Impact of Ambient Temperature and Dietary Crude Protein in Wethers: Nitrogen Metabolism and Feed Efficiency

Asian-Australasian Journal of Animal Sciences

Volumn 14, Issue 9, 2001, Pages 1221-1227

  Sun, Sangsoo ^a   Christopherson, Robert J ^a,b  

^a Chonnam National University   (South Korea)

^b UNIVERSITY OF ALBERTA   (Canada)

Author keywords

Cold; Feed efficiency; Nitrogen metabolism; Sheep

Indexed keywords

BROMUS; HORDEUM VULGARE SUBSP. VULGARE; OVIS ARIES;

EID: 0035637512     PISSN: 10112367     EISSN: None     Source Type: Journal    
DOI: 10.5713/ajas.2001.1221     Document Type: Article

References (36)

1. AOAC. 1980. Official Method of Analysis. Association of Official Analytical Chemists. Washington. D.C.
2. Baile, C. A. and J. M. Forbes. 1974. Control of feed intake and regulation of energy balance in ruminants. Physiol. Rev. 54:160-214.
3. Beever, D. E. and R. C. Siddons. 1986. Nutrition and metabolism in the grazing ruminant. pp. 479-497 in L. P. Milligan, W. L. Grovum and A. Dobson, eds. Control of digestion and metabolism in ruminants. Prentice-Hall, Englewood Cliffs, New Jersey.
4. 15N-nitrogen. J. Anim. Sci. 64:855-867.
5. Bunting, L. D., J. A. Boling and C. T. MacKown. 1989. Effect of dietary protein level on nitrogen metabolism in the growing bovine: Nitrogen recycling and intestinal protein supply in calves, J. Anim. Sci. 67:810-819.
6. Chai, K., P. M. Kennedy, L. P. Milligan and G. W. Mathison. 1985. Effect of cold exposure and plant species on forage intake, chewing behavior and digesta particle size in sheep. Can. J. Anim. Sci. 65:69-76.
7. Christopherson, R. J. 1976. Effects of prolonged cold and the outdoor winter environment on apparent digestibility in sheep and cattle. Can. J. Anim. Sci. 56:201-212
8. Christopherson, R. J. 1985. Management and housing of animals in cold environments. pp 175-194. in M. K. Yousef ed. Stress physiology in livestock II. Ungulates. CRC Press.
9. Davenport, G. M., J. A. Boling, N. Gay and L. D. Bunting. 1987. Effect of soybean lipid on growth and ruminal nitrogen metabolism in cattle fed soybean meal or ground whole soybeans. J. Anim. Sci. 65:1680-1689.
10. Dixon, R. M. and L. P. Milligan. 1984. Nitrogen kinetics in the large intestine of sheep given bromegrass pellets. Can J. Anim. Sci. 64:103-111.
11. Egan, A. R., K. Boda and J. Varady. 1986. Regulation of nitrogen metabolism and recycling. pp 386-402. in L. P. Milligan, W. L. Grovum and A. Dobson, Ed. Control of digestion and metabolism in ruminants. Prentice-Hall, Englewood Cliffs, New Jersey.
12. Egan, A. R. and M. J. Ulyatt. 1980. Quantitative digestion of fresh herbage by sheep. VI. Utilization of nitrogen five herbages. J. Agric. Sci. Camb. 74:47-56.
13. Gibb, M. J. and P. D. Penning. 1972. The effects of environmental temperature and feeding pattern on the performance of artificially-reared lambs fed cold milk substitute. Anim. Prod. 15:177-182.
14. Kelley, J. M. and R. J. Christopherson. 1989. The apparent digestibilities of dry matter, organic matter and nonammonia nitrogen in the forestomach, small intestine, and large intestine of wethers exposed to a cold environment. Can. J. Anim. Sci. 69:911-919
15. Kelley, J. M., R. J. Christopherson and R. J. Early. 1989. Apparent digestibility of amino acids and other nitrogenous compounds in the small intestine of wethers exposed to a cold environment. Can. J. Anim. Sci. 69:921-929
16. Kennedy, P. M. 1985. Influences of cold exposure on digestion of organic matter, rates of passage of digesta in the gastrointestinal tract, and feeding rumination behavior in sheep given four forage diets in the chopped, or ground and pelleted form. Br. J. Nutr. 53:159-173.
17. Kennedy, P. M. and L. P. Milligan. 1978. Effects of cold exposure on digestion, microbial synthesis and nitrogen transformation in sheep. Br. J. Nutr. 39:105-117.
18. Kennedy, P. M., R. J. Christopherson and L. P. Milligan. 1982. Effects of cold exposure on feed protein degradation, microbial protein synthesis and transfer of plasma urea to rumen of sheep. Br. J. Nutr. 47:521-535.
19. Kennedy, P. M., R. J. Christopherson and L. P. Milligan. 1986a. Digestive responses to cold. pp 285-306. in L. P. Milligan, W. L. Grovum and A. Dobson, eds. Control of digestion and metabolism in ruminants. Prentice-Hall, Englewood Cliffs, New Jersey.
20. Kennedy, P. M., R. J. Early, R. J. Christopherson and L. P. Milligan. 1986b. Nitrogen transformations and diets exposed to warm and cold ambient temperatures. Can. J. Anim. Sci. 66:951-957.
21. Kinser, A. R., G. C. Jr. Fahey, L. L. Berger and N. R. Merchen. 1988. Low-quality roughages in high-concentrate pelleted diets for sheep: digestion and metabolism of nitrogen and energy as affected by dietary fiber concentration. J. Anim. Sci. 66:487-500.
22. Maynard, L. A. and J. K. Loosli. 1962. Animal Nutrition. McGraw-Hill Book Co., Inc. N.Y.
23. McBride, G. E. and R. J. Christopherson. 1984a. Effects of cold exposure on milk production and energy balance in the lactating ewe. Can. J. Anim. Sci. 64:379-389.
24. McBride, G. E. and R. J. Christopherson. 1984b. Effects of cold exposure on young growing lambs. Can. J. Anim. Sci. 64:403-410.
25. Minson, D. J. and J. H. Ternouth. 1971. The expected and observed changes in the intake of three hays by sheep after shearing. Br. J. Nutr. 26:31-39.
26. Moose, M. G., C. V. Ross and W. H. Pfander. 1970. Nutritional and environmental relationships with lambs. J. Anim. Sci. 29:619-627.
27. Mousa, H. M., K. E. Ali and I. D. Hume. 1983. Effects of water deprivation on urea metabolism in camels, desert sheep and desert goats fed dry desert grass. Comp. Biochem. Physiol. 74A:715-720.
28. NRC. 1985. Nutrient requirements of sheep. NAS-NRC, Washington, D. C.
29. Norton, B. W., J. B. Mackintosh and D. G. Armstrong. 1982. Urea synthesis and degradation in sheep given pelleted-grass diets containing flaked barley. Br. J. Nutr. 48:249-264.
30. Orskov, E. R. and N. A. MacLeod. 1986. Flow of endogenous N from the rumen and abomasum of cattle given protein-free nutrients. Proc. Nutr. Soc. 42:61A.
31. Steel, R. G. D. and J. H. Torrie. 1980. Principles and Procedures of Statistics. McGraw-Hall Book Company. N. Y.
32. Webster, A. J. F. 1974. Adaptation to cold, in D. Robertshaw ed. M. T. P. Int. Rev. Sci. Environ. Physiol. Butterworths, London.
33. Webster, A. J. F., J. Chlumecky and B. A. Young. 1970. Effects of cold environments on the energy exchanges of young beef cattle. Can. J. Anim. Sci. 50:89-100.
34. Wellard, G. A. and I. D. Hume. 1981. Digestion and digesta passage in the brushtail possum, Trichosurus vulpecula (Kerr.). Aust. J. Zool. 29:157-166.
35. Williams, P. E. V. and G. M. Innes. 1982. Effects of short term cold exposure on the digestion of milk replacer by young preruminant calves. Res. Vet. Sci. 32:383-386.
36. Young, B. A. 1981. Cold stress as it affects animal production. J. Anim. Sci. 52:154-163.