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Some aspects of energy metabolism of the sow during pregnancy

Published online by Cambridge University Press:  02 September 2010

M. W. A. Verstegen ,
A. J. H. van Es  and
H. J. Nijkamp
M. W. A. Verstegen
Affiliation:
Departments of Animal Husbandry and Animal Physiology, Agricultural University, Wageningen, The Netherlands
A. J. H. van Es
Affiliation:
Departments of Animal Husbandry and Animal Physiology, Agricultural University, Wageningen, The Netherlands
H. J. Nijkamp
Affiliation:
Departments of Animal Husbandry and Animal Physiology, Agricultural University, Wageningen, The Netherlands
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Summary

Sixteen energy and N-balance trials with six sows were performed to study the energy requirement and protein gain of the animals during different stages in the second half of pregnancy. Energy and N-balances were measured during periods of 1 week and gaseous exchange was measured in a respiration chamber. The animals received 2·0,2·5,2·75 or 3 0 kg/day of a normal concentrate ration for sows. In one experiment, one animal had a negative energy balance on the 2 kg ration in the sixth week of pregnancy but in the other experiments the dietary energy intake was sufficient for positive energy balances until a few days before parturition. The N-balances were about 20 to 32 g/day in the second half of the gestation period. With 2·5 and 2·75 kg feed there was a negative deposition of fat at about 2 weeks before parturition. Heat production increased during pregnancy, but at a greater rate during the last 2 weeks. Until 2 to 3 weeks before parturition 2·5 to 2·75 kg of feed seemed to be adequate to meet the energy requirement of a pregnant sow of 180–200 kg live weight. During the last 2 weeks 3 kg was sufficient.

Type
Research Article
Information
Animal Production , Volume 13 , Issue 4 , November 1971 , pp. 677 - 683
Copyright
Copyright © British Society of Animal Science 1971

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