Table 4. The effects of CP and AA level on microbiota in growing pigs.

Variable	CP (%)				SEM	p-value
	17.2	15.7
		Lysine (%)
	1.10	1.10	1.15	1.20
Phase 1 (d 14)
Lactobacillus spp.	1.247	1.241	1.258	1.271	0.02	0.412
Bifidobacterium spp.	0.774	0.819	0.774	0.787	0.02	0.139
Escherichi coli	0.320	0.283	0.292	0.302	0.02	0.217
Clostridium	0.539	0.505	0.498	0.482	0.03	0.204
Phase 2 (d 28)
Lactobacillus spp.	1.236	1.271	1.291	1.301	0.03	0.244
Bifidobacterium spp.	0.795	0.806	0.826	0.817	0.01	0.212
Escherichi coli	0.323	0.306	0.308	0.293	0.02	0.357
Clostridium	0.515	0.500	0.498	0.494	0.02	0.619
Phase 3 (d 42)
Lactobacillus spp.	1.281	1.318	1.281	1.301	0.03	0.624
Bifidobacterium spp.	0.791	0.798	0.782	0.792	0.02	0.929
Escherichi coli	0.278	0.288	0.306	0.298	0.02	0.361
Clostridium	0.508	0.504	0.510	0.490	0.03	0.884

CP, crude protein; AA, amino acid.