Hostname: page-component-7479d7b7d-wxhwt Total loading time: 0 Render date: 2024-07-15T08:29:07.895Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Published online by Cambridge University Press:  02 September 2010

J. H. D. Prescott ,
A. S. El-Shobokshy  and
D. G. Armstrong
J. H. D. Prescott
Affiliation:
School of Agriculture, The University, Newcastle upon Tyne
A. S. El-Shobokshy
Affiliation:
School of Agriculture, The University, Newcastle upon Tyne
D. G. Armstrong
Affiliation:
School of Agriculture, The University, Newcastle upon Tyne
Get access

Summary

1. Two experiments have been carried out to study the nutritive value of dilute solutions of fatty acids (consisting mainly of ammonium acetate) when incorporated in the diet of lactating Jersey cows.

The first, a continuous trial, extended over a total of 17 weeks and involved five pairs of cows. One cow in each pair received the treatment and one the control diet. The second trial, of change-over design, involved four pairs of cows; one cow in each pair received one or other of the experimental diets alternately over four 28-day periods.

2. The cows received basic diets comprising hay ad libitum and concentrates regulated according to milk yield. On the control treatment cows received water and a concentrate containing an appropriate percentage of groundnut cake; on treatment cows received a dilute solution of salts and an ‘all-cereal’ concentrate. The treatment provided cows with approximately 30% of their total DCP intake as ammonia-N and with 270 to 310 g of acetate and 43 to 49 g of propionate/day from the salt solution.

3. Solutions of salts have been offered to the cows at various concentrations in the range 0·25 to 2·6% (w/v) as a substitute for drinking water. Nineteen of the 20 cows consumed solutions of 1·4% concentration in normal quantities equivalent to water.

4. Treatment was associated with an appreciable depression in the yield of cows producing 13 to 14 kg of milk per head/day, but had little effect on the yield of cows producing 10 to U kg or less. This result has been discussed with reference to the role of the ammonia-N as a substitute for protein-N.

5. Treatment significantly increased the fat content of the milk produced by these Jersey cows above the high control level of 5·4%. Total milk fat production was also increased. This result has been discussed with reference to the role of acetate in dairy cow diets.

Type
Research Article
Information
Animal Production , Volume 11 , Issue 2 , May 1969 , pp. 195 - 207
Copyright
Copyright © British Society of Animal Science 1969

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Agricultural Research Council 1965. The Nutrient Requirements of Farm Livestock. No. 2, Ruminants. Agricultural Research Council, London.Google Scholar
Armstrong, D. G. and Trinder, N. 1966. The use of urea and other non-protein nitrogenous substances in rations for ruminants. J. Univ. Newcastle upon Tyne Agric. Soc., 20: 3–15.Google Scholar
Balch, C. C. 1958. Observations on the act of eating in cattle. Br. J. Nutr. 12: 330–345.CrossRefGoogle ScholarPubMed
Balch, C. C. and Rowland, S. J. 1959. Studies of the secretion of milk of low fat content by cows on diets low in hay and high in concentrates 7. The effect of administration of volatile fatty acids to cows giving normal milk and milk of low fat content. J. Dairy Res. 26: 162–172.CrossRefGoogle Scholar
Bartlett, S. and Blaxter, K. L. 1947. The value of urea as a substitute for protein in the rations of dairy cattle. J. agric. Sci., Camb. 37: 32–44.CrossRefGoogle Scholar
Bath, I. H. and Rook, J. A. F. 1963. The evaluation of cattle foods and diets in the terms of the ruminal concentration of volatile fatty acids. J. agric. Sci., Camb. 61: 341–348.CrossRefGoogle Scholar
Blaxter, K. L. and Wainman, F. W. 1964. The utilization of the energy of different rations by sheep and cattle for maintenance and for fattening. J. agric. Sci., Camb. 63: 113–128.CrossRefGoogle Scholar
Bondarenko, G. A. and Slesarev, I. K. 1962. Effect of ammonium acetate on increasing milk fat, intermediary metabolism and processes of rumen digestion in Jersey and Friesian cows. Trudy Vses. Nauč.-Pssled. Inst. Žvotnovodstva. 24: 57–77. (See Nutr. Abstr. Rev. 1965. 35: Abstr. 5820).Google Scholar
Campbell, T. C., Loosli, J. K., Warner, R. G. and Tasaki, I. 1963. Utilization of biuret by ruminants. J. Anim. Sci. 22: 139–145.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
El-Shobokshy, A. S. 1968. Studies in dairy cow nutrition with reference to silage intake and the utilization of ammonium salts of fatty acids in milk production. Ph.D. Thesis. Univ. Newcastle upon Tyne.Google Scholar
Evans, R. E. 1960. Rations for livestock, Bull. No. 48. Ministry of Agriculture, Fisheries and Food. London.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
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
Reid, J. T. 1953. Urea as a protein replacement for ruminants. A review. J. Dairy Sci. 36: 955–996.CrossRefGoogle Scholar
Rook, J. A. F., Balch, C. C. and Johnson, V. W. 1965. Further observations of the effects of intraruminal infusions of volatile fatty acids and of lactic acid on the yield and composition of the milk of the cow. Br. J. Nutr. 19: 93–99.CrossRefGoogle ScholarPubMed
Storry, J. E., and Rook, J. A. F. 1966. The relationship in the cow between milk fat secretion and ruminal volatile fatty acids. Br. J. Nutr. 20: 217–228.CrossRefGoogle ScholarPubMed
Tyznik, W. and Allen, N. N. 1951. The relation of roughage intake to the fat content of the milk and the level of fatty acids in the rumen. J. Dairy Sci. 34: 493 (Proc.).Google Scholar
Winchester, C. F., and Morris, M. J. 1956. Water intake of cattle. J. Anim. Sci. 15: 722–740.CrossRefGoogle Scholar
Zel'ner, V. R. 1963. Effect of ammonium acetate on milk fat and digestion of cows. Žvotnovodstvo. No. 6, 19–21. (See Nutr. Abstr. Rev. 1964. 34: Abstr. 3286).Google Scholar