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Estimates of the energy required for maintenance by adult sheep 2. Grazing sheep

Published online by Cambridge University Press:  02 September 2010

J. P. Langlands ,
J. L. Corbett ,
I. McDonald  and
G. W. Reid
J. P. Langlands
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
J. L. Corbett
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
I. McDonald
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
G. W. Reid
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen
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Summary

The mean daily digestible organic matter intake (D) of each of 47 adult sheep during a grazing period of mean length 48 days was estimated by the chromium sesquioxide/faecal nitrogen technique. Mean live-weights (W) and mean daily weight gains (G) were also measured.

The regression of D on W and G, and the underlying or functional relationship between D, W and G were both estimated. From the underlying relationship, the preferred equation, the maintenance requirement of a 100 lb. sheep at pasture is estimated to be 1·02 lb. digestible organic matter daily. This value is 24% higher than the corresponding value for housed sheep obtained previously by us.

This result is compared with other estimates of the energy cost of grazing and it is concluded that further work is needed in order to define those circumstances which elevate the maintenance requirements of grazing animals.

Type
Research Article
Information
Animal Production , Volume 5 , Issue 1 , February 1963 , pp. 11 - 16
Copyright
Copyright © British Society of Animal Science 1963

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References

REFERENCES

Blaxter, K. L., 1958. In Scientific Principles of Feeding Farm Livestock, p. 21. Fanner & Stockbreeder, London.Google Scholar
Blaxter, K. L., 1960. The utilization of the energy of grassland products. Proc. VIIIth int. Grassl. Congr., p. 479.Google Scholar
Blaxter, K. L., 1961. The utilization of the energy of feed by ruminants. Proc. 2nd Symposium on Energy Metabolism. Europ. Assoc. Anim. Prod, (in the press).Google Scholar
Christian, K. R. & Coup, M. R., 1954. Measurement of feed intake by grazing cattle and sheep. 6. The determination of chromic oxide in faeces. N.Z.J. Sci. Tech., 36 (A): 328.Google Scholar
Clapperton, J. L., 1961. The energy expenditure of sheep in walking on the level and on gradients. Proc. Nutr. Soc, 20: xxxi.Google Scholar
Commonwealth Bureau of Pastures and Field Crops, 1961. Research Techniques in use at the Grassland Research Institute, Hurley. Bull. 45 by members of the Institute Staff. Commonwealth Agricultural Bureaux, Farnham Royal, Bucks.Google Scholar
Coop, I. E., 1962. The energy requirements of sheep for maintenance and gain. I Pen fed sheep. J. agric. Sci., 58: 179.CrossRefGoogle Scholar
Coop, I. E. & Hill, M. K., 1962. The energy requirements of sheep for maintenance and gain. II Grazing sheep. J. agric. Sci., 58: 187.Google Scholar
Corbett, J. L., 1960. Faecal-index techniques for estimating herbage consumption by grazing animals. Proc. VIIIth int. Grassl. Congr., p. 438.Google Scholar
Corbett, J. L., Greenhalgh, J. F. D., McDonald, I. & Florence, E., 1960. Excretion of chromium sesquioxide administered as a component of paper to sheep. Brit. J. Nutr., 14: 289.CrossRefGoogle Scholar
Corbett, J. L., Langlands, J. P. & Boyne, A. W., 1961. An estimate of the energy expended for maintenance by strip-grazed dairy cows. Proc. VIIIth int. Congr. Anim. Prod., III: 245.Google Scholar
Greenall, A. F., 1959. Studies of grazing of crop forages by sheep. III. Intake, maintenance, and weight-gain requirements of wethers grazing rape. N.Z. J. agric. Res., 2: 639.Google Scholar
Greenhalgh, J. F. D., Corbett, J. L. & McDonald, I., 1960. The indirect estimation of the digestibility of pasture herbage. II. Regressions of digestibility on faecal nitrogen concentration; their determination in continuous digestibility trials and the effect of various factors on their accuracy. J. agric. Sci., 55: 377.CrossRefGoogle Scholar
Lambourne, L. J., 1961. Relative effects of environment and live weight upon the feed requirements of sheep. Proc. N.Z. Soc. Anim. Prod., 21: 92.Google Scholar
Langlands, J. P., 1962. Energy intake and its utilisation for maintenance by the intensively grazed ruminant. Ph.D. thesis, University of Aberdeen.Google Scholar
Langlands, J. P., Corbett, J. L., McDonald, I. & Pullar, J. D., 1963a. Estimates of the energy required for maintenance by adult sheep. I. Housed sheep. Anim. Prod., 5: 1.Google Scholar
Langlands, J. P., Corbett, J. L., McDonald, I. & Reid, G. W., 1963b. Estimation of the faeces output of grazing animals from the concentration of chromium sesquioxide in a faeces sample. 2. Comparison of estimates from samples taken at fixed times of day with estimates from samples collected from the sward. Brit. J. Nutr. (in the press).Google Scholar
Reid, J. T., Smith, A. M. & Anderson, M. J., 1958. Difference in the requirements for maintenance of dairy cattle between pasture- and barn-feeding conditions. Proc. Cornell Nutr. Conf. Feed Manuf., p. 88.Google Scholar
Wallace, L. R., 1956. The intake and utilisation of pasture by grazing dairy cattle. Proc. VIIth int. Grassl. Congr., p. 134.Google Scholar