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The nutritive value of separated milk for pigs: II. The effects of different amounts on performance to 90 kg live weight

Published online by Cambridge University Press:  02 September 2010

A. G. Chamberlain  and
B. C. Cooke
A. G. Chamberlain
Affiliation:
Department of Agriculture, University College of North Wales, Bangor
B. C. Cooke
Affiliation:
Department of Agriculture, University College of North Wales, Bangor
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Summary

Each of seven diets containing different proportions of separated milk and barley meal, supplemented with minerals and vitamins, was given to five groups of four pigs. The ratios of barley to milk solids were such that the crude protein of the dry matter given to pigs of 20 to 40 kg live weight ranged from approximately 15 to 21%. Within each treatment, the proportion of milk was gradually adjusted so that the crude protein level was reduced by 3% over the live-weight range 40 to 91 kg. Daily energy allowances of all pigs were governed by the same scale.

The total dry matter consumed by the pigs had mean total lysine levels of from 0·52 to 1·18% (approximately 0·1% lysine between successive treatments).

Pigs on the lowest level of milk grew more slowly and had poorer feed conversion than other animals.

Percentage dissectable lean in the trimmed side was highly correlated with lysine level. Within the range studied, each 0·1% increase in lysine increased lean by 0·69% and caused decreases in fat thickness. The performance of the milk-fed pigs was compared to controls given a standard all-meal diet.

Nitrogen metabolism trials were carried out on the milk diets. Beneficial responses in terms of nitrogen retention were found up to the highest level of milk given to pigs between 16 and 90 kg live weight.

Type
Research Article
Information
Animal Production , Volume 12 , Issue 1 , February 1970 , pp. 125 - 137
Copyright
Copyright © British Society of Animal Science 1970

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References

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