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The nutrition of the early weaned lamb. IV. Effects on growth rate, food utilization and body composition of changing from a low to a high protein diet

Published online by Cambridge University Press:  27 March 2009

E. R. Ørskov ,
I. McDonald ,
D. A. Grubb  and
K. Pennie
E. R. Ørskov
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen, AB2 QSB
I. McDonald
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen, AB2 QSB
D. A. Grubb
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen, AB2 QSB
K. Pennie
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen, AB2 QSB
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Summary

About sixty male lambs were fed ad libitum from 6 weeks of age on low- or highprotein diets based on barley or barley and fishmeal and containing respectively 120 and 200 g crude protein/kg dry matter. Some lambs were changed from one diet to the other when they reached 28 kg live weight. All were slaughtered as they attained a predetermined series of live weights ranging from 20 to 75 kg.

Throughout the experiment, rates of live-weight gain were substantially higher with the high-protein (HP) than with the low-protein (LP) diet, but were highest after a change from low to high protein (LHP). The feed consumption of the LHP lambs did not exceed that of the HP lambs, but the former showed a substantial superiority in feed conversion ratio at the same live weight.

At similar empty body weights, the LP lambs contained more fat and less water in the empty body than the HP lambs. Although the percentage differences decreased at higher weights, differences were still apparent at 70 kg live weight.

The LHP lambs showed dramatic and rapid changes in body composition, particularly in water and fat content. By 40 kg live weight, their composition approached that of the HP lambs.

The ratio of water to protein was consistently lower for the LP lambs. The ratio of protein to ash also differed between LP and HP lambs. It was initially highest for the HP lambs, at about 40 kg live weight it was the same, and at 70 kg live weight it was highest for the LP lambs.

The ash content of the LHP lambs remained virtually constant during the period of rapid growth and rapid deposition of water, protein and fat which took place immediately after the change of diet, and only showed compensatory increases after 35 kg live weight. This finding was supported by the pattern of changes in weight and specific gravity of the femur and tibia + fibula.

Use was made of separate relationships between live weight and body composition for the LP, HP and LHP lambs to estimate rates of accretion of crude protein, fat and water in the empty body. There was a particularly striking increase in the rate of accretion of water immediately following the change of diet. There was an increase in the water content of empty-body gain and a reduction in the ratio of gain in fat to gain in protein.

Derived estimates of the ratio of metabolizable energy intake above maintenance to the energy content of empty-body gain gave some suggestion of an improvement in efficiency of utilization of metabolizable energy for gain following the change from low to high protein. It is concluded however that the improvement in food conversion ratio following the change is attributable mostly to difference in the composition of gain.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 86 , Issue 2 , April 1976 , pp. 411 - 423
Copyright
Copyright © Cambridge University Press 1976

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References

Allden, W. G. (1970). The effects of nutritional deprivation on subsequent productivity of sheep and cattle. Nutrition Abstracts and Reviews 40, 1167–84.Google ScholarPubMed
Andrews, R. P. & Ørskov, E. K. (1970 a). The nutrition of the early weaned lamb. I. The influence of protein concentration and feeding level on rate of gain in body weight. Journal of Agricultural Science, Cambridge 75, 11–18.CrossRefGoogle Scholar
Andrews, R. P. & Ørskov, E. R. (1970 b). The nutrition of the early weaned lamb. II. The effect of dietary protein concentrations, feeding level and sex on body composition at two live weights. Journal of Agricultural Science, Cambridge 75, 19–26.CrossRefGoogle Scholar
Atkinson, T., Fowler, V. R., Garton, G. A. & Lough, A. K. (1972). A rapid method for the accurate determination of lipid in animal tissue. Analyst, London 97, 562–8.Google Scholar
Burton, J. H., Anderson, M. & Eeid, J. T. (1974). Some biological aspects of partial starvation. The effect of weight loss and regrowth on body composition in sheep. British Journal of Nutrition 32, 515–27.CrossRefGoogle ScholarPubMed
Davidson, J., Mathieson, J. & Boyne, A. W. (1970). The use of automation in determining nitrogen by the Kjeldahl method, with final calculations by computer. Analyst, London 95, 181–93.CrossRefGoogle ScholarPubMed
Fox, D. G., Johnson, R. R., Preston, R. L., Docherty, T. R. & Klosterman, E. W. (1972). Protein and energy utilization during compensatory growth in beef cattle. Journal of Animal Science 34, 310–18.Google Scholar
Horie, Y. & Ashida, K. (1973). Effect of an adequate protein diet after a low protein diet on protein oatabolism in growing rats. British Journal of Nutrition 29, 23–31.CrossRefGoogle ScholarPubMed
Houseman, R. A. & McDonald, I. (1973). The prediction of body composition in bacon pigs from measurements of feed intake and live weight gain. Animal Production 17, 295–304.Google Scholar
Kielanowski, J. & Kotarbinska, M. (1970). Further studies on energy metabolism in pigs. In Energy Metabolism of Farm Animals (ed. Schurch, A. and Wenk, C.). Zurich: Juris Druck+Verlag.Google Scholar
Ørskov, E. R. & McDonald, I. (1970). The utilization of dietary energy for maintenance and for fat and protein deposition in young growing sheep. In Energy Metabolism of Farm Animals (ed. Schurch, A. and Wenk, C.). Zurich: Juris Druck+Verlag.Google Scholar
Ørskov, E. R., McDonald, I., Fraser, C. & Corse, E. L. (1971). The nutrition of the early weaned lamb. III. The effect of ad libitum intake of diets varying in protein concentration on performance and on body composition at different live weights. Journal of Agricultural Science, Cambridge 77, 351–61.Google Scholar
Oslage, H. J., Gadeken, D. & Fliegel, H. (1970). Uber den energetischen Wirkungsgrad der Proteinund Fettsynthese bei wachsenten Schweinen. In Energy Metabolism of Farm Animals (ed. Schurch, A. and Wenk, C.). Zurich: Juris Druek+Verlag.Google Scholar
Pond, W. G., Van Vleck, L. D., Walker, E. F., Eisenhard, C. F. & O'Connor, J. R. (1969). Changes in body weight and composition of adult non-gravid female rats deprived of dietary protein. Journal of Nutrition 97, 3431–7.Google Scholar
Reid, J. T., Bensadoun, A., Bull, L. S., Burton, J. J., Gleeson, P. H., Han, L. K., Joo, Y. D., Johnson, D. E., McManus, W. R., Paladines, O. L., Stroud, J. W., Tyrrell, H. F., Van Niekirk, B. D. H., Wellington, G. H. & Wood, J. D. (1968). Changes in body composition and meat characteristics accompanying growth of animals. Proceedings of the Cornell Nutrition Conference, pp. 18–27.Google Scholar
Stainer, M. H. (1957). Effect of protein deficiency and subsequent refeeding on body composition of adult rats. British Journal of Nutrition 11, 206–12.Google Scholar
Thorbek, G. (1970). The utilization of metabolizable energy for protein and fat gain in growing pigs. In Energy Metabolism of Farm Animals (ed. Schurch, A. and Wenk, C.). Zurich: Juris Druck+Verlag.Google Scholar
Widdowson, E. M. & McCance, R. A. (1957). Effects of a low protein diet on the chemical composition of the bodies and tissues of young rats. British Journal of Nutrition 11, 198–205.CrossRefGoogle ScholarPubMed
Wilson, P. N. & Osbourn, D. F. (1960). Compensatory growth after undernutrition in mammals and birds. Biological Reviews 35, 324–63.CrossRefGoogle ScholarPubMed
Zimmerman, D. R. & Khajarern, S. (1973). Starter protein nutrition and compensatory responses in swine. Journal of Animal Science 36, 189–94.CrossRefGoogle Scholar