The effects of particle size, milling method, and thermal treatment of feed on performance, apparent ileal digestibility, and pH of the digesta in laying hens Isabelle Ruhnke,∗ 1 Ilen R¨ ohe,∗ Carolin Kr¨ amer,∗ Farshad Goodarzi Boroojeni,∗ Fanny Knorr,∗ ∗ ∗ Anneluise Mader, Erin Schulze, Abdul Hafeez,∗ Konrad Neumann,† Rainer L¨ owe,‡ and J¨ urgen Zentek∗ ∗
Institute of Animal Nutrition, Department of Veterinary Medicine, Freie Universit¨ at Berlin, K¨ onigin-Luise-Straße 49, 14195 Berlin, Germany; † Institute of Biometry and Clinical Epidemiology, Charit´e Campus Berlin Mitte, Berlin, Germany; and ‡ Internationale Forschungsgemeinschaft Futtermitteltechnik e.V., Frickenm¨ uhle 1A, 38110 Braunschweig (Thune), Germany
Key words: chicken, feed technology, hammer mill, poultry, roller mill 2015 Poultry Science 00:1–8 http://dx.doi.org/10.3382/ps/pev030
INTRODUCTION
particles are preferred and more rapidly ingested (Amerah et al., 2007; Nir et al., 1994; Yasar, 2003). Feed with high fractions of small particle sizes (
Institute of Animal Nutrition, Department of Veterinary Medicine, Freie Universit¨ at Berlin, K¨ onigin-Luise-Straße 49, 14195 Berlin, Germany; † Institute of Biometry and Clinical Epidemiology, Charit´e Campus Berlin Mitte, Berlin, Germany; and ‡ Internationale Forschungsgemeinschaft Futtermitteltechnik e.V., Frickenm¨ uhle 1A, 38110 Braunschweig (Thune), Germany
Key words: chicken, feed technology, hammer mill, poultry, roller mill 2015 Poultry Science 00:1–8 http://dx.doi.org/10.3382/ps/pev030
INTRODUCTION
particles are preferred and more rapidly ingested (Amerah et al., 2007; Nir et al., 1994; Yasar, 2003). Feed with high fractions of small particle sizes (
