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The objective of this study was to determine the effects of various feeding and housing systems on fattening performance, slaughter value and biochemical serum parameters in growing-finishing pigs. The experimental material comprised 90 growing-finishing pigs, divided into six groups of 15 animals that were diverse in terms of rearing (with or without free access to outdoor runs) and feeding systems (fed increased metabolizable energy (ME) content diets with or without green alfalfa). Different feeding regimes and rearing systems had no significant effects on most fattening results and the carcass traits of the pigs except for daily water and diet intake and feed/gain ratio. Daily water intake was lower in pigs fed complete diets plus green alfalfa forage. Low-density lipoprotein (LDL) cholesterol concentrations were statistically lower in the blood serum of Groups 3 and 6 than in Groups 2 and 4. High-density lipoprotein (HDL) cholesterol levels were significantly higher in the serum of Group 6, compared with other groups. Group 3 had significantly higher triglycerides levels compared with Groups 1, 2, 4, 5 and 6. Taking into consideration all these dependencies, it could be assumed that feeding regime and rearing with access to outdoor runs might improve not only blood lipid profile, but also the dietetic value of pork. It seems that feeding a complete diet with increased ME, plus green alfalfa forage and rearing indoors with free access to outdoor runs, gave the best results. ______________________________________________________________________________________

Feed preference (Experiment I) and growth performance tests (Experiment II) were carried out on growing pigs fed on diets differing in yellow lupin levels. In Experiment I, dietary choices were determined using the single stimulus method on 12 individually kept young pigs. In Experiment II, basic growth parameters were studied in 36 young pigs. Three diets were used: control (1), with soyabean meal (SBM) as the only high-protein component, and experimental diets in which lupin protein substituted for 75 (diet 2) or 100% (diet 3) of SBM protein. The lupin content in diets 2 and 3 was 19 and 25%, respectively. During a 28-day feed preference test, daily intake of the three diets amounted to 760, 736 and 700 g, respectively; the differences are statistically significant. The average daily weight gains and feed intake were similar, while the best feed conversion ratio was in pigs fed on the diet with 19% yellow lupin seed meal.

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