Skip to main content

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.

Close cookie message
Cancel
×
×
Home
  • Home
Article
  • Cited by 19
  • Cited by
    Crossref Citations
    Crossref logo
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.
    McGregor, B.A. 2011. Incisor development, wear and loss in sheep and their impact on ewe production, longevity and economics: A review. Small Ruminant Research, Vol. 95, Issue. 2-3, p. 79.
    West, DM 2002. Dental disease of sheep. New Zealand Veterinary Journal, Vol. 50, Issue. sup3, p. 102.
    Dove, H. and Milne, J. A. 1991. An evaluation of the effects of incisor dentition and of age on the performance of lactating ewes and their lambs. Animal Production, Vol. 53, Issue. 02, p. 183.
    Orr, M.B. and Mackey, R.D. 1991. A pilot study of dietary lime supplementation and periodontal disease in ewes in Southland. New Zealand Veterinary Journal, Vol. 39, Issue. 3, p. 111.
    1990. Forage in Ruminant Nutrition. p. 403.
    Orr, M.B. Mason, P. and Crosbie, S.F. 1985. The effect of gastro-intestinal parasitism on the temporary dentition of lambs. New Zealand Veterinary Journal, Vol. 33, Issue. 4, p. 48.
    Spence, J.A. Sykes, A.R. Atkinson, P.J. and Aitchison, G.U. 1985. Skeletal and blood biochemical characteristics of sheep during growth and breeding: A comparison of flocks with and without broken mouth. Journal of Comparative Pathology, Vol. 95, Issue. 4, p. 505.
    Morris, P.L. Whitley, B.D. Orrf, M.B. and Laws, A.J. 1985. A clinical study of periodontal disease in sheep. New Zealand Veterinary Journal, Vol. 33, Issue. 6, p. 87.
    1981. Abstracts of Communications. Proceedings of the Nutrition Society, Vol. 40, Issue. 03, p. 100A.
    Steele, K. W. and Henderson, H. V. 1977. Occurrence of periodontal disease in sheep in the Mangonui, Whangaroa, Hokianga, and Bay of Islands counties. New Zealand Journal of Agricultural Research, Vol. 20, Issue. 3, p. 301.
    Cutress, T. W. 1976. Histopathology of Periodontal Disease in Sheep. Journal of Periodontology, Vol. 47, Issue. 11, p. 643.
    Lucas, I. A. M. 1975. The contribution of science to the improvement of hill sheep production. Proceedings of the British Society of Animal Production (1972), Vol. 4, Issue. , p. 45.
    Field, A. C. Sykes, A. R. and Gunn, R. G. 1974. Effects of age and state of incisor dentition on faecal output of dry matter and on faecal and urinary output of nitrogen and minerals, of sheep grazing hill pastures. The Journal of Agricultural Science, Vol. 83, Issue. 01, p. 151.
    Sykes, A. R. Field, A. C. and Gunn, R. G. 1974. Effects of age and state of incisor dentition on the chemical composition of the skeleton of sheep grazing hill pastures. The Journal of Agricultural Science, Vol. 83, Issue. 01, p. 145.
    Suckling, G. W. Cutress, T. W. Healy, W. B. and Mattingley, J. 1974. Effects of liming a highly leached soil on periodontal health, serum composition, and body weight of sheep. New Zealand Journal of Agricultural Research, Vol. 17, Issue. 3, p. 311.
    Cutress, T. W. Suckling, G. W. Healy, W. B. Mattingley, J. and Aitken, W. M. 1972. Periodontal Disease in Sheep II. The Composition of Sera From Sheep with Periodontosis. Journal of Periodontology, Vol. 43, Issue. 11, p. 668.
    Sykes, A. R. and 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. The Journal of Agricultural Science, Vol. 78, Issue. 01, p. 109.
    Gunn, R. G. 1970. A note on the effect of Broken Mouth on the performance of Scottish Blackface hill ewes. Animal Production, Vol. 12, Issue. 03, p. 517.
    Gunn, R. G. 1969. A note on seasonal and age changes in the calcium, phosphorus and magnesium content of the blood of Scottish Blackface ewes, as influenced by calcium and phosphorus supplementation. The Journal of Agricultural Science, Vol. 73, Issue. 01, p. 159.
    ×
  • Get access
    Add to cart USD35.00
    Check if you have access via personal or institutional login
    Log in Register Recommend to librarian

The effects of calcium and phosphorus supplementation on the performance of Scottish Blackface hill ewes, with particular reference to the premature loss of permanent incisor teeth

  • R. G. Gunn (a1)
Summary

A subclinical calcium or phosphorus dietary deficiency on many hill pastures and a relationship between this and the premature loss of permanent incisor teeth are postulated. The effects of small individual supplements of calcium (12 g calcium carbonate suspended in water) or phosphorus (13 g monosodium phosphate in solution) supplied three times a week between mid-February and the end of May to Scottish Blackface ewes which grazed reseeded pasture in April and May were compared with those of no mineral supplement and with those of no mineral supplementon hill pastures throughout.

Neither supplement had any significant effect on the number or weights of lambs born or reared on reseeded pastures. Both resulted in significantly greater ewe live-weight gain during the treatment period, in a significant improvement in the firmness and permanence of the incisor teeth, and in significantly higher serum Ca levels during lactation. All effects increased with advancing age.

The use of hill pastures during late pregnancy and early lactation without any mineral supplement could result in significantly poorer ewe live-weight gain during the treatment period depending on season. This was also associated with significantly lighter single lambs at 6 weeks and with slower deterioration of the incisor teeth.

It is suggested that minerals lost from the body during lactation on reseeded pastures are not replaced during the autumn recovery period on hill pastures and that a gradual depletion occurs throughout life, leading possibly to demineralization of the alveolar bone and premature loss of the incisor teeth. It is suggested that this is indicative of a higher mineral requirement for maintenance of the permanent dentition than is necessary for normal acceptable growth andreproductive performance. Mineral content of hill herbage may therefore be too low to supply requirements at the levels of OM intake normal on hill pastures.

Copyright
COPYRIGHT: © Cambridge University Press 1969
References
Hide All
Agricultural Research Council (1965). The Nutrient Requirements of Farm Livestock, No. 2, Ruminants. London: H.M.S.O.
Benzie, D., Boyne, A. W., Dalgarno, A. C., Duckworth, J. & Hill, R. (1959). Studies of the skeleton of the sheep. III. The relationship between phosphorus intake and rosorption and repair of the skeleton in pregnancy and lactation. J. agric. Sci., Camb. 52, 1–12.
Benzie, D., Boyne, A. W., Dalgarno, A. C., Duckworth, J., Hill, R. & Walker, D. M. (1955). Studies of the skeleton of the sheep I. The effect of different levels of dietary calcium during pregnancy and lactation on individual bones. J. agric. Sci., Camb. 46, 425–39.
Benzie, D., Boyne, A. W., Dalgarno, A. C., Duckworth, J., Hill, R. & Walker, D. M. (1957). Studios of the skeleton of the sheep. II. The relationship between calcium intake and resorption and repair of the skeleton in pregnancy and lactation. J. agric. Sci., Camb. 48, 175–86.
Benzie, D., Boyne, A. W., Dalgarno, A. C., Duckworth, J., Hill, R. & Walker, D. M. (1960). Studies of the skeleton of the sheep. IV. The effects and interactions of dietary supplements of calcium, phosphorus, cod-liver oil and energy, as starch, on the skeleton of growing Blackface wethers. J. agric. Sci., Camb. 54, 202–21.
Benzie, D. & Cresswell, E. (1962). Studies of the dentition of sheep. IV. Radiological studies from investigations into the shedding of permanent incisor teeth by hill sheep. Res. vet. Sci. 3, 416–28.
Cresswell, E., Benzie, D. & Boyne, A. W. (1964). Studies of the dentition of sheep. IX. A further study of the mineralization of the skeleton of ewes on two Scottish hill farms. J. agric. Sci., Camb. 63, 387–91.
Duckworth, J., Hill, R.Benzie, D., Dalgarno, A. C. & Robinson, J. F. (1962). Studies of the dentition of sheep. I. Clinical observations from investigations into the shedding of permanent incisor teeth by hill sheep. Res. vet. Sci. 3, 1–17.
Field, A. C., Suttle, N. F. & Gunn, R. G. (1968). Seasonal changes in the composition and mineral content of the body of hill ewes. J. agric. Sci., Camb. 71, 303–10.
Jones, D. N. (1958). Rep. Hill Farm. Res. Org. 1st report, 1954–1958.
McRoberts, M. R., Hill, R. & Dalgarno, A.C. (1965 a). The effects of diets deficient in phosphorus, phosphorus and vitamin D, or calcium, on the skeleton and teeth of the growing sheep. I. The mineral status of the skeleton and clinical appearance of the teeth. J. agric. Sci., Camb. 65, 1–10.
McRoberts, M. R., Hill, R. & Dalgarno, A. C. (1965 b). II. Ibid. Maloeclusion of the teeth. J. agric. Sci., Camb. 65, 11–14.
National Academy of Sciences—National Research Council (U.S.) (1957). Nutrient Requirements of Domestic Animals. No. 5. Nutrient Requirements of Sheep. Publ. no. 504. Washington, D.C.
Nicholson, I. A. & Robertson, R. A. (1958). Some observations on the ecology of an upland grazing in north-east Scotland with special reference to Callunetum. J. Ecol. 46, 239–70.
Rawes, M. (1963). The productivity of a Festuca/ Agrostris alluvial grassland at 1700 ft. in the northern Pennines. J. Br. Grassl. Soc. 18, 300–9.
Robertson, R. A. & Davies, G. E. (1965). Quantities of plant nutrients in heather ecosystems. J. appl. Ecol. 2, 211–19.
Thomas, B., Escritt, J. R. & Trinder, N. (1945). The minor elements of common heather (Cuttuna vulgaris). Emp. J. Exp. Agric. 13, 93–9.
Underwood, E. J. (1966). The Mineral Nutrition of Livestock. F.A.O. Commonwealth Agricultural Bureau.
Whitehead, D. C. (1966). Nutrient Minerals in Grassland Herbage. Mimeographed publ. no. 1. Commonwealth Agricultural Bureau.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

The Journal of Agricultural Science
  • ISSN: 0021-8596
  • EISSN: 1469-5146
  • URL: /core/journals/journal-of-agricultural-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *

CAPTCHA *

Skip to the audio challenge
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 3 *
Loading metrics...

Abstract views

Total abstract views: 69 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 12th June 2018. This data will be updated every 24 hours.

Cancel
Confirm
×