Protein dispersibility index as an indicator of adequately processed soybean meal

摘要: Three chick assays (8 to 17 or 21 d) were conducted evaluate protein dispersibility index (PDI) as an indicator of minimum adequate heat processing soybean meal compared with the urease and solubility in 0.2% KOH. Solvent-extracted soyflakes (SF) subjected various autoclaving times at 121 C 105 kPa included 23% CP dextrose-SF diets 20% corn-SF-corn gluten diets. Autoclaving Chick Assays 1, 2, 3 0 36 min, 30 12 respectively. Body weight gains gain-to-feed ratios increased (P < 0.05) SF heating time (0 18 min Assay 10 9 3), no additional improvement for longer times. Urease values (pH increase) high initially shorter (1.65 2.4), then decreased suddenly 0.3 below two three assays. The KOH generally increased, but responses often inconsistent. Protein displayed most consistent time: it from above 70% 30% (mean r2 linear regression PDI on was 0.92 assays). latter particularly evident times, which yielded greatest changes growth performance. These results suggest that is a more sensitive than