TY - JOUR JO - Journal of Animal and Feed Sciences J2 - J. Anim. Feed Sci. SN - 1230-1388 VL - 14 IS - Suppl. 1 PY - 2005 ID - Żyła2005 TI - Degree of phytate conversion and type of phytase A modify production parameters and egg shell quality in laying hens AB - At low levels of dietary calcium and phosphorus (2.8 and 0.36%, respectively), the degree of phytate conversion raised by adding phytase B to feeds that had already been supplemented with 3- or 6-phytase A, modulated production parameters, and egg shell quality of Hy Line Brown laying hens fed maize-soyabean meal from week 40 to 54. Feed consumption, laying rate, mean egg weight and shell breaking strength depended on the type of phytase A added to feeds only at a low phytate conversion degree. Egg production and feed per egg conversion ratio did not depend on the dietary supplements studied. AU - Żyła, K. AU - Mika, M. AU - Koreleski, J. AU - Świątkiewicz, S. SP - 515 EP - 518 DA - 2005 DO - 10.22358/jafs/70720/2005 UR - https://doi.org/10.22358/jafs/70720/2005 ER -