Methionine Hydroxy Analog in Supplements for Lactating Beef Cows

Clanton, D. C.; England, Marijane E.

doi:10.2527/jas1980.513539x

Cited by 4 publications

(10 citation statements)

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“…4 Sum of L-methionine and HMTBa. (1978), and Clanton and England (1980) reported all beef cows numerically gained weight by the conclusion of the research trial which differed from the present trial as cows continued to lose weight until weaning in our experiment. Differences in the time of year or season may have had an effect on the differences in BW gains.…”

Section: Cow Performancecontrasting

confidence: 66%

“…There were also no differences (P ≥ 0.36) observed in cow BW or BCS at weaning. No significant differences, due to supplementation of MHA, in beef cow BW and BCS were observed in other experiments over the duration of supplementation (Clanton and England, 1980;Varner, 1974;Wright et al, 1975;Thomas and Langford, 1978). In contrast, Krehbiel et al (2001) did note there were beef cow BW change differences between the supplementation period and the grazing period among treatments; however, at the end of the experiment, there were no differences in overall cow BW change.…”

Section: Cow Performancementioning

confidence: 84%

“…Differences in cow BW gains may have been partially attributed to seasonal conditions. No significant differences in weight changes across previous experiments (Varner, 1974;Clanton and England, 1980) would potentially indicate that the supplemental methionine was generally not utilized for cow BW gain. Previous research with similar cow performance results would suggest that the AA, such as methionine, were being partitioned for milk synthesis in dairy cows (Chen et al, 2011).…”

Section: Cow Performancementioning

confidence: 95%

“…Cows from previous studies (Varner, 1974;Thomas and Langford, 1978;Clanton and England, 1980;Krehbiel et al 2001) were spring calving beef cows, and spring forage quality tends to increase as the season progresses.…”

Section: Cow Performancementioning

confidence: 96%

“…Protected methionine forms with physical coatings of lipid and pH sensitive polymers or analog forms bonded to hydroxyl or isopropanol groups have been effective in reducing the need for increased CP in the diet while improving N utilization in dairy cows (Chen et al, 2011). In spring-calving beef cows, Clanton and England (1980) reported increased conception rates in cows supplemented methionine hydroxy analog (MHA). Varner (1974) observed increased milk production in lactating beef cows fed MHA on range.…”

Section: Effects Of Supplementing Methionine Hydroxy Analog On Beef Cowmentioning

confidence: 99%

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Effects of supplementing methionine hydroxy analog on beef cow performance, milk production, reproduction, and preweaning calf performance1

Clements

Ireland

Freitas³

et al. 2017

Journal of Animal Science

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Mature Simmental × Angus cows (214 cows; 635 ± 7 kg) were utilized to determine the effects of late gestation and early postpartum supplementation of methionine hydroxy analog (MHA) on cow BW, BCS, milk production, milk composition, reproduction, and calf performance until weaning in a fall-calving, cool-season grazing system. Cows were stratified by BW, age, AI sire, and assigned to 1 of 12 pastures (17 or 18 cows·pasture). Pastures were randomly allotted to 1 of 2 treatments: control (0.45 kg·cow·d of wheat midd-based pellets, = 6) or supplement including MHA (0.45 kg·cow·d of wheat midd-based pellets including 10 g MHA supplied as MFP (Novus International, Inc., St. Charles, MO; = 6). Treatments were fed 23 ± 7 d prepartum through 73 ± 7 d postpartum. Cow BW was collected at postcalving (27 ± 7 d postpartum), end of supplementation (73 ± 7 d postpartum), AI, pregnancy check, and end of trial (192 and 193 ± 7 d postpartum). At 73 ± 7 d postpartum, a subset of cow-calf pairs was used in a weigh-suckle-weigh procedure to determine milk production, and milk samples were taken to determine milk composition ( = 45·treatment). Serum from blood was collected at 73 ± 7 and 83 ± 7 d postpartum to determine cow cyclicity and concentrations of 2-hydroxy4-(methylthio) butanoic acid (HMTBa) and L-Methionine. After supplementation, all cow-calf pairs were managed as a common group until weaning (193 ± 7 d of age). Cows were bred via AI at 97 ± 7 d postpartum and clean-up bulls were turned out 11 d post-AI for a 55-d breeding season. Cows fed MHA had greater ( < 0.01) serum concentrations of HMTBa. Cow BW and BCS were not different ( ≥ 0.10) at any time points between treatments. There was no treatment effect ( ≥ 0.17) on calf birth BW, calf weaning BW (193 ± 7 d of age), or calf ADG. Calculated 24-h milk production, milk composition and component production did not differ ( ≥ 0.21). There were no differences ( ≥ 0.50) in percentage of cows cycling, AI conception rate, and overall pregnancy rate between treatments. Post-trial nutritional modeling suggests cows experienced several nutritional deficiencies beyond methionine (Met) that limited the response to Met supplementation. Although supplementation of MHA during late gestation through estimated peak lactation increased serum HMTBa concentrations, it did not affect cow performance, cow milk production, or calf performance when fall-calving cows grazed cool-season forages.

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Section: Cow Performancecontrasting

confidence: 66%

Section: Cow Performancementioning

confidence: 84%

Section: Cow Performancementioning

confidence: 95%

Section: Cow Performancementioning

confidence: 96%

Section: Effects Of Supplementing Methionine Hydroxy Analog On Beef Cowmentioning

confidence: 99%

See 3 more Smart Citations

Effects of supplementing methionine hydroxy analog on beef cow performance, milk production, reproduction, and preweaning calf performance1

Clements

Ireland

Freitas³

et al. 2017

Journal of Animal Science

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Bibliography

1986

Nitrogen and Energy Nutrition of Ruminants

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Studies of the Effect of Supplementing Protected Methionine (HMM-Ca) to Dairy Cows on Milk Yield and Fertility

Spiekers

Pfeffer

1990

Archiv für Tierernaehrung

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A trial with 90 cows was conducted to examine the effect of supplementing 30 g N-hydroxymethyl-DL-methionine-calcium (HMM-Ca) from 14 days pre calving till 100 days in lactation on the performance and some physiological traits. Cows were kept on four energy levels by feeding different amounts of concentrate. At each energy level, half of the cows were given a methionine supplement. Forage consisted of 1/3 corn- and/or beet pulp silage and 2/3 grass silage ad libitum. The amount of daily milk yield differed not significantly from 31.5 kg for the supplement group to 30.6 kg for the control group. No interaction between the methionine supplementation and energy level could be detected. Mean methionine content in blood plasma differed from 22.7 mmol/l for the supplement group to 16.8 mmol/l for the control group. GOT, tau-GT, bilirubin and urea in blood serum and milk urea content did not indicate a positive effect of the methionine supplementation on the metabolism. Conception rate differed slightly from 87% in the supplement group to 73% in the control group.

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Methionine Hydroxy Analog in Supplements for Lactating Beef Cows

Cited by 4 publications

References 0 publications

Effects of supplementing methionine hydroxy analog on beef cow performance, milk production, reproduction, and preweaning calf performance1

Effects of supplementing methionine hydroxy analog on beef cow performance, milk production, reproduction, and preweaning calf performance1

Bibliography

Studies of the Effect of Supplementing Protected Methionine (HMM-Ca) to Dairy Cows on Milk Yield and Fertility

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