TY JOUR TI Study of the influence of soybean protein hydrolyzate for poultry KW soybean protein hydrolyzate KW laying hens KW quails KW egg production KW anti-stress action JO Adaptive Fodder Production AU Ezelev, A.V. AU Tkachenko, Y.G. AU Fedorova, Z.N. AU Bliadze, V.G. PY 2019 IS 2019 PB Federal Williams Research Center of Forage Production and Agroecology