Аннотации:
The objective of this study was to assess the effect of AgpP-P phytase supplementation on productivity, nutrient availability, zoo-sanitary assessment of meat and serum biochemical parameters of Hubbard broilers. A total of 180 one-day-old Hubbard broiler chickens were randomly divided into 2 groups (control and experimental) with 3 replicates and 30 broilers per replicate. In the experimental group, the diet was supplemented with phytase preparation at 1000 FTU/kg. Results showed that phytase supplementation increased body weight and absolute weight gain in Hubbard broilers, while reducing the total amount of feed consumed by birds (PC0.05). Phytase improved the availability and absorption of organic nutrients, calcium and phosphorus. However, no differences were observed for N absorption (PC0.05). Phytase supplementation increased Ca and P contents, total protein level and alanine aminotransferase activity, and reduced urea level, aspartate aminotransferase and alkaline phosphatase activities in serum (P C 0.05). The meat of phytase-fed broilers meets Russian State Standards for fresh, good-quality meat based on organoleptic and physico-chemical characteristics. In conclusion, it was established that the addition of phytase at 1000 FTU/kg to the diet for broilers enhances the digestibility of the organic and mineral components of the feed ration, increases body weight in birds and reduces the amount of feed consumed.
