%0 Journal Article %T THE DEPENDENCE OF EGG PRODUCTION OF LAYING HENS ON THE COMPOSITION OF ENZYME PREPARATIONS %A Ivanova, E.. %A Lavrentev, A.. %K enzyme preparations, amilosubtilin, CelloLux, protosubtilin, feed, feeding rate, egg production, egg weight. %J Vestnik of Kazan State Agrarian University %D 2014 %N 9 %P 2 %I Kazan state agrarian University