Influence d'UN Apport De Dl-Méthionine a Des Vaches Au Début De La Lactation Sur La Production Laitière Et La Composition Du Sang

Rémond, Bernard; Champredon, C.; Decaen, C.; Pion, R.; Journet, M.; Lefaivre, Renée; Lefaivre, J.; Marquis, B.

doi:10.1051/rnd:19710309

Cited by 17 publications

(4 citation statements)

References 8 publications

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“…It is necessary for the synthesis of serum lipoproteins, it is a methyl donor for phospholipids and it has a special function in the bonding of the lipid and the protein portions of the lipoproteins (McCarthy et al, 1968). In addition, it is assumed that methionine promotes the synthesis of fat in the udder (Rémond et al, 1971), and that the protein level in the ration affects the transfer of blood lipids from carrier proteins to the udder (Oldham et al, 1979b).…”

Section: Introductionmentioning

confidence: 99%

The influence of slowly and rapidly degradable concentrate protein on a number of rumen parameters in dairy cattle.

Veen¹

1986

NJAS

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In 5 trials with Dutch Black Pied or Dutch Black Pied X Holstein-Friesian cows the effects of feeding concentrates with rapidly and slowly degradable protein on rumen values were investigated. Samples of rumen fluid were taken before and 45, 90, 135 and 180 min after the morning concentrate feed. Rumen pH was not affected by protein degradability. Rumen ammonia content was higher when easily degradable protein was given than when slowly degradable protein was given; peak concentration varied from 10 to 12.5 and from 4 to 8 mmol/litre, respectively. Maximum concentration of lactate was not influenced by protein degradability. Rumen content of volatile fatty acids increased more rapidly when the slowly degradable protein rather than when the rapidly degradable protein was given. At all sampling times the molar acetate:propionate ratio was higher after feeding on slowly degradable protein than after rapidly degradable protein. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Section: Introductionmentioning

confidence: 99%

The influence of slowly and rapidly degradable concentrate protein on a number of rumen parameters in dairy cattle.

Veen¹

1986

NJAS

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“…The concentration of amino acids is given in Table 6. The classification of the amino acids is the same as that used by Rémond et al (1971), who considered only aspartic acid, glutamic acid, serine, proline, alanine and glycerine as non-essential amino acids, and the remaining acids as essential or semi-essential. Where a significant lin ear time course was observed, this involved a decrease in the concentration.…”

Section: Bloodmentioning

confidence: 99%

“…Concentrations of methionine and phenylalanine were low on both treatments. Methionine is often mentioned as the first-limiting amino acid for milk protein pro duction (Bergen, 1979;Rémond et al, 1971). When under the influence of slowly fermentable protein the supply of a limiting amino acid increases, this could lead to increased milk protein synthesis and a consequent decrease in the concentration of the other essential amino acids in the blood.…”

Section: Blood Parametersmentioning

confidence: 99%

The influence of slowly and rapidly degradable concentrate protein on nitrogen balance, rumen fermentation pattern and blood parameters in dairy cattle.

Veen¹,

Veling²,

Bakker³

1988

NJAS

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In a crossover trial, 4 cows were given concentrates containing rapidly and slowly degradable protein in combination with prewilted grass silage. Diets were given in 2 equal daily portions according to DCP and net energy requirements. The trial consisted of 3 main periods of 3 weeks each, with faeces, urine and milk collected and measured during the final week. On 1 day during this week samples of rumen fluid were taken and on 2 days blood samples were taken, directly before the morning feed and 1, 2, 3, 4 and 8 h later. N digestibity and N retention were the same on both rations. A concentrate with slowly-degradable protein resulted in a significantly higher rumen pH and acetate:propionate ratio. Ammonia concn. tended to be lower. Slowly-degradable concentrate protein led to a significantly higher concn. of urea and a lower concn. of insulin in blood. The concn. of several of the essential amino acids, and of the glucogenic amino acids and glycine was significantly lower. There were no significant effects of type of protein on milk yield or milk composition, but there was a tendency for these parameters to increase with ration containing slowly-degradable protein. Results suggest the ration containing slowly-degradable concentrate protein produced a more even rumen fermentation, which promoted a higher acetate:propionate ration in the rumen. On this ration there was a tendency for more gluconeogenesis from amino acids to occur. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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“…Methionine is considered as an important amino acid in ruminant nutrition and has been suggested to be the most limiting amino acid for milk protein synthesis (Hat field & Richardson, 1978;Spires et al, 1975;Schwab et al, 1976). A positive effect of the supplementation of methionine or methionine hydroxy analog (MHA) to the feed on milk, milk fat and milk protein yield and on fat and protein content in milk has been reported by Bhargava et al (1977), Chandler et al (1976), Griel et al (1968), Holter et al (1972), Kaufmann & Lupping (1979), Patton et ah (1970), Polan et al (1970), Remond et al (1971), Rosser et al (1971), Van Hellemond Sprietsma (1977), Van Horn et al (1975).…”

Section: Introductionmentioning

confidence: 99%

Effect of methionine compounds on rumen activity of cows.

Huisman¹,

Weerden²,

Leeuwen³

et al. 1988

NJAS

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Rate of degradation of hay was studied, using the nylon-bag technique, in 2 cows given a basal diet without (controls) or with a liquid methionine supplement (LiquimethReg.) or a protected methionine supplement (MepronReg.) providing methionine 25 g daily. After 24 and 48 h incubation methionine supplementation significantly increased degradation of DM, organic matter and cell wall constituents compared with controls. Degradability of crude protein (CP) was significantly increased by methionine supplementation, and degradability was affected by type of supplement with degradability of CP greater with the liquid methionine supplement than with the protected methionine supplement. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Influence d'UN Apport De Dl-Méthionine a Des Vaches Au Début De La Lactation Sur La Production Laitière Et La Composition Du Sang

Cited by 17 publications

References 8 publications

The influence of slowly and rapidly degradable concentrate protein on a number of rumen parameters in dairy cattle.

The influence of slowly and rapidly degradable concentrate protein on a number of rumen parameters in dairy cattle.

The influence of slowly and rapidly degradable concentrate protein on nitrogen balance, rumen fermentation pattern and blood parameters in dairy cattle.

Effect of methionine compounds on rumen activity of cows.

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