Table 5. Effects of dietary energy and crude protein levels in the diets of gestating sows on chemical compositions of the colostrum and milk of sows

Energy CP (%)	ME 13.40 MJ /kg (%)			ME 13.82 MJ/kg (%)			SEM	p-value
	10.5	12	13.5	10.5	12	13.5		ME	CP	M × C
24 hours postpartum (%)
Casein1)	9.83	7.37	5.46	8.35	8.06	5.67	0.550	0.85	0.03	0.66
Fat	6.63	6.71	5.38	6.73	3.45	4.99	0.497	0.24	0.34	0.33
Protein1)	13.31	9.83	7.30	11.28	10.85	7.47	0.767	0.85	0.04	0.67
Lactose1)	3.42	4.08	4.28	3.65	3.95	4.54	0.146	0.68	0.06	0.82
Total solids1)	27.16	23.36	19.14	24.77	21.10	18.98	1.042	0.41	0.03	0.87
Solids-not-fat1)	16.94	13.91	11.75	14.98	14.96	12.05	0.641	0.86	0.03	0.56
Day 21 of lactation (%)
Casein	4.29	4.68	4.58	4.10	4.62	4.54	0.086	0.58	0.11	0.93
Fat	5.95	7.08	6.79	5.67	6.51	6.66	0.245	0.53	0.23	0.93
Protein	4.86	5.19	5.21	4.54	5.24	5.00	0.122	0.53	0.24	0.83
Lactose	6.04	6.37	6.11	6.50	6.12	6.38	0.067	0.22	0.98	0.10
Total solids	18.61	20.19	19.76	18.34	19.42	19.46	0.321	0.50	0.24	0.94
Solids-not-fat	11.02	11.44	11.37	10.87	11.42	11.34	0.085	0.69	0.11	0.94

Linear response (p < 0.05) to dietary CP levels when a significant CP effect was detected.
ME, metabolizable energy; CP crude protein; SEM, Standard error of means.