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Artificial rearing of pigs

12. Effect of replacement of dried skim-milk by either a soya-protein isolate or concentrate on the performance of the pigs and digestion of protein

Published online by Cambridge University Press:  09 March 2007

M. J. Newport  and
H. D. Keal
M. J. Newport
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, RG2 9AT
H. D. Keal
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, RG2 9AT
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Abstract

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1. Pigs (sixteen/diet) were weaned at 2 d of age and given liquid diets (200 g dry matter/1) during a 26 d experiment. The pigs were fed on a scale based on live weight. Dried skim-milk was the only source of protein in diet U and was partially or totally replaced by a soya-bean isolate (diet B) or a concentrate (diets C and D). Soya-bean protein provided 500, 700 or 350g/kg total crude protein (nitrogen × 6·25) in diets B, C and D respectively.

2. Performance was similar for diets B and D, but poorer than that of pigs given diet U. The apparent digestibility and retention of N of these diets was similar. Pigs given diet C scoured severely and twelve died.

3. Protein digestion was studied in pigs given diets U, B and D, killed at 28 d of age, at the termination of the feeding experiment. The dry matter content and proportion of N in the digesta in the stomach were reduced in pigs given soya-bean protein. Pepsin concentrations in digesta and stomach tissue were unchanged.

4. The concentrations of trypsin and chymotrypsin in the pancreas were greater in pigs given the soya-bean protein concentrate compared with milk protein, but only the increase in trypsin was significant (P < 0·01). Digesta from the small intestine of pigs given the soya-bean-protein isolate contained less chymotrypsin (P < 0·05). There were no differences in the proportion of non-protein-N in the total N in the digesta, suggesting that proteolysis of the milk and soya-bean proteins were equally efficient by 28 d of age.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 48 , Issue 1 , July 1982 , pp. 89 - 96
Copyright
Copyright © The Nutrition Society 1982

References

REFERENCES

Anson, M. L. (1938). J. gen. Physiol. 22, 79.CrossRefGoogle Scholar
Aumaitre, A. (1972). Wld Rev. Anim. Prod. 8, 54.Google Scholar
Braude, R., Keal, H. D. & Newport, M. J. (1976). Br. J. Nutr. 35, 253.CrossRefGoogle Scholar
Braude, R., Mitchell, K. G., Newport, M. J. & Porter, J. W. G. (1970). Br. J. Nutr. 24, 501.CrossRefGoogle Scholar
Braude, R. & Newport, M. J. (1973). Br. J. Nutr. 29, 447.CrossRefGoogle Scholar
Cranwell, P. D., Noakes, D. E. & Hill, K. J. (1976). Br. J. Nutr. 36, 71.CrossRefGoogle Scholar
Cunningham, H. M. & Brisson, G. J. (1957). J. Anim. Sci. 16, 568.CrossRefGoogle Scholar
Hummel, B. C. W. (1959). Can. J. Biochem. Physiol. 37, 1393.CrossRefGoogle Scholar
Newport, M. J. (1980). Br. J. Nutr. 44, 171.CrossRefGoogle Scholar
Newport, M. J. & Keal, H. D. (1980). Br. J. Nutr. 44, 161.CrossRefGoogle Scholar
Sewell, R. F., Sheffy, B. E., Eggert, R. G. & Loosli, J. K. (1953). J. Anim. Sci. 12, 597.CrossRefGoogle Scholar
Smith, R. H. & Sissons, J. W. (1975). Br. J. Nutr. 33, 329.CrossRefGoogle Scholar
Smith, R. H., Sissons, J. W. & Hewitt, D. (1979). Br. J. Nutr. 42, 477.Google Scholar