A. Clinquart et al., SOYA OIL IN THE DIET OF GROWING-FATTENING BULLS .1. EFFECTS ON ANIMALPERFORMANCE AND CARCASS COMPOSITION, Journal of animal physiology and animal nutrition, 74(1-2), 1995, pp. 9-14
Twelve growing-fattening bulls were offered either a control diet base
d on concentrate or a diet supplemented with soya oil at an incorporat
ion rate of 33 g/kg. The incorporation of soya oil tended to increase
average daily gain (1.42 vs. 1.40 kg/day) and reduce daily food intake
(1.87 vs. 2.01 kg/100 kg body weight) so that the food-conversion rat
io was improved (5.80 vs. 6.35 kg/kg). The carcass weight was 302.6 kg
with the control diet and 304.4 kg with oil supplementation, these di
fference nor being significant. The respective killing-out proportions
were 572.3 and 581.1 g/kg. The main effect of fat supplementation on
the boneless-carcass composition was a non-significant increase in adi
pose tissue (245.1 vs. 235.1 g/kg), this effect being associated with
a non-significant increase in ether-extract content in meat (101.9 vs.
86.7 g/kg). The proportion of oleic acid increased (p < 0.01) and the
proportion of palmitic acid decreased (p < 0.05) in perirenal and int
ermuscular fats, resulting in a higher total unsaturated-fatty-acids p
roportion (p < 0.01 and p < 0.001). Similar findings were observed in
intramuscular fat but were not significant.