Body Weight Gain and Wool Growth Response to Formaldehyde Treated Casein and Sulfur Amino Acids

Pl, Wright

doi:10.2527/jas1971.331137x

Cited by 17 publications

(2 citation statements)

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“…Sulphur‐containing amino acids are often limiting for fibre growth in ruminant animals because the amino acids in the dietary protein can be degraded by rumen microbes resulting in a limited supply of sulphur‐containing amino acids to the small intestine being available for absorption due as much to low‐sulphur amino acid content of pasture compared with fibre (Bach et al., 2005). When the supply of sulphur‐containing amino acids is limited, ruminants may direct the available sulphur‐containing amino acids more to lactation, reproduction, growth or maintenance and not to fibre growth (Wright, 1971).…”

Section: Introductionmentioning

confidence: 99%

Rumen‐protected methionine supplementation and fibre production in alpacas (Vicugna pacos)

Moore

Maloney

Vaughan³

et al. 2012

Animal Physiology Nutrition

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Sulphur-containing amino acids are a crucial requirement for fibre production and may be supplemented in the diet of fibre-producing animals to stimulate fibre growth. The alpaca fibre industry is a developing industry in Australia with high variability in fibre production. To date, there is no evidence whether supplementing the diet of alpacas with sulphur amino acids improves fibre production. We hypothesised that supplementation with the rumen-protected sulphur amino acid, methionine would increase fibre growth in alpacas. Three groups of eight huacaya alpaca wethers were fed daily a maintenance diet supplemented with 0, 2 or 4 g of rumen-protected methionine for 7 weeks. Fibre samples were taken at the beginning and end of the study with a blood sample taken by jugular venipuncture prior to feeding on the first day of each week. Methionine supplementation had no effect on fibre diameter (p = 0.92), fibre length (p = 0.91) or fibre yield (p = 0.33). The change of season over the study affected plasma glucose (p < 0.001), plasma urea nitrogen (p < 0.001) and fibre diameter (p < 0.001). The indifference between groups may be due to the maintenance diet supplying sufficient levels of methionine, the lack of genetic potential of the experimental animals to respond to additional methionine or that the supplemental methionine was not protected in alpacas and deaminated for glucose production.

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Section: Introductionmentioning

confidence: 99%

Rumen‐protected methionine supplementation and fibre production in alpacas (Vicugna pacos)

Moore

Maloney

Vaughan³

et al. 2012

Animal Physiology Nutrition

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show abstract

“…54: 393401 (SepL 1974) of ammonia may be absorbed through the rumen wall (McDonald 1948;Chalmers et al 1954;Lewis et at. 1957 Heat treatment (Chalmers et al 1954;Tagri et al 1962), tannin treatment (Tagri et al 1965;Delorllaval and Zelter 1968) and formaldehyde treatment (Ferguson et al 1967; Reis and Tunks 1969;Hatfleld 1970;Wright 1971) (Fig. 3) Fig.…”

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confidence: 99%

Effects of Volatile Fatty Acid Treatment on the Protection of Protein in the Rumen

Atwal¹,

Milligan²,

Young³

1974

Can. J. Anim. Sci.

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Comparison of Biological Mechanisms for Conversion of Feed to Meat

Armstrong

1976

Meat Animals

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Body Weight Gain and Wool Growth Response to Formaldehyde Treated Casein and Sulfur Amino Acids

Cited by 17 publications

References 0 publications

Rumen‐protected methionine supplementation and fibre production in alpacas (Vicugna pacos)

Rumen‐protected methionine supplementation and fibre production in alpacas (Vicugna pacos)

Effects of Volatile Fatty Acid Treatment on the Protection of Protein in the Rumen

Comparison of Biological Mechanisms for Conversion of Feed to Meat

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