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Energy cost of eating in cattle given diets of different form

Published online by Cambridge University Press:  02 September 2010

I. Adam ,
B. A. Young ,
A. M. Nicol  and
A. A. Degen
I. Adam
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
B. A. Young
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
A. M. Nicol
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
A. A. Degen
Affiliation:
Department of Animal Science, University of Alberta, Edmonton, Alberta T6G 2P5, Canada
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Abstract

1. Energy costs of eating were determined from the increased rates of oxygen uptake by five steers aged 18 to 20 months and weighing 298 to 407 kg.

2. Five diets were tested: pelleted concentrate (500 g barley grain per kg, 400 g lucerne meal per kg, 90 g soya bean meal per kg, and 10 g NaCl, trace mineral and vitamin supplement per kg); pelleted lucerne; lucerne hay; chopped-grass hay (700 g brome per kg, 300 g fescue per kg); and chopped fresh turnips. The dry-matter concentration of the pellets and hays was approximately 900 g per kg while the turnips contained only 140 g per kg.

3. The rates of ingestion differed markedly between diets during the (15 to 50 min) twice-daily (morning and evening) feeding periods. On a dry-matter basis, the pellets were consumed most rapidly at a rate of 130 to 138 g per min, while the hays were consumed at approximately 38 g per min and the turnips at 30 g per min.

4. The energy costs per min spent eating were similar for all rations (27·6 to 35·6 J/ kg live weight). However, because of different rates of ingestion, the energy costs per kg DM ingested were different: 222 to 238 J/kg live weight for the pelleted foods, 1029 J/kg live weight for the hays and 1427 J/kg live weight for the turnips.

5. The energy cost of eating is more a function of time spent eating than a function of the amount of food ingested. Thus, rate of ingestion and duration of the meal are key factors in determining the energy cost of eating in cattle.

Type
Research Article
Information
Animal Production , Volume 38 , Issue 1 , February 1984 , pp. 53 - 56
Copyright
Copyright © British Society of Animal Science 1984

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References

REFERENCES

Graham, N. McC. 1964. Energy cost of feeding activities and energy expenditure of grazing sheep. Aust. J. agric. Res. 15: 969–973.Google Scholar
Holmes, C. W., McLean, N. A. and Lockyer, K. J. 1978. Changes in the rate of heat production of calves during grazing and eating. N.Z. J. agric. Res. 21: 107–112.CrossRefGoogle Scholar
Holmes, C. W., Stephens, D. B. and Toner, J. N. 1976. Heart rate as a possible indicator of the energy metabolism of calves kept out-of-doors. Livestock Prod. Sci. 3: 333–341.CrossRefGoogle Scholar
Khrenov, I. I. 1957. The feeding reflex in cattle. Fiziol. zh. SSSR 43: 894–900.Google Scholar
McLean, J. A. 1972. On the calculation of heat production from open-circuit calorimetric measurements. Br. J.. Nutr. 27: 597–600.Google Scholar
National Research Council. 1976. Nutrient Requirements of Domestic Animals. No. 4, Nutrient Requirements of Beef Cattle. 5th ed. National Academy of Sciences, Washington, DC.Google Scholar
Osuji, P. O. 1974. The physiology of eating and the energy expenditure of the ruminant at pasture. J. Range Mgmt 27: 437–443.CrossRefGoogle Scholar
Osuji, P. O., Gordon, J. G. and Webster, A. J. F. 1975. Energy exchanges associated with eating and rumination in sheep given grass diets of different physical forms. Br. J. Nutr. 34: 59–71.CrossRefGoogle ScholarPubMed
Ustjanzew, W. 1911. The energy cost of ingestion by sheep. Biochem. Z. 37: 475.Google Scholar
Young, B. A. 1966. Energy expenditure and respiratory activity of sheep during feeding. Aust. J. agric. Res. 17: 355–362.Google Scholar
Young, B. A., Kerrigan, B. and Christopherson, R. J. 1975. A versatile respiratory pattern analyzer for studies of energy metabolism of livestock. Can. J. Anim. Sci. 55: 17–22.Google Scholar