Effect of genetically modified maize (Roundup Ready) in complete feed mixtures on digestibility of nutrients and meat quality in broiler rabbits
2002
Chrastinova, L. | Sommer, A. | Rafay, J. | Caniga, R. | Novotna, K. (Vyskumny Ustav Zivocisnej Vyroby, Nitra (Slovak Republic))
The aim of this work to compare the digestibility of nutrients and physical and chemical parameters of quality in meat of broiler rabbits after feeding two complete feed mixtures. The mixture with 11 % genetically modified RR maize (Roundup Ready) contained 159 g crude protein, 20.4 g fat, 235.5 g fibre, 425.2 g nitrogen-free extract and 7.6 MJ ME/kg in original matter. The mixture with 11 % conventional maize contained 164.7 g crude protein, 22.1 g fat, 218.2 g fibre, 427.4 g nitrogen-free extract and 8.15 MJ ME/kg in original matter. The feeding trial was conducted with 50 rabbits from weaning to the slaughtering weight 2500 g. The obtained results suggest minimum, statistically nonsignificant differences in utilization and digestibility of individual nutrients in the tested mixtures. The differences in physical and chemical parameters of quality of meat from broiler rabbits were minimal, statistically nonsignificant also. The content of intramuscular fat was lower with feeding the mixture with RR maize, 1.325 g.100 g compared with 1.425.100 g with feeding the mixture containing the conventional maize. The same tendency was with waterholding capacity in meat, too (30.74.100 g compared with 31.66.100 g). The meat in rabbits fed the experimental feeding mixture with RR maize showed the trend to lower content of connective tissue proteins (0.553 g.100gcompared with 0.571 g.100 g). Negative effect was not noticed on the live weight gain and feed consumption either. We can produce good quality rabbit meat by feeding the tested mixture
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