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Effects of restricting the water intake of dairy cows upon their milk yield, body weight and blood composition

Published online by Cambridge University Press:  02 September 2010

W. Little ,
B. F. Sansom ,
R. Manston  and
W. M. Allen
W. Little
Affiliation:
ARC Institutefor Research on Animal Diseases, Compton, Newbury, Berkshire, RG16 ONN
B. F. Sansom
Affiliation:
ARC Institutefor Research on Animal Diseases, Compton, Newbury, Berkshire, RG16 ONN
R. Manston
Affiliation:
ARC Institutefor Research on Animal Diseases, Compton, Newbury, Berkshire, RG16 ONN
W. M. Allen
Affiliation:
ARC Institutefor Research on Animal Diseases, Compton, Newbury, Berkshire, RG16 ONN
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Summary

1. Water intake was measured in eight lactating cows. Subsequently n i an experiment of a 4 × 4 Latin square design, each cow received 100, 87, 73 and 60% of its voluntary intake for 6 days followed by an 8-day recovery period.

2. Measurements were made of the intake of feed, milk yield and quality, water, Na and K balances, metabolic profiles, and serum and urine osmolalities. The cows were weighed at the beginning and end ofthe experimental periods, and pulse, respiration and rumination rates and rectal temperatures were measured daily.

3. Milk yield decreased significantly with increasing water deprivation. A 40% reduction in water intake was associated with a 16% decrease in intake of dry matter and a concomitant 16% decrease in milk yield. The only significant change in milk composition was a small increase in lactose concentration with increasing water deprivation.

4. There was no significant reduction in urine output, but the output of water in faeces was reduced and there was evidence of a reduction i n total body water which approximated the reduction in body weight. 5. Concentrations of serum Na and urea-N and serum osmolality increased significantly with increasing water deprivation.

Type
Research Article
Information
Animal Production , Volume 22 , Issue 3 , June 1976 , pp. 329 - 339
Copyright
Copyright © British Society of Animal Science 1976

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References

REFERENCES

Anderson, D. M. 1969. In vitro inhibition of glycolysis in blood and its effect on the haematocrit. J. comp. Path. 79: 525–535.CrossRefGoogle ScholarPubMed
Balch, C. C., Balch, D. A., Johnson, V. W. and Turner, J. 1953. Factors affecting the utilization of food by dairy cows. 7. The effect of limited water intake on the digestibility and rate of passage of hay. Br. J. Nutr. 7: 212–224.CrossRefGoogle ScholarPubMed
Castle, M. E. 1972. A study of the intake of drinking water by dairy cows at grass. J. Br. Grassld Soc. 11: 207–210.CrossRefGoogle Scholar
Castle, M. E. and Thomas, T. P. 1975. The water intake of British Friesian cows on rations containing various forages. Anim. Prod. 20: 181–189.Google Scholar
English, P. B. 1966. A study of water and electrolyte metabolism in sheep. 1. External balances of water, sodium, potassium and chloride. Res. vet. Sci. 7: 233–257.CrossRefGoogle Scholar
Konar, A. and Thomas, P. C. 1970. The effect of dehydration and intravenous infusion of vasopressin on milk secretion in the goat. Br. vet. J. 126: xxv–xxviii.Google ScholarPubMed
MacFarlane, W. V., Morris, R. J. H., Howard, B., McDonald, J. and BUDTZ-OLSEN, O. E. 1961. Water and electrolyte changes in tropical Merino sheep exposed to dehydration during summer. Aust. J. agric. Res. 12: 889–912.CrossRefGoogle Scholar
Ohya, M. 1964. [Experimental studies on dehydration in ruminants. 1. Clinical signs and blood changes in goats under prolonged water restriction.] Jap. J. vet. Sci. 26: 325–341.Google Scholar
Payne, J. M., Dew, S. M., Manston, R. and Faulks, M. 1970. The use of a metabolic profile test in dairy herds. Vet. Rec. 87: 150–158.CrossRefGoogle ScholarPubMed
Payne, J. M., Rowlands, G. J., Manston, R. and Dew, S. M. 1973. A statistical appraisal of the results of metabolic profile tests on 75 dairy herds. Br. vet. J. 129: 370–381.CrossRefGoogle ScholarPubMed
Popovici, D., Jurenkova, G., Raitaru, M. and CHIRILÂ, E. 1973. [Effect of water intake and electrolytes on milk secretion and composition.] Lucr. stünt. Inst. Cere. Crest. Taurin. 1: 69–86.Google Scholar
Rowlands, G. J., Little, W., Manston, R. and Dew, S. M. 1974. The effect of season on the composition of the blood of lactating and non-lactating cows as revealed from repeated metabolic profile tests on 24 dairy herds. J. agric. Sci., Camb. 83: 27–35.CrossRefGoogle Scholar
Scrimgeour, D. S. and Thompson, J. K. 1975. A note on the effect of cyclical changes in energy intake on lactating dairy cows. Anim. Prod. 21: 85–88.Google Scholar
Thomas, T. P. 1971. Drinking by dairy cows at grass. Anim. Prod. 13: 399–400 (Abstr.).Google Scholar
Utley, P. R., Bradley, N. W. and Boling, J. A. 1970. Effect of water restriction on nitrogen metabolism in bovine fed two levels of nitrogen. J. Nutr. 100: 551–556.CrossRefGoogle ScholarPubMed
Wheelock, J. V., Rook, J. A. F. and Dodd, F. H. 1965. The relationship in the cow between the osmotic pressure of milk and of blood. J. Dairy Res. 32: 79–88.CrossRefGoogle Scholar