Fermentinių ir prebiotinių preparatų įtaka viščiukų – broilerių produktyvumui bei mėsos kokybei

Abstract

Many feed additives are designed to secure animal’s health status and to optimize growth performance. Among others, antibiotics have been used as growth promoters for a number of years in intensive animal production systems. However, the increasing public concern over the production of food from animals has led to worries about the routine use of antibiotics in animal production. It is now feared that antibiotic residues could get into food for human consumption. The use of antibiotics as promoters of animal performance in the EU was banned by January 2006 (Øverland et al., 2003). Inborr (2000) has reported that with the aid of number of alternatives including probiotics, prebiotics (mainly oligosaccharides) and feed enzymes not only has the general health status of the poultry been maintained, but also the growth performance and feed efficiency improved. The aim of our research project was to determine the effect of different prebiotics - mannanooligosccharides, fructooligosaccharides and enzymes on broiler chickens growth performance and meat sensory attributes. To realize this aim, we conducted two experiments: 1. Effects of enzymes RovabioTMExcel AP and prebiotics mannanoligosaccharides Agrimoss on broiler chickens body weight, feed conversion (kg feed/kg weight gain), mortality, breast and leg meat pH, breast fatty acids concentration and breast and leg meat sensory attributes. 400 broiler chickens were allocated to two groups and for 35 days were fed basal diet (control) and basal diet suplemented with enzymes RovabioTMExcel AP and mannanoligosaccharides Agrimoss. 2. Effects of prebiotics fructooligosaccharides Raftifeed®OPS and enzymes xylanase Natugrain®Wheat G on broiler chickens body weight, feed conversion (kg feed/kg weight gain) and breast and leg meat sensory attributes. 400 broiler chickens were allocated to two groups and for 35 days were fed basal diet (control) and basal diet suplemented fructooligosaccharides Raftifeed®OPS and xylanase Natugrain®Wheat G. The results showed that RovabioTMExcel AP and Agrimoss improved broiler chickens body weight 4% (p<0.05) and feed conversion decreased 6%. In addition of these feed supplements pH of breast meat had tendency decreased and leg meat – increased during 0, 24, 48 and 72 hours subsequent periods. In supplementation with RovabioTMExcel AP and Agrimoss increased breast fatty acids - palmitic, margaritic, oleic, linoleic, linolenic and arachidic acids concentration. RovabioTMExcel AP and Agrimoss had no effect on meat sensory attributes, all samples were determined like acceptable. We determined that in addition of Raftifeed®OPS and Natugrain®Wheat G broiler chickens body weight increased 6% and feed conversion decreased 6%, compared to control. It was found that Raftifeed®OPS and Natugrain®Wheat G and Natugrain®Wheat G had effect on broiler chickens leg meat total taste.