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

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

RFFS¹ g/kg	Protease PROT/kg	Feed intake			Body weight gain			FCR
RFFS¹ g/kg	Protease PROT/kg	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
0	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
45	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
75	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	3580^a	293.5^a	1417^a	2629^a	1.079	1.26	1.35
45		300.1	1693	3456^b	277.2^ab	1369^b	2550^ab	1.084	1.24	1.36
75		292.7	1707	3378^b	265.5^b	1338^b	2473^b	1.109	1.27	1.39
	0	301.4	1744	3490	278.7	1343^b	2539	1.087	1.28^a	1.39
	15,000	304.8	1716	3459	278.7	1406^a	2563	1.095	1.23^b	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

^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

ISSN: 2055-0391