Sobolewska, Sylwia; Orda, Janusz; Budny-Walczak, Anna - In: Economic and Environmental Studies (E&ES) 15 (2015) 4, pp. 461-468
phosphorus, calcium, manganese and zinc. Phytase supplementation caused a decrease in phosphorus excretion by 8% in the group … calcium excretion was found. There was no impact of phytase supplementation on egg production and egg weight. …