Table 6
Effects of dietary energy and protein levels on nutrient digestibility and nitrogen retention in growing · finishing pigs¹

Criteria	Treatments3					SEM2	P-value
	ME 3,265	ME 3,365	CON	P4(P5)	LP5		E	P	E×P
Nutrient digestibility, %
Dry matter	90.33	90.44	90.63	90.21	90.31	0.233	0.84	0.79	0.78
Crude protein	87.60	87.53	88.70	87.20	86.80	0.409	0.99	0.19	0.46
Crude ash	60.52	59.35	59.55	58.19	62.06	1.078	0.61	0.38	0.64
Crude fat	71.00B	76.80A	77.45	71.94	72.33	1.358	0.02	0.12	0.28
N-retention, g/d
N-intake	116.99	117.37	127.04	114.70	109.82	1.832
N-feces	14.43	14.53	14.35	14.69	14.40	0.460	0.93	0.96	0.48
N-urine	71.25	70.69	81.55A	71.69A	59.68B	2.628	0.89	0.01	0.58
N-retention4	31.31	32.16	31.14	28.32	35.75	2.175	0.82	0.26	0.65
N-retention5, %	27.02	27.49	24.51b	24.68ab	32.57a	1.747	0.88	0.08	0.67