Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-25T05:28:45.888Z Has data issue: false hasContentIssue false
  • English
  • Français

The effect of dietary intake of calcium and dry matter on the absorption and excretion of calcium and phosphorus by growing lambs

Published online by Cambridge University Press:  27 March 2009

A. C. Field ,
J. A. Woolliams  and
R. A. Dingwall
A. C. Field
Affiliation:
Moredun Research Institute, Edinburgh, EH17 7JH
J. A. Woolliams
Affiliation:
Animal Breeding Research Organisation, Edinburgh, EH9 3JR
R. A. Dingwall
Affiliation:
Moredun Research Institute, Edinburgh, EH17 7JH
Get access Rights & Permissions [Opens in a new window]

Summary

The isotope dilution technique was used to measure endogenous faecal excretion and absorption of dietary Ca and P by growing lambs. Groups of four lambs were given 0·8 or 1·2 kg/day of a pelleted barley and soya-bean diet containing 4·2 g P/kg D.M. and supplemented to contain 1·79, 3·52 or 4·67 g Ca/kg D.M.

At the lowest dietary concentration of Ca, absorption of Ca was insufficient to meet the Ca required for deposition in the newly formed bone matrix of the skeleton; retention was 0·39, 1·16 and 1·12 g/day with increasing dietary Ca concentration. The proportion of dietary Ca absorbed decreased (P < 0·001) with increasing Ca intake, ranging from 0·85 to 0·44. Endogenous faecal excretion of Ca was independent of the absorption of dietary Ca, but increased (P < 0·05) from 17·2 at the lower to 21·1 mg/kg live weight/day at the higher D.M. intake. Plasma concentration of Ca was higher for the female (2·51) than the male (2·33 mmol/1) lambs and increased linearly (P < 0·001) with dietary concentration of Ca from 2·31 to 2·52 mmol/l.

The retention of P increased with Ca and D.M. intake. On the other hand, the proportion of dietary P absorbed (0·85) was independent of Ca intake and hence of P retention. Increases in P retention were reflected by decreases in urinary P, but not in endogenous faecal excretion. Endogenous faecal excretion of P increased with D.M. or P intake from 17·9 at the lower to 33·5 mg/kg live weight/day at the higher intake.

The results are discussed in relation to dietary allowances of Ca and the mechanism of P homoeostasis.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 105 , Issue 2 , October 1985 , pp. 237 - 243
Copyright
Copyright © Cambridge University Press 1985

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. London: H.M.S.O.Google Scholar
Agricultural Research Council (1980). The Nutrient Requirements of Ruminant Livestock. Farnham Royal: Commonwealth Agricultural Bureaux.Google Scholar
Bailey, C. B. & Balch, C. C. (1961). Salivary secretion and its relation to feeding in cattle. 2. The composition and rate of secretion of parotid saliva in a small steer. British Journal of Nutrition 15, 371–382.CrossRefGoogle Scholar
Blaney, B. J., Gartner, R. J. W. & Head, T. A. (1982). The effects of oxalate in tropical grasses on calcium, phosphorus and magnesium availability to cattle. Journal of Agricultural Science, Cambridge 97, 365–372.Google Scholar
Boxebeld, A., Gueguen, L., Hannequart, G. & Durand, M. (1983). Utilisation of phosphorus and calcium and minimal maintenance requirement for phosphorus in growing sheep fed on low-phosphorus diets. Reproduction, Nutrition Développement 23, 1043–1053.CrossRefGoogle Scholar
Braithwaite, G. D. (1980). The effect of dose rate of 1-α-hydroxycholecalciferol on calcium and phosphorus metabolism in sheep. British Journal of Nutrition 44, 183–191.CrossRefGoogle ScholarPubMed
Braithwaite, G. D. (1981). Effect of 1-α-hydroxycholecalciferol on calcium and phosphorus metabolism in sheep given high or low calcium diets. Journal of Agricultural Science, Cambridge 96, 291–299.CrossRefGoogle Scholar
Braithwaite, G. D. (1982). Endogenous faecal loss of calcium by ruminants. Journal of Agricultural Science, Cambridge 99, 355–358.CrossRefGoogle Scholar
Braithwaite, G. D. (1983). Calcium and phosphorus requirements of the ewe during pregnancy and lactation. 1. Calcium. British Journal of Nutrition 50, 711–722.CrossRefGoogle Scholar
Braithwaite, G. D. (1984 a). Some observations on phosphorus homoeostasis and requirements of sheep. Journal of Agricultural Science, Cambridge 102, 295–306.CrossRefGoogle Scholar
Braithwaite, G. D. (1984 b). Changes in phosphorus metabolism of sheep in response to the increased demands for P associated with an intravenous infusion of calcium. Journal of Agricultural Science, Cambridge 102, 135–139.CrossRefGoogle Scholar
Dokoh, S., Pike, J. W., Chandler, J. S., Mancini, J. M. & Haussler, M. R. (1981). An improved radio receptor assay for 1,25-dihydroxyvitamin D in human plasma. Analytical Biochemistry 116, 211–222.CrossRefGoogle Scholar
Field, A. C. (1981). Some thoughts on dietary requirements of macroelements. Proceedings of the Nutrition Society 40, 267–272.CrossRefGoogle ScholarPubMed
Field, A. C., Coop, R. L., Dingwall, R. A. & Munro, C. S. (1982). The phosphorus requirements for growth and maintenance of sheep. Journal of Agricultural Science, Cambridge 99, 311–317.CrossRefGoogle Scholar
Field, A. C., Kamphues, J. & Woolliams, J. A. (1983). The effect of dietary intake of calcium and phosphorus on the absorption and excretion of phosphorus in chimaera-derived sheep. Journal of Agricultural Science, Cambridge 101, 597–602.CrossRefGoogle Scholar
Field, A. C., Woolliams, T. A., Dingwall, R. A. & Munro, C. S. (1984). Animal and dietary variation in the absorption and metabolism of phosphorus by sheep. Journal of Agricultural Science, Cambridge 103, 283–291.CrossRefGoogle Scholar
Imawari, M., Kozawa, K., Yoshida, T. & Osuga, T. (1982). A simple and sensitive assay for 25-hydroxyvitamin D, 24,25-dihydroxyvitamin D and 1,25-dihydroxyvitamin D in human serum. Clinica Chimica Ada 124, 63–73.Google Scholar
Institut National de la Recherche Aoronomique (1978). Alimentation des Ruminants. Versailles: INRA Publications.Google Scholar
Lofgreen, G. P. (1960). The availability of the phosphorus in dicalcium phosphate, bone meal, soft phosphate and calcium phytate for mature wethers. Journal of Nutrition 70, 58–62.CrossRefGoogle Scholar
Scott, D. & McLean, A. F. (1981). Control of mineral absorption in ruminants. Proceedings of the Nutrition Society 40, 257–266.CrossRefGoogle ScholarPubMed
Scott, D., McLean, A. F. & Buchan, V. (1984). The effect of variation in phosphorus intake and net intestinal phosphorus absorption, salivary phosphorus secretion and pathway of excretion in sheep fed roughage diet. Quarterly Journal of Experimental Physiology 69, 439–452.CrossRefGoogle Scholar
Shepard, R. M., Horst, R. L., Hamstra, A. J. & de Luca, H. F. (1979). Determination of vitamin D and its metabolites in plasma from normal and anephric man. Biochemistry Journal 182, 55–69.CrossRefGoogle ScholarPubMed
Shipley, R. A. & Clark, R. E. (1972). Tracer Methods for in vivo Kinetics, p. 82. New York: Academic Press.Google Scholar
Sykes, A. K. & Field, A. C. (1972). Effects of dietary deficiencies of energy, protein and calcium on the pregnant ewe. I. Body composition and mineral content of the ewes. Journal of Agricultural Science, Cambridge 78, 109–117.CrossRefGoogle Scholar
Tepper, T. & de Vos, L. (1975). An automated determination of free plasma hydroxyproline. Clinica Chimica Acta 59, 373–375.CrossRefGoogle ScholarPubMed
Van Leeuwen, J. M. & Visser, M. de (1976). Dynamics of calcium metabolism in lactating cows when the calcium content of the ration is reduced. Tijdschrift voor Diergenesskunde 101, 825–834.Google ScholarPubMed