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The aim of this study was to compare the carcass parameters in pig fattening units with different management system - a complete all-in-all-out system for the whole farm (Group 1) and fattening farms continously put pigs into the fattening units (Group 2). In both groups the carcasses weight, fat thickness, lean meat content were compared. Carcass weight was detected using scales in slaughter line („Soenle", Germany). Meatness (lean meat content) of pig carcasses was detected using „Introscope" (SFK, Denmark) device. The results of performed study showed, that average weigh of carcasses in Group 1 was on 4.9 kg (p<0.05) higher, fat on 1.3 mm (p<0.05) thiner compared to Group 2. The average of lean meat content in carcass was on 1.7% (p<0.05) higher in pigs from Group 1 compared to carcasses in Group 2. In carcasses of pigs with complete all-in-all-out system for the whole farm the highest meatness classes (S,E,U) were found on 1.15 times (p<0.05) more frequently compared to the fattening farms continously put pigs into the fattening units. [ABSTRACT FROM AUTHOR]

The aim of this study was to evaluate the date of carcasses of pigs grown in A and B large farms in Lithuania. The carcasses weight, fat thickness measured in F1and F2 points, a diameter of loin in Fat2 point were compared in carcasses of pigs grown in 2 different farms. Meatness (lean meat content) of pig carcasses was detected using FOM S 70 device. In addition the influence of feed rations on pigs carcasses meatness was evaluated. The results of this study showed, that average weigh of carcasses of pigs grown in A farm, was 1.04 times (P<0.05) smaller, fat measured in F1 point 1.14 times (p<0.05), and in F2 point - 1.02 times (p>0.05) were thinner compared to B farm pigs. The average of carcasses lean meat content was 1.018 (p<0.05) times higher in pigs, grown in A farm than in carcasses of pigs obtained from B farm. In pigs carcasses obtained from A farm, the highest classes (S, E, U) of lean meat content, were detected in 97% cases, although in B farm - 83% of cases respectively. In farm A kept pig crossbreds of English White Large, Lorwegian Landrasses, Pjetrains breeds were leaner than grown in B farm crossbreds obtained from crossing Lithuanian White, Danish Diuroc, Danish Jorkshyre, Danish Landrasses breeds. It was detected that in A farm feed rations for fattening pigs, 0,38 MJ dietary energy or 1,11%, 2,4% green protein, 7,22% fat, 0,01% triptophan, and 0,5% of Na were higher than in rations used in B farm respectively. [ABSTRACT FROM AUTHOR]