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Ammonium salts of fatty acids for milk production. 3. The effect of a salt solution containing ammonium acetate on milk yield and composition in Jersey cows fed on a high concentrate diet

Published online by Cambridge University Press:  02 September 2010

H. A. Khalifa ,
J. H. D. Prescott  and
D. G. Armstrong
H. A. Khalifa
Affiliation:
School of Agriculture, The University, Newcastle upon Tyne
J. H. D. Prescott
Affiliation:
School of Agriculture, The University, Newcastle upon Tyne
D. G. Armstrong
Affiliation:
School of Agriculture, The University, Newcastle upon Tyne
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Summary

1. The experiment involved four pairs of Jersey cows in a double reversal trial with two treatments.

2. The control and acetate treatments involved iso-caloric concentrate mixtures together with hay. The concentrates and hay were given in constant ratio of 3 : 1 and total feed intake was regulated according to milk yield. Cows on the acetate treatment received a dilute solution of fatty acids (1·7 % w/w) and an all-cereal concentrate mixture; those on the control diet received water and a concentrate containing 10% groundnut meal. The dilute solution of fatty acids provided approximately 31 % of the total digestible crude protein intake as ammonia-N, and 208 g acetate and 34 g propionate per day.

3. The two treatments gave similar dry-matter intakes. The acetate treatment caused a slight and significant depression of milk yield but the fat content of the milk and fat-corrected milk yield were slightly increased by treatment, though not significantly so. The results have been discussed with reference to the end products of digestion in the rumen and role of ammonia-N as a substitute for protein-N.

Type
Research Article
Information
Animal Production , Volume 16 , Issue 2 , April 1973 , pp. 185 - 193
Copyright
Copyright © British Society of Animal Science 1973

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References

REFERENCES

Agricultural Research Council. 1965. The Nutrient Requirements of Farm Livestock. No. 2. Ruminants. Agricultural Research Council, London.Google Scholar
Armstrong, D. G. 1968. The effect of the amount and physical form of feed on milk secretion in the cow. Proc. Nutr. Soc. 27: 57–65.CrossRefGoogle Scholar
Armstrong, D. G. and Prescott, J. H. D. 1971. Amount and physical form and composition of feed and milk secretion in the dairy cow. In Lactation (ed. Falconer, I. R.), pp. 349–377. Butterworth, London.Google Scholar
Armstrong, D. G. and Trinder, N. 1966. The use of urea and other non-protein nitro-genous substances in rations for ruminants. J. Univ. Newcastle upon Tyne agric. Soc. 20: 3–15.Google Scholar
Balch, C. C., Balch, D. A., Bartlett, S., Hosking, Z. D., Johnson, V. W., Rowland, S. J. and Turner, J. 1955. Studies on the secretion of milk of low fat content by cows on diets low in hay and high in concentrates. V. The importance of the type of starch in the concentrates. J. Dairy Res. 22: 10–15.CrossRefGoogle Scholar
Blaxter, K. L. and Wainman, F. W. 1964. The utilisation of energy of different rations by sheep and cattle for maintenance and for fattening. J. agric. Sci., Camb. 63: 341–348.CrossRefGoogle Scholar
Brooks, O. L., Miller, S. J., Beaty, E. R. and Clifton, C. M. 1962. Performance of dairy cows fed pelleted and baled coastal bermuda grass and alfalfa hay. J. Dairy Sci. 45: 1188–1191.CrossRefGoogle Scholar
Chalupa, W., O'Dell, G. D., Kutches, A. J. and Lavker, R. 1970. Supplemental corn silage or baled hay for correction of milk fat depressions produced by feeding pellets as the sole forage. J. Dairy Sci. 53: 208–214.CrossRefGoogle Scholar
Davis, C. L. 1967. Acetate production in the rumen of cows fed either control or low fibre, high-grain diets. J. Dairy Sci. 50: 1621–1625.CrossRefGoogle ScholarPubMed
Dimick, P. S., McCarthy, R. D. and Patton, S. 1970. Milk fat synthesis. In Physiology of Digestion and Metabolism in the Ruminant (ed. Phillipson, A. T.), pp. 528–541. Oriel Press, Newcastle upon Tyne.Google Scholar
El-Shobokshy, A. S. 1968. Studies in dairy cow nutrition with reference to silage intake and the utilisation of ammonium salts of fatty acids in milk production. Ph.D. Thesis, University of Newcastle upon Tyne.Google Scholar
Hinders, R. G. and Owen, F. G. 1963. Relationships between efficiency of milk production and ruminal volatile fatty acids of cows fed iso-caloric rations of varied concentrate levels. J. Dairy Sci. 46: 1246–1250.CrossRefGoogle Scholar
Hutton, K. 1967. Some aspects of fatty acid synthesis in the ruminant. Ph.D. Thesis, University of Newcastle upon Tyne.Google Scholar
Hutton, K., Prescott, J. H. D., Seeley, R. C. and Armstrong, D. G. 1969. Ammonium salts of fatty acids for milk production. 2. The effect of feeding a salt solution containing ammonium acetate on the yield and fatty acid composition of Jersey milk fat. Anim. Prod. 11:209–218.Google Scholar
Hutton, K. and Seeley, R. C. 1966. Rapid method for saponiflcation of milk fat and subsequent quantitative estimation of the lower fatty acids. Nature, Lond. 212: 1614–1615.CrossRefGoogle Scholar
Jackson, P. and Rook, J. A. F. 1970. Responses in milk yield and composition to the inclusion of ammonium salts of short-chain fatty acids in the drinking water of dairy cows. Anim. Prod. 12: 503–512.Google Scholar
Kay, M., Walker, T. and McKiddie, G. 1967. The effect of ammonium acetate on the yield and composition of milk from heifers. Anim. Prod. 9: 477–482.Google Scholar
Lucas, H. L. 1956. Switchback trials for more than two treatments. J. Dairy Sci. 39: 146–154.CrossRefGoogle Scholar
Neimann-SØrensen, A. 1969. Crop conservation and grassland. Proc 3rd Meeting Euro. GrassldFedn, pp. 105–112.Google Scholar
Prescott, J. H. D., El-shobokshy, A. S. and Armstrong, D. G. 1969. Ammonium salts of fatty acids for milk production. 1. The effect of feeding a salt solution containing ammonium acetate on the yield and composition of milk produced by Jersey cows fed hay/concentrate diets. Anim. Prod. 11: 195–207.Google Scholar
Snedecor, G. W. 1956. Statistical Methods. 5th ed. Iowa State Univ. Press, Ames, la.Google Scholar
Storry, J. E. and Rook, J. A. F. 1965. Effects of intravenous infusion of acetate, β-hydroxybutyrate, triglycerides and other metabolites on the composition of the milk fat and blood in cows. Biochem. J. 97: 879–886.CrossRefGoogle ScholarPubMed