INFLUENCE OF PROBIOTIC PREPARATION YEASTURE-W ON THE PRODUCTIVITY AND MEAT QUALITY OF BROILER CHICKENS**

**Original scientific paper Abstract: Probiotics are widely accepted as an alternative to in-feed antibiotics in poultry production. The objective of investigation was to research the effect of probiotic preparation YEASTURE-W for growth performance, meat and carcass quality of broiler chicks. The experiment was performed with 120 Hybro–PN broiler chickens 1−56-day-old, divided into 2 groups of 60 birds each. The both groups were fed crumbled feed mixtures ad libitum. The feed mixture of the experimental group was supplemented with probiotic preparation YEASTURE-W (2 kg/t feed). The birds were maintained on deep litter and watered from stationary watering containers. The results of experiments indicated, that probiotic preparation YEASTURE-W during all experiment period increased the weight of broiler chickens by 10 % (P<0.001) and decreased feed conversion ratio by 9% (P<0.005) comparing with control group. A probiotic showed a tendency to improve the carcass yield and improve the yield of edible parts of broiler chickens. The culinary and chemical properties of poultry became better

Determination of nutritive value of distiller's yeast and its effect on sensory properties of poultry meat

Vytauto Didžiojo universitetasŽemės ūkio akademij

The Effect of monocalcium phosphate on the ileal availability of calcium and phosphorus in broiler chickens

Analizuojant lesaluose esančio monokalcio fosfato poveikį viščiukų broilerių Ca ir P apykaitai, atliktas lesalų maisto medžiagų virškinamumo bandymas. Kontrolinės grupės viščiukai lesinti kombinuotaisiais lesalais, kuriuose buvo 1,4 proc. monokalcio fosfato; pasisavinamojo fosforo kiekis – 0,44 proc., Ca ir P santykis – 2:1. Tiriamųjų grupių viščiukų racionuose monokalcio fosfato buvo 0,6; 1,6 ir 2,6 proc., pasisavinamojo fosforo atitinkamai – 0,4; 0,6 ir 0,8 proc., Ca ir P santykis atitinkamai 2,3:1; 1,5:1 ir 1,2:1. Nustatyta, kad geriausiai kalcio ir fosforo pasisavinama (fosforo – 65–66 proc., kalcio – apie 48 proc.), kai šių mineralų santykis lesale yra 2–2,4:1, o pasisavinamojo fosforo kiekis 0,4–0,44 proc. lesale esant 2660 TV vitamino D3 koncentracijaiThe metabolic experiment was conducted to analyze the effect of manocalcium phosphate on calcium (Ca) and phosphorus (P) availability in broiler chickens. Broiler chickens in control group (Group 1) were assigned to a diet supplemented with 1.4% of monocalcium phosphate (0.44 % of available P (aP); Ca:P ratio – 2:1), while the chickens in 3 remaining experimental groups (Groups 2, 3 and 4) were given a diets supplemented with 0.6%, 1.6% and 2.6% of monocalcium phosphate, respectively, aP comprised 0.4%, 0.6% and 0.8 % and Ca:P ratio was 2.3:1; 1.5:1 and 1.2:1. The results showed that the highest ileal P and Ca availability (P–65- 66 %; Ca - 48.0 %) was for Ca and P ratio of 2-2.4:1, and amount of aP – 0.4-0.44%, when concentration of vitamine D3 in the feed comprised 2660 IUVytauto Didžiojo universitetasŽemės ūkio akademij