Table 6.

Influence of feeding system, dietary adaptation period, and direct-fed microbial supplementation on plasma glucose and urea N concentrations (mM) by day

Item	Feeding system
	Conventionally fed				Naturally fed
	14 d		28 d		14 d		28 d			P-values2
	−DFM1	+DFM	−DFM	+DFM	−DFM	+DFM	−DFM	+DFM	SEM3	Syst	Adapt	DFM	Syst × Adapt	Syst × DFM	Adapt × DFM	Syst × Adapt × DFM
Glucose
Day 28	5.59	5.77	5.71	5.04	5.69	5.67	5.54	5.85	0.266	0.39	0.42	0.79	0.38	0.28	0.47	0.11
Day 56	6.34	5.81	6.00	5.56	6.56	6.51	5.80	5.70	0.245	0.20	0.002	0.10	0.15	0.22	0.95	0.83
Day 84	6.04	6.25	5.72	5.79	6.91	6.27	6.04	6.41	0.285	0.02	0.07	0.99	0.96	0.49	0.28	0.15
Day 112	6.57	6.51	7.83	6.04	7.11	7.43	7.19	6.35	0.359	0.26	0.84	0.02	0.07	0.18	0.004	0.56
Day 140	6.84	6.24	6.10	6.16	6.54	6.58	5.67	6.20	0.328	0.70	0.03	0.98	0.64	0.24	0.22	0.86
Urea N
Day 28	7.85	7.18	7.15	8.87	9.09	7.09	7.59	7.60	0.416	0.78	0.99	0.40	0.09	0.009	<0.001	0.73
Day 56	9.78	9.34	9.10	9.32	12.30	10.27	10.32	10.56	0.462	<0.001	0.06	0.12	0.43	0.22	0.02	0.20
Day 84	14.0	12.4	13.8	12.3	13.3	13.7	13.2	12.4	0.48	0.93	0.20	0.01	0.44	0.04	0.37	0.30
Day 112	12.2	13.4	14.8	13.7	12.4	13.2	13.2	13.7	0.72	0.38	0.04	0.39	0.48	0.52	0.18	0.34
Day 140	12.4	12.8	11.6	11.5	14.1	11.8	13.9	11.5	0.48	0.02	0.05	0.002	0.25	<0.001	0.65	0.76

¹Direct-fed microbial.

²Sys = conventionally fed vs. naturally fed; Adapt = 14 vs. 28 d; DFM = −DFM vs. +DFM.

³Standard error of the mean for the feeding system × Adapt × DFM interaction.