THE APPLICATION OF ENZYME PHYTASE IN FEED MIXTURES FOR REDUCTION OF THE PHOSPHORUS-CONTENT IN POULTRY FECES

The activity and optimal conditions for the efficiency of phytase of e nzymatic preparation NATUPHOS were studied in experiments in vitro. Th e maximum effect of phytase of this preparation was found at temperatu res between 50-55 degrees C and environmental pH 5.0. Pepsin in HCl en vironment at pH 2.1 and temperature of 40 degrees C for 30 min decreas ed the activity of phytase in preparation NATUPHOS by 18.83%. The effe ct of phytase of enzymatic preparation NATUPHOS in feed mixtures with a decreased level of phosphorus in the form of dicalcium phosphate (Di CaP) on selected parameters of utility was studied in a feeding compar ative and metabolism trial with chicken broilers. The decrease by 50% or total absence of DiCaP in feed mixtures BR 1 and BR 2 significantly (P < 0.05) to highly significantly (P < 0.01) negatively affected par ameters of growth, feed consumption, Ca and P deposition in the tibia and Ca and P digestibility. The addition of enzymatic preparation NATU PHOS significantly (P < 0.05) to highly significantly (P < 0.01) posit ively affected all parameters studied. The application of enzymatic pr eparation NATUPHOS in mixtures BR 1 and BR 2 with 50% and 0% share of DiCaP resulted in a statistically significant (P < 0.01) decrease of p hosphorus percentage in poultry faeces (by 27.50 to 48.68%).