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Effect of early weaning at about 30 days after farrowing on the reproductive characteristics in gilts and sows

Published online by Cambridge University Press:  27 March 2009

Hirokazu Shimizu  and
Saburo Takeuchi
Hirokazu Shimizu
Affiliation:
Laboratory of Animal Reproduction, Faculty of Agriculture, Tohoku University, Sendai, Japan
Saburo Takeuchi
Affiliation:
Laboratory of Animal Reproduction, Faculty of Agriculture, Tohoku University, Sendai, Japan
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Summary

Records have been analysed from a small herd in which early weaning was practised. Piglets were weaned when average weight was 7–8 kg, at about 30 days old. Decreased feeding of sows, followed by a short period of fasting, was practised at weaning.

Mean duration of suckling was 31·5 days and mean interval from weaning to oestrus 6·0 days. 93% of sows conceived to service at the first or second heat period. Mean farrowing interval for all sows was 159·7 days (151·9 days for those holding to the first service). Corresponding annual farrowing frequencies, calculated from these figures, are 2·29 and 2·40.

Litter sizes at birth and at weaning were 10·7 and 9·3; corresponding weights of piglets were 1·74 and 7·99 kg. With increase of litter sequence there was a significant decrease of weaning weights; however, there was also an increase in size of litter weaned. Seasonal changes of piglet weight were also found. Early weaning can be considered a useful way to increase production.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 72 , Issue 2 , April 1969 , pp. 247 - 250
Copyright
Copyright © Cambridge University Press 1969

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