Table 2. Effects of caloric restriction and feed efficiency on growth performance

Trait	Age	Nutritional level1)		Feed efficiency2)		SEM		p-values
		Normal	Restriction	HF	LF	N	FE	N	FE
Initial BW (kg)	10	294.4	289.3	288.2	318.7	9.80	14.10	ns	ns
Medium BW (kg)	14	370.9	338.1	355.2	380.7	12.29	20.81	*	ns
Final BW (kg)	23	538.8	451.0	522.0	498.2	13.57	39.76	***	*
Daily feed intake (kg/d)	10–14	12.7	11.4	10.8	13.4	0.49	62.12	**	ns
	15–23	13.8	11.5	11.1	14.1	0.67	67.64	***	ns
	10–23	13.6	11.8	11.0	13.9	0.55	72.84	***	ns
Average daily gain (g/d)	10–14	642.9	410.1	563.0	521.0	45.44	1.06	***	ns
	15–23	604.2	405.7	594.7	425.7	36.78	1.52	***	*
	10–23	616.1	407.3	587.1	454.7	29.43	1.22	***	*
Feed efficiency (g gain/kg feed)	10–14	51.0	36.6	52.9	38.2	4.39	5.27	***	ns
	15–23	43.6	36.6	54.4	30.5	3.89	4.64	ns	**
	10–23	45.6	36.6	53.6	32.8	3.45	4.73	*	*

Steers were fed ad libitum group (n = 16) or caloric restriction group (n = 15).
Steers were assigned to groups with HF (n = 6) and LF (n = 6) regardless of nutritional level.
p < 0.05,
p < 0.01,
p < 0.001.
HF, high feed efficiency; LF, low feed efficiency; BW, body weight; N, nutritional level; FE, feed efficiency; ns, not significant.