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The influence of fatness at parturition. nutrition during lactation and litter size on the performance of breeding sows

2. Reproductive performance

Published online by Cambridge University Press:  22 November 2017

C.T. Whittemore ,
H. Yang ,
P. Phillips  and
P.R. Eastham
C.T. Whittemore
Affiliation:
Edinburgh School of Agriculture, West Mains Road, Edinburgh EH9 3JG
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 EHQ 3JZ
P.R. Eastham
Affiliation:
Edinburgh School of Agriculture, West Mains Road, Edinburgh EH9 3JG
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Extract

The influence of fatness at parturition, nutrition during lactation and the size of litter upon changes in backfat depth, live weight and conformation of sows over four parities has been presented in the first report. The present report will deal with the consequences for reproductive performance and production efficiency.

One hundred and two Large White x Landrace Fl 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 1, 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. 40
Copyright
Copyright © The British Society of Animal Production 1988

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