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The effects of body condition at calving, food intake and performance in early lactation on blood composition of dairy cows given complete diets

Published online by Cambridge University Press:  02 September 2010

P. C. Garnsworthy  and
J. H. Topps
P. C. Garnsworthy
Affiliation:
School of Agriculture, 581 King Street, Aberdeen AB9 1UD
J. H. Topps
Affiliation:
School of Agriculture, 581 King Street, Aberdeen AB9 1UD
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Abstract

In each of two trials, three groups of eight cows, with condition scores of 1-5 to 2, 2-5 to 3 and 3-5 to 4 at calving, were given a complete diet for the first 16 weeks of lactation. Food intake, milk yield, live weight and condition score were measured, and related to levels of plasma glucose and free fatty acids, serum insulin, prolactin and progesterone in weekly blood samples, in an attempt to explain differences in food intake.

In both trials, levels of plasma free fatty acids were high after calving for all cows and declined rapidly until week 8, after which they were fairly constant. Glucose and insulin levels increased after calving, producing curves similar to that for dry-matter intake in the first 8 weeks of lactation. Prolactin levels fluctuated too markedly to provide useful information. Progesterone levels increased until week 7 and then fluctuated at 3-week intervals coincident with oestrus. Dry-matter intake was negatively correlated with free fatty acid levels and positively correlated with insulin in trial 1, and with glucose and progesterone in both trials.

Information

Type
Research Article
Information
Animal Production , Volume 35 , Issue 1 , August 1982 , pp. 121 - 125
Copyright
Copyright © British Society of Animal Science 1982

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References

REFERENCES

Abraham, G. E. 1969. Solid-phase radioimmunoassay of estradiol-17β. J clin. Endocr. Metab. 29: 866–870.CrossRefGoogle Scholar
Baile, C. A. and Forbes, J. M. 1974. Control of feed intake and regulation of energy balance in ruminants. Physiol. Rev. 54: 160–214.Google Scholar
Baird, J. D., Black, M. W. and Faulkner, D. E. 1967. Semi-automated method for the determination of free fatty acids in plasma. J. clin. Path. 20: 905–909.CrossRefGoogle ScholarPubMed
Bines, J. A. and Hart, I. C. 1978. Hormonal regulation of the partition of energy between milk and body tissue in adult cattle. Proc. Nutr. Soc. 37: 281–287.Google Scholar
Chesworth, J. M. 1977. Radioimmunoassays of ovine LH and ovine prolactin using polymerized second antisera. Analyt. Biochem. 80: 31–40.CrossRefGoogle ScholarPubMed
Faulkner, D. E. 1965. An automated micro determination of blood-glucose with the AutoAnalyzer. Analyst, Lond. 90: 736–744.CrossRefGoogle ScholarPubMed
Garnsworthy, P. C. and Topps, J. H. 1982. The effect of body condition of dairy cows at calving on their food intake and performance when given complete diets. Anim. Prod. 35: 113–119.Google Scholar
Hart, I. C., Bines, J. A., Morant, S. V. and Ridley, J. L. 1978. Endocrine control of energy metabolism in the cow: comparison of the levels of hormones (prolactin, growth hormone, insulin and thyroxine) and metabolites in the plasma of high- and low-yielding cattle at various stages of lactation. J. Endocr. 77: 333–345.CrossRefGoogle ScholarPubMed
Henderson, G. D. and Chesworth, J. M. 1977. The choice of charcoal for use in steroid radioimmunoassay. Lab. Pract. 26: 866–867.Google Scholar
Jarrett, I. G., Filsell, O. H. and Ballard, F. J. 1974. Metabolic and endocrine interrelationships in normal and diabetic sheep. Hormone Metab. Res., Suppl. 4, pp. 111–116.Google Scholar
Journet, M. and Remond, B. 1976. Physiological factors affecting the voluntary intake of feed by cows: a review. Livest. Prod. Sci. 3: 129–146.Google Scholar
McAtee, J. W. and Trenkle, A. 1971. Effects of feeding, fasting, glucose or arginine on plasma prolactin levels in the bovine. Endocrinology 89: 730–734.Google Scholar
Manns, J. G. and Boda, J. M. 1965. Effects of ovine growth hormone and prolactin on blood glucose, serum insulin, plasma nonesterified fatty acids and amino nitrogen in sheep. Endocrinology 76: 1109–1114.Google Scholar
Peters, R. R. and Tucker, H. A. 1978. Prolactin and growth hormone responses to photoperiod in heifers. Endocrinology 103: 229–234.CrossRefGoogle ScholarPubMed
Swan, H. 1976. The physiological interrelationship of reproduction, lactation and nutrition in the cow. In Principles of Cattle Production (ed. Swan, H. and Broster, W. H.), pp. 85–102. Butterworth, London.Google Scholar
Trenkle, A. 1978. Relation of hormonal variations to nutritional studies and metabolism of ruminants. J. Dairy Sci. 61: 281–293.CrossRefGoogle ScholarPubMed
West, C. E. and Passey, R. F. 1967. Effect of glucose load and of insulin on the metabolism of glucose and of palmitate in sheep. Biochem. J. 102: 58–64.CrossRefGoogle Scholar