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Table 5 Effects of protease in diets with raw soybean on FI, BWG (g/b) and FCR, in periods of day 0 to10, day 0 to 24 or day 0 to 35

From: Apparent and standardized ileal nutrient digestibility of broiler diets containing varying levels of raw full-fat soybean and microbial protease

RFFS1 g/kg Protease PROT/kg Feed intake Body weight gain FCR
0–10 0–24 0–35 0–10 0–24 0–35 0–10 0–24 0–35
0 0 315.7 1774 3608 290.4 1364 2626 1.09 1.28 1.36
15,000 317.1 1804 3552 296.5 1470 2631 1.07 1.23 1.35
45 0 294.2 1724 3425 279.4 1335 2566 1.05 1.29 1.39
15,000 306.1 1663 3322 274.9 1402 2537 1.12 1.22 1.34
75 0 294.3 1735 3426 266.3 1330 2444 1.12 1.31 1.43
15,000 291.2 1708 3481 264.6 1376 2516 1.10 1.24 1.35
SEM 4.3 22.2 37.5 3.8 16.7 28.5 0.02 0.01 0.02
Main effects          
 0   316.4 1789 3580a 293.5a 1417a 2629a 1.079 1.26 1.35
 45   300.1 1693 3456b 277.2ab 1369b 2550ab 1.084 1.24 1.36
 75   292.7 1707 3378b 265.5b 1338b 2473b 1.109 1.27 1.39
  0 301.4 1744 3490 278.7 1343b 2539 1.087 1.28a 1.39
  15,000 304.8 1716 3459 278.7 1406a 2563 1.095 1.23b 1.35
Sources of variation        
 RFFS 0.08 NS * ** * * NS NS NS
 Protease NS NS NS NS * NS NS * NS
 RFFS x protease NS NS NS NS NS NS NS NS NS
  1. a,bMeans bearing uncommon superscripts within a column are significantly different at NS = non-significant; *P < 0.05; **P < 0.01; FI = feed intake; BWG = body weight gain; FCR = feed conversion ratio; 1RFFS = raw full-fat soybean (SBM was replaced by RFFS at zero, 15 and 25%, equivalent to zero, 45 and 75 g/kg of diet, respectively); SEM = standard error of means. A 15000 PROT/kg = 15,000 units of protease/kg of diet, equivalent to 200 mg of protease/kg of diet