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Growth of pigs fed cool whey at two ambient temperatures

  • C. W. Holmes (a1)

Summary

1. Two experiments have been performed to compare the performance of pigs given cool ‘whey’ (15°C) with that of pigs fed warm ‘whey’ (40°C). Pigs were penned individually and the ‘whey’ was reconstituted from concentrated materials.

2. In both experiments pigs offered cool ‘whey’ grew at a slower rate and required more dry matter/kg live-weight gain than pigs offered warm ‘whey’; the differences in rate of gain were 11 % at 16°C air temperature in Experiment 1 and 5% at 22°C air temperature in Experiment 2.

3. It was estimated that the ‘heat of warming’ for the cool ‘whey’ might have accounted for its entire effect on rate of gain.

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References

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Carr, J. R. and Dunkin, A. C. 1969. Protein supplementation of rations based on whey for growing pigs. 1. Rate of gain, efficiency of food utilisation, and carcass quality. N.Z. Jl agric. Ses. 12: 519532.
Dunkin, A. C. 1958. The use of condensed whey as a food for fattening pigs. N.Z. Jl agric. Res. 1: 531539.
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Forbes, T. J. and Walker, N. 1969. The utilization of wet feed by bacon pigs with special reference to pipe-line feeding. J. agric. Sci., Camb. 71: 145151.
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Holmes, C. W. 1968. Heat losses from young pigs at three environmental temperatures, measured in a direct calorimeter. Anim. Prod. 10: 135147.
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Mount, L. E. and Willmott, J. V. 1967. The relation between spontaneous activity, metabolic rate, and the 24 hour cycle in mice at different environmental temperatures. J. Physiol., Land. 190: 371380.
Taylor, J. C. and Lonsdale, C. R. 1969. The artificial rearing of calves and their growth on grass diets. J. agric. Sci., Camb. 73: 279289.

Growth of pigs fed cool whey at two ambient temperatures

  • C. W. Holmes (a1)

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