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Effects in bacon pigs of differing levels of nutrition to 20 kg. body weight

Published online by Cambridge University Press:  02 September 2010

Henning E. Nielsen
Henning E. Nielsen
Affiliation:
National Research Institute of Animal Husbandry, Copenhagen, Denmark
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Extract

Sixteen blocks of eight littermate pigs were weaned at 3 weeks of age and each divided into four groups. Various levels of nutrition were applied to the pigs so that the four groups reached 20 kg. at 59, 68, 80 and 91 days of age, respectively.

Only small differences were observed between groups in feed conversion ratio to 20 kg.; however, Group 4 required more feed per kg. gain than the three other groups.

During the second period (20–90 kg.) the pigs in each group were divided into two sub-groups, which were on a high and a low plane of nutrition respectively. In both sub-groups the type of feeding before 20 kg. influenced the average daily gain and feed conversion ratio. The older the pigs were at 20 kg. the higher the daily gain and the lower the feed conversion ratio in the following period. There was an increase in daily feed intake with increased age at 20 kg. for pigs fed ad lib. during the second period.

An increase in age at 20 kg. caused a significant decrease in thickness of backfat, a greater area of eye muscle and a smaller area of fat overlying muscle. For pigs fed ad lib. the area of eye muscle was significantly increased by a higher age at 20 kg. live-weight.

Type
Research Article
Information
Animal Production , Volume 6 , Issue 3 , October 1964 , pp. 301 - 308
Copyright
Copyright © British Society of Animal Science 1964

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References

REFERENCES

Boaz, T. G. & Elsley, F. W. H., 1962. The growth and carcass quality of bacon pigs reared to different weights at 56 days old. Anim. Prod., 4: 13.Google Scholar
Clausen, Hj., 1960. Bilag til De samvirkende danske Andels-Svineslagteriers delegeretmøde. (Unpublished report of the Landøkonomisk Forsøgslaboratorium, Copenhagen.)Google Scholar
Clausen, Hj. & Nielsen, H. E., 1961. Foderstyrkens indflydelse pa vaeksthastighed foderforbrug og slagtekvalitet. (Unpublished report of the Landøkonomisk Forsøgslaboratorium, Copenhagen.)Google Scholar
Clausen, Hj. & Nørtoft Thomsen, R., 1959. 47. beretning om sammenlignende forsøg med svin. Landøkonomisk Forsøgslaboratorium, Copenhagen.Google Scholar
Clausen, Hj., Nørtoft Thomsen, R. & Pedersen, O. K., 1963. 51. beretning om sammenlignende forsøg med svin. Landøkonomisk Forsøgslaboratorium, Copenhagen.Google Scholar
Elsley, F. W. H., 1963. Studies of growth and development in the young pig. Part I. The carcass composition at 56 days of age of pigs reared along different growth curves. Part II. A comparison of the performance to 200 lbs. of pigs reared along different growth curves to 56 days of age. J. agric. Sci., 61: 233, 243.CrossRefGoogle Scholar
Frape, D. L., Hays, V. W., Speer, V. C., Jones, J. D. & Catron, D. V., 1959. The effect of varied feed intake to 8 weeks of age on growth and development of pigs to 200 pounds body weight. J. Anim. Sci., 18: 1492.Google Scholar
Lucas, I. A. M., Calder, A. F. C. & Smith, H., 1959. The early weaning of pigs VI. The effects of early weaning and various growth curves before 50 lb. live weight on subsequent performance and carcass quality. J. agric. Sci., 53: 136.Google Scholar
McMeekan, C. P., 1940a. Growth and development in the pig, with special reference to carcass quality characters. II. The influence of the plane of nutrition on growth and development. J. agric. Sci., 30: 387.CrossRefGoogle Scholar
McMeekan, C. P. 1940b. Growth and development in the pig, with special reference to carcass characters. III. Effect of plane of nutrition on the form and composition of the bacon pigs. J. agric. Sci., 30: 511.CrossRefGoogle Scholar
Snedecor, G. W., 1956. Statistical Methods. Iowa State College Press, Ames, Ia.Google Scholar