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The Influence of Fatness at Parturition. Nutrition during Lactation and Litter Size on the Performance of Breeding Sows

1. Changes in Backfat Thickness. Body Weight and Conformation

Published online by Cambridge University Press:  22 November 2017

H. Yang ,
P. Phillips ,
C.T. Whittemore  and
P.R. Eastham
H. Yang
Affiliation:
Edinburgh School of Agriculture, West Mains Road, Edinburgh EH9 3JG
P. Phillips
Affiliation:
Edinburgh School of Agriculture, West Mains Road, Edinburgh EH9 3JG Scottish Agricultural Statistics Service, JCMB, Mayfield Road, Edinburgh EH9 3JZ
C.T. Whittemore
Affiliation:
Edinburgh School of Agriculture, West Mains Road, Edinburgh EH9 3JG
P.R. Eastham
Affiliation:
Edinburgh School of Agriculture, West Mains Road, Edinburgh EH9 3JG
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Extract

To help resolve the dynamics of fatty tissue mobilisation, and interactions with milk yield and reproductive performance, the experiment reported here takes gilts and sows over four parities to one of two levels of strategic fatness at parturition, and then studies the consequences of high or low lactation feed intakes in conjunction with strong or weak milk withdrawal potentials as achieved by manipulation of litter size.

One hundred and two Large White x Landrace F1 hybrid gilts were purchased from the Cotswold Pig Development Company Limited at about 30 kg live weight. At mating, animals were allocated at random to one of B treatments comprising: two levels [fat and thin) of target backfat thickness at parturition (10-14 mm. T vs 20-24 mm. F): two daily feeding levels (high and low) during 4-week lactation [3 kg, L vs ad libitum to a maximum of 7 kg. H): and two sizes of sucking litter (5 vs 9 in parity I. and 6 vs 10 in parities 2. 3 and 4).

Type
Sow Performance
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1988 , March 1988 , pp. 39
Copyright
Copyright © The British Society of Animal Production 1988

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