Influence of High Crystalline Amino Acid Inclusion on Poultry Diet Formulation and Pellet Quality

A total of 3 broiler diets were pelleted to determine the effects diet formulation on pellet quality. Dietary treatments consisted corn and soybean meal (SBM)-based control, control with crystalline Val, Val Ile. As amino acids (AA) increased in diets, concentrations as SBM choice white grease (CWG) removed balance for nitrogen-corrected metabolizable energy (MEn). Diets contained 54.2, 56.4, 57.5% corn; 39.1, 37.1, 36.2% SBM; 2.5, 2.1, 1.9% CWG + Ile respectively. Corn was ground approximately 1,000 μm used mix 1,100 lb feed per treatment. There replicates treatment time processing a blocking factor order randomized within each block. via steam conditioning (10 × 55 in., Wenger twin staff preconditioner, Model 150) using mill (CPM PM 1012-2 HD) equipped 3/16 1 ¼ in. die. The target temperature 185°F 30 s at 34 lb/min production rate. Pellet samples collected cooled an experimental counterflow cooler 15 min percent fines, standard durability index (PDI; ASABE S269.4, 2007), modified PDI (three 19-mm hex nuts) Holmen NHP100 60 s. Hot decreased (P < 0.01) compared which 184.5, 185.1, 185.088°F, kilowatts (kW) 9.1, 8.9, 10.3 kW 0.05) diets. Percent fines AA added fat diet. For PDIs 66.5, 73.6, 76.6% standard; 46.9, 52.8% modified; 53.4, 67.8, 73.7% methods, In conclusion, increasing AA, Ile, led improved quality, can be explained by 0.4% or 0.6% reduction balancing MEn