Table 4. Digestible nutrient concentrations (g/kg) of experimental diets (dry matter basis)

Variable	ME			NE			SEM	p-value
	LE	C	HE	LE	C	HE		S	L	S × L
DCP	152	153	156	150	152	156	3.04	0.64	0.09	0.97
DEE	51	60	71	55	62	70	1.82	0.16	< 0.0001	0.15
DAEE	36	47	54	38	47	54	2.93	0.71	< 0.0001	0.75
DOM	831	842	833	850	846	832	14.85	0.39	0.54	0.58
DADF	26	34	30	31	35	29	3.26	0.40	0.04	0.47

ME, metabolizable energy system; NE, net energy system; LE, low energy level; C, control energy level; HE, high energy level; S, energy system effect; L, energy level effect; S × L, interaction between the energy system and energy level; DCP, digestible crude protein; DEE, digestible ether extract (DEE concentrations were calculated using the amounts of feed EE and fecal AEE); DAEE, digestible acid-hydrolyzed ether extract; DOM, digestible organic matter; DADF, digestible acid detergent fiber.