Effects of feeding level from 20 to 45 kilograms on the performance and carcass composition of pigs grown to 90 kilogram live weight

Campbell, R.G.; Taverner, M.R.; Curic, D.M.

Livestock Production Science 10(3): 265-272

1983


ISSN/ISBN: 0301-6226
DOI: 10.1016/0301-6226(83)90061-1
Accession: 005303947

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Abstract
Female pigs (27) were used to study the effects of 3 levels of feeding (low, moderate and ad lib) from 20-45 kg on growth performance and carcass composition to 90 kg live weight. During the live weight phase 20-45 kg, raising the level of feeding increased growth rate (P < 0.05), body fat and carcass fat measurements (P < 0.05), but reduced body water (P < 0.05). Subsequent to 45 kg, pigs previously fed at the lowest level grew more rapidly (P < 0.05) and had lower (P < 0.05) feed conversion ratio (FCR) than pigs from either of the other feeding treatments to 45 kg and at 90 kg were leaner (P < 0.05) than pigs offered feeding ad lib between 20 and 45 kg. For total test (20-90 kg), pigs fed at the lowest level to 45 kg grew at a slower rate (P < 0.05), but had a lower FCR (P < 0.05) than pigs from the other 2 feeding treatments before 45 kg. Pigs subjected to the moderate feed restriction between 20 and 45 kg grew at a similar rate from 20-90 kg, but had a lower FCR (P < 0.05) than those offered feeding ad lib before 45 kg.