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The partition and utilisation of energy and nitrogen by sows during their first lactation

Published online by Cambridge University Press:  22 November 2017

B.P. Mullan  and
W.H. Close
B.P. Mullan
Affiliation:
AFRC Institute for Grassland and Animal Production, Church Lane, Shinfleld, Reading, Berkshire RG2 9AQ
W.H. Close
Affiliation:
AFRC Institute for Grassland and Animal Production, Church Lane, Shinfleld, Reading, Berkshire RG2 9AQ
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Extract

If dietary intake is insufficient to meet the metabolic needs of the sow during lactation then maternal body reserves (body fat and body lean) are mobilised to support milk production. However the extent to which body reserves are mobilised may influence the metabolic and physiological state of the sow and hence reproductive function after weaning (Mullan and Close, 1989). There is little available information on the metabolic response of the lactating sow and the present experiment was designed to study the partition and utilisation of energy and nitrogen (N) intake in sows during their first lactation. This should aid in the understanding of how the dynamics of nutrient utilisation during lactation may influence the metabolic and reproductive state of the sow.

The experiment was designed in a 2 X 2 factorial arrangement (5 animals per treatment) with 2 levels of feed (H, 5.5 kg/d and L, 3.0 kg/d) during lactation and with 2 litter sizes at each feeding level (6 or 12). Sows were accommodated throughout the 21-day lactation in farrowing crates adapted to permit the total collection of sow and piglet excreta.

Type
Pig Growth and Nutrition
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1989 , March 1989 , pp. 34
Copyright
Copyright © British Society of Animal Production 1989

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References

Mullan, B.P. and Close, W.H. 1989 The effect of dietary intake and litter size on the productivity of first-litter sows. British Society of Animal Production: Winter Meeting 1989CrossRefGoogle Scholar
Mullan, B.P., Close, W.H. and Cole, D.J.A. 1989 In Recent Advances in Animal Nutrition - 1989. Edited by Haresign, W. and Cole, D.J.A. Butterworths, London Google Scholar