Phytase as a factor of improving broilers growth performance and environmental protection

ABSTRACT The aim of this work was to find out the possibility how to increase the availability of phytic phosphorous and, at the same time, decrease phosphorous excretion through faeces into the environment when using phytase in broilers fed diets based on corn, soybean and sunflower meal with reduced level of phosphorous added. In all feeding periods of broilers, the group fed trial mash II with reduced phosphorous level and phytase had higher body weight by 2.0-18.7% during the trial, better feed conversion by 7.0% at the end of the trial and by 17.7% at the end of the second week, mortality lower by 16.7% and decrease of phosphorous level in faeces by 5.4 to 22.4 during the trial. The positive production results obtained in broiler feeding have shown that phytase added affected the increase of availability of trial mashes based on corn, soybean and sunflower meal with reduced level of phosphorous added