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

Table 6 Effects of supplemental protease in diets containing graded levels of raw soybean on the weights of internal organs (g/ 100 g body weight) at day 24

RFFS¹, g/kg	Protease, PROT/kg	G + P	Pancreas	SI	Heart	Liver	Bursa	Spleen
0	0	2.74	0.21	4.04	0.58	2.49	0.19	0.08
0	15,000	2.79	0.21	4.02	0.54	2.66	0.20	0.08
45	0	3.72	0.36	5.43	0.69	3.07	0.20	0.12
45	15,000	3.58	0.35	5.77	0.74	2.76	0.28	0.10
75	0	3.40	0.37	4.97	0.66	2.58	0.18	0.09
75	15,000	3.31	0.35	4.71	0.64	2.87	0.20	0.08
SEM		0.10	0.02	0.19	0.02	0.09	0.01	0.01
Main effects
0		2.77^c	0.21^b	4.03^b	0.56^c	2.58	0.20	0.08^b
45		3.65^a	0.35^a	5.57^a	0.71^a	2.91	0.24	0.11^a
75		3.36^b	0.36^a	4.84^a	0.65^b	2.73	0.19	0.08^b
	0	3.29	0.31	4.81	0.64	2.7	0.19^b	0.09
	15,000	3.23	0.30	4.71	0.64	2.8	0.23^a	0.09
Sources of variation
RFFS		***	***	***	***	NS	NS	*
Protease		NS	NS	NS	NS	NS	*	NS
RFFS x protease		NS	NS	NS	NS	NS	NS	NS

^a,b,cMeans bearing uncommon superscripts within a column are significantly different at NS = non-significant; ***P < 0.001; *P < 0.05; 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; SI = Small intestine (jejunum, ileum and duodenum) were weighed with the contents; G + P (gizzard and proventriculus) were weighed with the contents; SEM = Pooled standard error of mean. A 15000 PROT/kg = 15,000 units of protease/kg of diet, equivalent to 200 mg of protease/kg of diet

ISSN: 2055-0391