Effect of Bacillus subtilis and Bacillus licheniformis supplementation in diets with low- and high-protein content on ileal crude protein and amino acid digestibility and intestinal microbiota composition of growing pigs

Table 5 Standardized ileal digestibility of crude protein and amino acids of the assay diets^a

	High-protein		Low-protein		SEM	P-value
Item	-	+	-	+	SEM	P¹	B²	P × B³
Crude protein	82.1	81.3	87.8	83.9	2.09	0.063	0.274	0.488
Indispensable amino acids
Arginine	88.5	87.9	91.3	88.7	1.35	0.210	0.254	0.474
Histidine	84.5	83.4	88.4	84.9	1.70	0.128	0.187	0.492
Isoleucine	84.0	83.3	88.8	85.2	1.96	0.110	0.289	0.474
Leucine	84.3	83.5	88.0	84.7	1.73	0.164	0.255	0.472
Lysine	87.5	87.0	91.1	87.8	1.38	0.126	0.192	0.333
Methionine	91.9	91.5	94.3	92.0	1.03	0.166	0.201	0.363
Phenylalanine	82.2	81.7	86.9	83.6	1.99	0.112	0.348	0.474
Threonine	83.3	82.4	88.5	84.1	2.09	0.114	0.212	0.410
Tryptophan	80.3	78.4	85.0	80.3	2.47	0.195	0.202	0.584
Valine	84.2	83.2	89.0	85.0	1.93	0.106	0.218	0.436
Dispensable amino acids
Alanine	76.9	75.2	83.9	79.0	2.66	0.056	0.232	0.549
Aspartic acid	79.3	78.2	85.0	80.7	2.32	0.094	0.259	0.509
Cystine	80.7	78.9	87.5	82.5	2.33	0.037	0.166	0.499
Glutamic acid	89.5	88.8	93.1	90.8	1.22	0.034	0.242	0.539
Glycine	76.8	74.8	85.3	78.7	2.91	0.045	0.159	0.436
Proline	91.4	90.1	96.8	93.2	1.64	0.018	0.158	0.486
Serine	84.1	82.6	89.6	85.6	2.10	0.055	0.209	0.547

¹ P-value of protein level
² P-value of probiotic supplementation with Bacillus spp.
³ P-value of interaction between protein level and probiotic supplementation with Bacillus spp.
^aLS means and standard error of the means, %

ISSN: 2049-1891