Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-05T11:08:30.141Z Has data issue: false hasContentIssue false

Factors affecting faecal endogenous phosphorus loss in the sheep

Published online by Cambridge University Press:  27 March 2009

D. Scott
Affiliation:
The Rowett Research InstituteBucksburnAberdeen AB2 9SBUK
A. A. J. Rajaratne
Affiliation:
The Rowett Research InstituteBucksburnAberdeen AB2 9SBUK
W. Buchan
Affiliation:
The Rowett Research InstituteBucksburnAberdeen AB2 9SBUK

Summary

Sheep fitted with a ruminal and a duodenal cannula were used to study the effect of dry matter intake and the physical form of the diet on salivary P secretion and faecal endogenous P loss. At constant low P intake, changing the form of the diet had no effect on either parameter and while increasing dry matter intake did produce small changes in the partitioning of P excretion between urine and faeces it had no effect on overall endogenous P loss (faecal endogenous P + urine P) which was largely determined by P intake.

Type
Animals
Copyright
Copyright © Cambridge University Press 1995

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

Agricultural Research Council (1980). The Nutrient Requirements of Ruminant Livestock. Slough: Commonwealth Agricultural Bureaux.Google Scholar
Bailey, C. B. (1961). Saliva secretion and its relation to feeding in cattle. 4. The relationship between the concentrations of sodium, potassium, chloride and inorganic phosphate in mixed saliva and rumen fluid. British Journal of Nutrition 15, 489498.CrossRefGoogle ScholarPubMed
Bailey, C. B. & Balch, C. C. (1961). Saliva secretion and its relation to feeding in cattle. 1. The composition and rate of secretion of parotid saliva in a small steer. British Journal of Nutrition 15, 371382.CrossRefGoogle Scholar
Braithwaite, G. D. (1982). Endogenous faecal loss of calcium by ruminants. Journal of Agricultural Science, Cambridge 99, 355358.CrossRefGoogle Scholar
Braithwaite, G. D. (1984). Some observations on phosphorus homoeostasis and requirements of sheep. Journal of Agricultural Science, Cambridge 102, 295306.CrossRefGoogle Scholar
Braithwaite, G. D. (1985). Endogenous faecal loss of phosphorus in growing lambs and the calculation of phosphorus requirements. Journal of Agricultural Science, Cambridge 105, 6772.CrossRefGoogle Scholar
Challa, J. & Braithwaite, G. D. (1988 a). Phosphorus and calcium metabolism in growing calves with special emphasis on phosphorus homoeostasis. 1. Studies of the effect of changes in the dietary phosphorus intake on phosphorus and calcium metabolism. Journal of Agricultural Science, Cambridge 110, 573581.CrossRefGoogle Scholar
Challa, J. & Braithwaite, G. D. (1988 b). Phosphorus and calcium metabolism in growing calves with special emphasis on phosphorus homoeostasis. 2. Studies of the effect of different levels of phosphorus, infused abomasally, on phosphorus metabolism. Journal of Agricultural Science, Cambridge 110, 583589.CrossRefGoogle Scholar
Challa, J., Braithwaite, G. D. & Dhanoa, M. S. (1989). Phosphorus homoeostasis in growing calves. Journal of Agricultural Science, Cambridge 112, 217226.CrossRefGoogle Scholar
Cohen, R. D. H. (1980). Phosphorus in rangeland ruminant nutrition: a review. Livestock Production Science 7, 2537.CrossRefGoogle Scholar
Denton, D. A. (1956). The effect of Na+ depletion on the Na+: K+ ratio of the parotid saliva of the sheep. Journal of Physiology 131, 516525.CrossRefGoogle Scholar
Doyle, P. T., Egan, J. K., & Thalen, A. J. (1982). Parotid saliva of sheep. I. Effects of level of intake and type of roughage. Australian Journal of Agricultural Research 33, 573584.CrossRefGoogle Scholar
Faichney, G. J. (1975). The use of markers to partition digestion within the gastro-intestinal tract of ruminants. In Digestion and Metabolism in the Ruminant (Eds McDonald, & Warner, A. C. I.), pp. 277–291. Armidale: University of New England Publishing Unit.Google 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 chimaeraderived sheep. Journal of Agricultural Science, Cambridge 101, 597602.CrossRefGoogle Scholar
Gueguen, L. (1982). French recommended dietary allowances for calcium and phosphorus in sheep and cattle. 33rd European Association for Animal Production, Leningrad.Google Scholar
Institut National De La Recherche Agronomique (1978). Alimentation des Ruminants. Versailles: INRA Publications.Google Scholar
Lawes Agricultural Trust (1977). Genstat V, Mark 4.01. Rothamsted Experimental Station, Harpenden, Hertfordshire.Google Scholar
Lawlor, M. J., Giesecke, D. & Walser-Kärst, K. (1966). Comparative studies on the digestive physiology of sheep fed on semi-purified or roughage-concentrate diets. 1. Food and water intake, rumen volume and rates of parotid secretion. British Journal of Nutrition 20, 373382.CrossRefGoogle ScholarPubMed
Manas-Almendros, M., Ross, R. & Care, A. D. (1982). Factors affecting the secretion of phosphate in parotid saliva in the sheep and goat. Quarterly Journal of Experimental Physiology 67, 269280.CrossRefGoogle ScholarPubMed
National Research Council (1985). Nutrient Requirements of Sheep. Washington DC: National Academy Press.Google Scholar
Roach, A. G. (1965). Application of Technicon Autoanalyser equipment to the routine determination of calcium and phosphorus in animal feedstuffs. In Automation in Analytical Chemistry, Technicon Symposia (Ed. Skeggs, L. T.), pp. 137141. New York: Mediad Incorporated.Google Scholar
Sato, H., Kato, S. & Tsuda, T. (1976). Effect of hay to concentrate ratio on parotid secretion and its sodium, potassium and phosphorus levels in sheep. Japanese Journal of Veterinary Science 38, 347354.Google ScholarPubMed
Scott, D. & Beastall, G. (1978). The effects of intravenous phosphate loading on salivary phosphate secretion and plasma parathyroid hormone levels in the sheep. Quarterly Journal of Experimental Physiology 63, 147156.CrossRefGoogle ScholarPubMed
Scott, D. & Buchan, W. (1987). The effects of feeding either hay or grass diets on salivary phosphorus secretion, net intestinal phosphorus absorption and on the partition of phosphorus excretion between urine and faeces in the sheep. Quarterly Journal of Experimental Physiology 72, 331338.CrossRefGoogle ScholarPubMed
Scott, D. & Buchan, W. (1988). The effects of feeding pelleted diets made from either coarsely or finely ground hay on phosphorus balance and on the partition of phosphorus excretion between urine and faeces in the sheep. Quarterly Journal of Experimental Physiology 73, 315322.CrossRefGoogle ScholarPubMed
Technical Committee on Responses to Nutrients (1991). Report 6: a reappraisal of the calcium and phosphorus requirements of sheep and cattle. Nutrition Abstracts and Reviews (Series B) 61, 573612.Google Scholar
Ternouth, J. H. (1989). Endogenous losses of phosphorus by sheep. Journal of Agricultural Science, Cambridge 113, 291297.Google Scholar
Tomas, F. M. & Somers, M. (1974). Phosphorus homeostasis in sheep. I. Effects of ligation of parotid salivary ducts. Australian Journal of Agricultural Research 25, 475483.CrossRefGoogle Scholar
Wan Zahari, M., Thompson, J. K., Scott, D. & Buchan, W. (1990). The dietary requirements of calcium and phosphorus for growing lambs. Animal Production 50, 301307.Google Scholar
Wilson, A. D. & Tribe, D. E. (1963). The effect of diet on the secretion of parotid saliva by sheep. I. The daily secretion of saliva by caged sheep. Australian Journal of Agricultural Research 14, 670679.CrossRefGoogle Scholar
Young, D. S. (1966). An improved automated method for the automatic determination of serum inorganic phosphate. Journal of Clinical Pathology 19, 397399.CrossRefGoogle Scholar