Effect of reducing high-protein supplement portion on production traits of free range grown sasso chickens

Provedeno je istraživanje utjecaja različitih udjela dopunske krmne smjese na proizvodne pokazatelje pilića u svrhu smanjenja cijene proizvodnje. U istraživanju je korišteno 90 jednodnevnih pilića hibrida SASSO, držanih na ispustima od trećeg tjedna starosti i zaklanih nakon 83 dana tova. Ulazna masa pilića iznosila je 40 grama. Pilići su bili razmješteni u tri odvojene skupine koje su hranjene krmnim smjesama s različitim udjelom proteina i čiji se prirast mjerio tjedno. Spol je determiniran kod klanja, nakon čega je izvršen rasjek i vaganje pojedinih dijelova trupa. Prosječne mase trupova iznosile su 2045,5; 2162,33; 2059,67 g za kontrolnu (K), prvu (P1), odnosno drugu pokusnu skupinu (P2) te između njih nije bilo statistički značajne razlike. Izračunom razlike između prihoda od proizvedenog pilećeg mesa i troška krmne smjese dobiveni su iznosi od 1326,4; 1716,4; 1698 HRK za K, P1, odnosno P2 skupinu čime se zaključuje najviša isplativost hranidbenog tretmana P1 skupine.Experiment was conducted to assess the effect of reducing high-protein supplement portion in feed mixtures of slow-growing SASSO chickens on their growth performance and carcase traits with the aim of lowering the price cost of free-range chicken meat production. The experiment was performed on 90 day-old SASSO chickens weighing 40 g, and reared in outdoor cages after first three weeks of raising indoors. Chickens were divided into 3 feeding groups (K, P1, P2) each receiving different levels of crude protein. They were weighed on a weekly basis and slaughtered after day 83. Sex was determined at slaughtering, and hand evisceration was performed after. The results given after carcase processing and analysis showed no significant difference of carcase weight between groups (2045,5; 2162,33; 2059,67 g for K; P1; P2 respectively). Considering the income after the sale of chicken meat (1326,4; 1716,4; 1698 HRK for K; P1; P2 respectively), feeding treatment of P1 group proved the most profitable