Response of Lactating Cows to Methionine or Methionine Plus Lysine Added to High Protein Diets Based on Alfalfa and Heated Soybeans

Armentano, L.E.; Bertics, S.J.; Ducharme, G.A.

doi:10.3168/jds.s0022-0302(97)76047-8

Cited by 80 publications

(70 citation statements)

References 20 publications

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“…IV). This contradicts findings of an elevated milk yield with supplementary methionine [29], whereas in other studies also no performance effect occurred [2,21]. Rulquin and Vérité [32], however, mentioned in a review the high variability in the lactational response of dairy cows to additional rumen-protected methionine.…”

Section: Statistical Analysesmentioning

confidence: 83%

Effects of supplying leucine and methionine to early-lactating cows fed silage-concentrate based diets with a calculated deficiency in leucine and methionine

Kröber¹,

Sutter²,

Senn³

et al. 2001

Anim. Res.

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-In a 2 × 2 factorial approach the productive and metabolic response of 24 multiparous Brown Swiss cows fed rations calculated to be deficient in leucine (0.9-fold of requirements) and methionine (0.8-fold) to supplementation either of one or both of these amino acids were investigated. On a dry matter basis the rations consisted of 29% grass silage, 20% maize silage, 6% hay, and 45% concentrate. Blood plasma amino acid data confirmed the intended difference in metabolic supply of leucine and methionine keeping a low variation in the plasma levels of the other essential amino acids, particularly lysine. Live weight, milk yield as well as content and amount of milk fat were not affected by the treatments. Content and amount of milk protein were significantly reduced relative to initial level without additional methionine. Nutrient digestibility and nitrogen balance remained widely unchanged by the supplementations. Except of plasma aspartate amino transferase, cholesterol, creatinine and ornithine, which responded to methionine, hormones, enzyme activities as well as plasma, urine and milk metabolites were not systematically influenced by leucine and methionine supply. The present results gave clearer indications for a deficiency in methionine than in leucine.

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Section: Statistical Analysesmentioning

confidence: 83%

Effects of supplying leucine and methionine to early-lactating cows fed silage-concentrate based diets with a calculated deficiency in leucine and methionine

Kröber¹,

Sutter²,

Senn³

et al. 2001

Anim. Res.

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“…The first limiting amino acid on corn, soybean meal, corn silage and alfalfa-based diets is usually methionine (Schwab et al, 1992;Rulquin et al, 1993). Armentano et al (1997) supplemented the diet of lactating cows with 10.5 g/day rumen-protected methionine and found a 1 g/kg increase in milk protein concentration and a 42 g increase in protein yield, although no milk yield response was reported. In our trial, methionine was the first limiting amino acid.…”

Section: Discussionmentioning

confidence: 99%

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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“…Milk protein content increased when ruminally protected Lys plus Met were added to dairy cow diets (57 days in milk) based on maize-distillers grains (Nichols et al, 1998). Others reported that Met, unlike Lys, limits milk and milk protein production when added to dairy cows diets (Armentano et al, 1997;Robinson et al, 1998). Those responses were achieved when rations contained 500 g/kg (on a DM basis) roughage and a concentrate mixture based on soyabean proteins, or were composed to be deficient in metabolic allowances of one or both of these EAA.…”

Section: Discussionmentioning

confidence: 99%

Responses of cows to abomasal infusion of lysine and methionine at two levels of dietary protein

Mabjeesh¹,

Smoler²,

Abramson³

et al. 2002

J. Anim. Feed Sci.

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The response in dairy cows fed high-concentrate diets to abomasal infusion of lysine (Lys) and methionine (Met) at two levels of dietary CP was examined. Four multiparous Israeli Holstein cows (day in milk=l 80±30, means ± SE) were utilized in a 4x4 Latin square design experiment that included a 2x2 factorial arrangement with 18-d periods. Cows were surgically prepared with abomasal cannulae and catheters implanted in the costoabdominal artery. Two diets were composed to contain high and low crude protein (CP) content (152 vs 132 g/kg dry matter). Abomasal infusion of either water or Lys (38 g/d) plus Met (14 g/d) was performed with each diet. On the last day of the experimental period the metabolism of amino acids (AA) across the mammary gland was monitored. Dry matter intakes and milk and protein yields were not affected by either dietary CP level or postruminal infusion of Lys plus Met and averaged 15.9, 21.4, and 0.694 kg/d, respectively. Milk fat content and yield were not affected by dietary CP concentration, but did increase with abomasal infusion of Lys plus Met (33.3 vs 37.2 g/kg; PO.04, and 0.703 vs 0.762 kg/d; PO.05, respectively). Arterial plasma concentration of Lys and Met increased by 2.4-and 3.5-fold, respectively, when these AA were infused abomasally.

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Response of Lactating Cows to Methionine or Methionine Plus Lysine Added to High Protein Diets Based on Alfalfa and Heated Soybeans

Cited by 80 publications

References 20 publications

Effects of supplying leucine and methionine to early-lactating cows fed silage-concentrate based diets with a calculated deficiency in leucine and methionine

Effects of supplying leucine and methionine to early-lactating cows fed silage-concentrate based diets with a calculated deficiency in leucine and methionine

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

Responses of cows to abomasal infusion of lysine and methionine at two levels of dietary protein

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