Comparison of dietary nutritive value and slaughter weight effects on traits of fattening, carcass quality and meat quality in pigs of White Meat breed
1999
Kovac, L. | Vagac, G. (Slovenska Polnohospodarska Univ., Nitra (Slovak Republic)) | Flak, P. | Vician, M.
The efficiency of two feed mixtures was compared in pigs of white meat breed before they reached slaughter weight 100 kg (A) and about 120 kg (B). The currently used feed mixture OPO (Z1) contained 170 g/kg proteins, 150 g/kg digestible proteins, 12.50 MJ/kg ME, 8.5 g/kg lysine. Feed mixture OS-03 (Z2) contained 191.19 g/kg proteins, 159.27 g/kg digestible proteins, 12.96 MJ/kg ME, 11.05 g/kg lysine. Live weight x feed mixture interactions were statistically determined for the weight of back and loin meat, sparerib and shoulder. Better parameters of meat quality, evaluated on the basis of pH1 and pH24 in m.l.t, meat color and free water content, were calculated for Z2 in comparison with Z1. Average daily weight gains decreased with growing live weight, feed consumption per 1 kg weight gain increased significantly, and a change in carcass structure was observed as fat production increased hindering lean cut production. The results were better when feed mixture OS-03 was used. Feed mixture with better balance of amino acids, mainly lysine, appeared to provide higher growth rate and better parameters of meatiness and meat quality.
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