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The effects of varying the dietary calorie: protein ratios on the performance characteristics and carcass quality of growing pigs in the tropics

Published online by Cambridge University Press:  02 September 2010

G. M. Babatunde ,
B. L. Fetuga  and
V. A. Oyenuga
G. M. Babatunde
Affiliation:
Department of Animal Science, University of Ibadan, Ibadan, Nigeria
B. L. Fetuga
Affiliation:
Department of Animal Science, University of Ibadan, Ibadan, Nigeria
V. A. Oyenuga
Affiliation:
Department of Animal Science, University of Ibadan, Ibadan, Nigeria
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Summary

Two trials were carried out to investigate the effects of increasing calorie: protein (C:P) ratios of high iso-nitrogenous diets on the performance characteristics, nutrient digestibility, carcass quality and organ weights of 67 growing pigs of the Yorkshire and Landrace breeds, reared in a tropical environment on concrete-floored pens from 9 to 56-8 kg live weight before slaughtering and grading. The dietary protein content was approximately 24 % of dry matter in all cases, and the C:P ratios ranged from 153 to 184 kcal digestible energy/g in both trials. Results showed no consistently significant differences in gain and feed intake due to increasing C:P ratio, but feed conversion ratios consistently improved with increasing C:P ratio. Digestible energy consumed per kg of body weight gained also increased with increasing C:P ratio. The nutrient digestion coefficients did not appear to be significantly affected by the C:P ratio. With respect to carcass quality measurements, there were nonsignificant differences in dressing percentage and average backfat measurements, but significant differences in percentage trimmed fat with increase in C:P ratio. The carcass length, loin eye area, and percentage lean cuts decreased as the C:P ratios increased, the last two showing significant differences only in the second trial. The organ weights showed no significant differences due to increases in C:P ratio.

Type
Research Article
Information
Animal Production , Volume 13 , Issue 4 , November 1971 , pp. 695 - 702
Copyright
Copyright © British Society of Animal Science 1971

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References

REFERENCES

Abernathy, R. P., Sewell, R. F. and Tarpley, R. L. 1958. Interrelationships of protein, lysine and energy in diets of growing swine. J. Anim. Sci. 17: 635–639.Google Scholar
Anderson, G. C., Day, B. N. and Lewis, W. R. 1957. The value of inedible animal fats in pig rations. Bull. IV. Virginia agric. Exp. Stn, No. 399.Google Scholar
Association of Official Agricultural Chemists. 1960. Official Methods of Analysis (9th Ed.). Association of Official Agricultural Chemists, Washington D.C.Google Scholar
Asplund, J. M., Grummer, R. H. and Phillips, P. H. 1960. Stabilized white grease and corn oil in the diets of baby pigs. J. Anim. Sci. 19: 709–714.CrossRefGoogle Scholar
Baird, D. M., Campbell, H. C. and Neville, W. E. 1958. The performance and carcass characteristics of growing-fattening swine as affected by ration levels of protein and inedible fats. J. Anim. Sci. 17: 1165 (Abstr.).Google Scholar
Bowland, J. P. and Berg, R. J. 1959. Influence of strain and sex on the relationships of protein to energy in the rations of growing-finishing pigs. Can. J. Anim. Sci. 39:102–114.CrossRefGoogle Scholar
Clawson, A. J., Blummer, T. N., Smith, F. H. and Barrick, E. R. 1959. The influence of energy-protein ratio in the ration on performance, ration digestibility and carcass characteristics of swine. J. Anim. Sci. 18: 1492 (Abstr.).Google Scholar
Greeley, M. G., Meade, R. J. and 1964a. Energy and protein intakes by growing swine. I. Effects on rate and efficiency of gains and on nutrient digestibility. J. Anim. Sci. 23: 808–815.CrossRefGoogle Scholar
Greeley, M. G., Meade, R. J., Hanson, L. E. and Nordstrom, J. N. 1964b. Energy and protein intakes by growing swine. II. Effects on rate and efficiency of gain and carcass characteristics. J. Anim. Sci. 23: 816–822.CrossRefGoogle Scholar
Heitman, H. 1956. Use of stabilized tallow in swine rations. J. Anim. Sci. 15:1046–1051.CrossRefGoogle Scholar
Kennington, H. M., Perry, T. W. and Beeson, W. M. 1958. Effects of adding animal fat to swine rations. J. Anim. Sci. 17: 1166 (Abstr.).Google Scholar
Kropf, D. H., and Wallace, H. D. 1954. Observations on the use of waste beef tallow in swine rations. J. Anim. Sci. 13: 630–637.Google Scholar
Kuryvial, M. S., Bowland, J. P. and Berg, R. T. 1962. Supplemental fat as an energy source in the diets of swine and rats. I. Food and energy utilization. Can. J. Anim. Sci. 42: 23–32.Google Scholar
Kuryvial, M. S. and BOwland, J. P. 1962. Supplemental fat as an energy source in the diets of swine and rats. II. Energy and nitrogen digestibility, nitrogen retention and carcass fat composition. Can. J. Anim. Sci. 42: 33–40.Google Scholar
Likuski, H. J. A., Bowland, J. P. and Berg, R. T. 1961. Energy digestibility and nitrogenretention by pigs and rats fed diets containing non-nutritive diluents and varying protein levels. Can. J. Anim. Sci. 41: 89–101.Google Scholar
Lowrey, R. S., Pond, W. G. and Maner, J. H. 1958. The effect of calorie: protein ratio on digestibility, feed efficiency and weight gain in growing swine. J. Anim. Sci. 17: 1165.Google Scholar
Lowrey, R. S., Pond, W. G., Loosli, J. K. and Maner, J. H. 1962. Effect of dietary fat level on apparent nutrient digestibility by growing swine. Anim. Sci. 21: 746–750.CrossRefGoogle Scholar
Mitchell, H. H. and Hamilton, T. S. 1935. The balancing of rations with respect to protein. Proc. Amer. Soc. Anim. Prod. 28, 241–252.Google Scholar
Morrison, F. B. 1959. Feeds and Feeding (22nd ed.). Morrison Publishing Co, Clinton, la.Google Scholar
National Research Council. 1964. Nutrient Requirements of Domestic Animals. Recommended Nutrient Allowances for Swine. National Academy of Sciences—National Research Council Pub. No. 1192.Google Scholar
Perry, T. W., Beeson, W. M. and 1953. Adding animal fats to swine rations. Mimeo. Rep. Purdue agric. Exp. Stn., No. 116.Google Scholar
Pond, W. G., Kwong, E. and Loosli, J. K. 1960. Effect of level of dietary fat, pantothenic acid, and protein on performance of growing-fattening pigs. J. Anim. Sci. 19:1115–1122.Google Scholar
Steel, G. D. and Torrie, J. H. 1960. Principles and Procedures of Statistics. McGraw-Hill Book Company, Inc., New York, Toronto and London.Google Scholar