with MetaSmart TM (31.34 kg), which produced by approximately 1.14 kg (P < 0.001) and 0.78 kg (P < 0.01) more milk than cows fed diets C and S, respectively. As expressed by greater ratios milk/DMI, FCM/DMI, and ECM/DMI, the feed efficiency was improved in cows supplemented with MetaSmart TM . Both MetaSmart TM and Smartamine TM M dietary supplementation increased milk yield, milk protein concentrations, and yields and increased the prevalence of β-casein fraction in milk protein.

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Rumen-Protected Amino Acids for Ruminants

Kaur,

Mahesh

et al. 2024

Feed Additives and Supplements for Ruminants

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Milk production in Holstein cows supplemented with different levels of ruminally protected methionine

Cited by 40 publications

References 13 publications

Effect of rumen-protected methionine on production and composition of early lactating Shami goats milk and growth performance of their kids

Effect of rumen-protected methionine on production and composition of early lactating Shami goats milk and growth performance of their kids

Effects of a rumen-protected form of methionine and a methionine analogue on the lactation performance of dairy cows

Rumen-Protected Amino Acids for Ruminants

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