Vliv exogenní fytázy na stravitelnost fytátového fosforu u slepic

The task of my thesis was to investigate the influence of the exogenous phytase on phytate phosphorus retention. The work describes the importance of phosphotus, its digestion and absorption, phosphorus sources, what the need for phosphorus is and what it affects, and its division phosphorus digestibility and the phytase is described in the conclusion. Phytase is added because of poorer utilization of phosphorus from vegetable feed for poultry. The supplement of phytase significantly increases the utilization of phosphorus. In the case of lack of phosphorus or its excess various diseases can develop, and moreover the level of phosphorus affects other minerals in the body. That's why the standards of nutrient requirements for poultry are processed. The function of phosphorus is closely related to calcium, therefore it is important to keep their proportion in the feed balanced. The effects of adding phytase on the use, storage and excretion of phosphorus were monitored through the collection and analysis of droppings and the collection and assessment of the quality of the eggs. In the droppings was monitored how much phosphorus was not used, and in egg's case was monitored the quality egg shell, which also affects the economics of egg production