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Report no. 494Lars Egelund Olsen Jes Callesen By
Per Tybirk
07.12.2000
Feeding finishers according to sex
Abstract
Each treatment comprised approx. 62 female pigs and approx. 62
castrates. All registrations were made on individual animals. The
test comprised the following four treatments for both female pigs
and castrates:
The chemical analyses of the feed showed an average of 1.13 FUp/kg and 1.02 FUp/kg in the high and low-energy mixes, respectively. Thereby, the difference in energy was smaller than intended. The other analyses concorded fairly well with the planned content. The test revealed that from 55 kg until slaughter at approx. 100 kg, the pigs achieved the best gain when they were fed the feed with the highest content of energy. However, the castrates obtained a better lean meat percentage when they were fed the feed with a lower content of energy in this period. The test could not prove any effect of the protein level on either gain, feed conversion or lean meat percentage. A large part of the castrates had a lean meat percentage above 57 when the energy level in the feed was reduced. For producers of heavy pigs or other specialised productions with a high slaughter weight, there may be a gain in reducing energy content in the feed for castrates in order to have a larger part of the delivered pigs approved regarding lean meat percentage. |
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