Table 2.

Effect of lactation period on diversity at the phylum level in the fecal bacterial community

Phyla	Stage		SEM	P value
	Fresh1d	Fresh14d
Firmicutes	66.70	60.68	0.06	0.010
Bacteroidetes	25.38	33.93	1.52	0.008
Proteobacteria	2.73	0.46	0.01	0.003
Saccharibacteria	1.30	0.78	< 0.01	0.025
Spirochaetae	1.21	1.32	< 0.01	0.780
Actinobacteria	1.08	1.51	0.91	0.067
Verrucomicrobia	0.54	0.26	< 0.01	0.067
Tenericutes	0.52	0.84	< 0.01	0.003
Cyanobacteria	0.32	0.09	0.09	0.013
Fibrobacteres	0.09	0.10	0.05	0.380

Fresh1d indicates fecal microbiota samples from cows on d1, Fresh14d indicates fecal microbiota samples from cows on d14