ORIGINAL PAPER
Effect of the feeding level during the fattening
phase on the productive parameters, carcass
characteristics and quality of fat in heavy pigs
1 |
Department of Animal Production, School of Engineering Agronomy, Politechnic University,
28040 Madrid, Spain |
2 |
Department of Animal Production, Veterinary Faculty, Complutense University,
28040 Madrid, Spain |
J. Anim. Feed Sci. 2007;16(4):621–635
Publication date: 2007-11-21
KEYWORDS
ABSTRACT
The objective of this experiment was to study the effect of feeding restriction carried out at the
beginning or at the end of the finishing period on the productive results, carcass characteristics and
fat quality of Iberian pigs fattened with feed in confinement. During the finishing period (77 days,
from 100 to 150 kg of liveweight), the Iberian pigs were given the following feeding treatments:
1. R+AL (restricted feeding from the beginning of finishing period to 43 days later and ad libitum
feeding from 44 days to the slaughter); 2. AL+R (ad libitum feeding from the beginning of the
finishing period to 43 days later and restricted feeding from 44 days to slaughter); 3. C: constant
feeding. The productive results (weight at slaughter, average daily gain and carcass weight) were
higher (P<0.001) in C pigs than in R+AL and AL+R. The treatment had not significant influence
on carcass characteristics except for the variables dorsal fat thickness and ham weight with respect
to carcass weight. The concentration of C18:1n-9 and total MUFA proportions observed in subcutaneous backfat were higher in AL+R and C groups than in R+AL (P<0.05), while the C18:0 and
total saturated fatty acids proportions were lower in AL+R and C pigs than in R+AL (P<0.01). The
dietary treatment had not significant influence on the fatty acids proportions detected in the intramuscular and in liver fat. The results obtained in this experiment suggest the future development of
other experimental designs, to improve the productive results and quality of Iberian pigs fed with
feed in confinement by means of feeding restriction strategies.
CORRESPONDING AUTHOR
A. I. Rey
Department of Animal Production, Veterinary Faculty, Complutense University,
28040 Madrid, Spain
CITATIONS (6):
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