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The effect of nutrition on the reproductive performance of first-litter sows 1. Feeding level during lactation, and between weaning and mating

Published online by Cambridge University Press:  02 September 2010

R. H. King  and
I. H. Williams
R. H. King
Affiliation:
Department of Animal Science, University of Western Australia, Nedlands, Western Australia 6009, Australia
I. H. Williams
Affiliation:
Department of Animal Science, University of Western Australia, Nedlands, Western Australia 6009, Australia
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Abstract

A factorial experiment was conducted with 80 first-litter sows and involved two levels of feeding during lactation (ad libitum or 2·0 kg/day), and two levels of feeding between weaning and mating (4·0 or 1·5 kg/day).

Average lactation length was 32·2 days. Sows given 2·0 kg/day during lactation lost more backfat (6·3 v. 0·9 mm; P < 0·05) and more live weight (36·8 v. 9·1 kg; P < 0·05) during lactation than sows fed ad libitum and whose average daily food intake was 4·47 kg. Sows receiving 20 kg/day during lactation took longer to return to oestrus after weaning. Within 8 days of weaning more sows fed ad libitum during lactation ovulated (0·90 v. 0·40; x2 = 20·0; P < 0·001) and exhibited oestrus (0·78 v. 0·38; x2 = 12·8; P < 0·001) than sows whose food intake throughout lactation was restricted. Ovulation rate, subsequent litter size and embryonic mortality were not significantly affected by feeding level during lactation.

Post-weaning feeding level did not affect the interval between weaning and oestrus. However, sows receiving 4·0 kg/day between weaning and mating had higher ovulation rates (14·8 v. 13·0; P < 0·05) and a greater litter size (10·0 v. 8·8; P < 0·1) at the subsequent farrowing.

Type
Research Article
Information
Animal Production , Volume 38 , Issue 2 , April 1984 , pp. 241 - 247
Copyright
Copyright © British Society of Animal Science 1984

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