Table 2.

Effect of different grain inclusion (GI) rates in diets provided to early-weaned calves and steroidal implants (SI) utilization on the growth performance of beef steers

Item	Treatmenta				SEMb	P-values
	Hi/Imp	Hi/NI	Lo/Imp	Lo/NI		GI	SI	GI*SI
n	30	30	31	30
BW, kg
Initial BW	157	160	158	163	4.8	0.50	0.36	0.78
Finishingc	306	313	310	314	4.3	0.45	0.16	0.66
Final BW	616	619	627	622	10.5	0.33	0.90	0.62
ADGd, kg/d
Backgrounding	1.55	1.56	1.63	1.62	0.05	0.16	0.96	0.83
Finishing	1.61	1.54	1.65	1.59	0.05	0.25	0.10	0.92
Overall	1.37	1.35	1.41	1.38	0.04	0.25	0.54	0.86
DMIe, kg/d	10.1	9.9	10.3	10.2	0.25	0.25	0.80	0.84
G:Ff	0.161	0.155	0.160	0.157	<0.01	0.89	0.17	0.77
DOF to harvestg	198	200	197	192	5	0.50	0.62	0.68

Significance was declared at P ≤ 0.05; and tendencies were declared at P > 0.05 and P ≤ 0.10.

^a,bWithin a row, means without a common superscript differ.

^aSteers fed early weaning diets with greater inclusion rate of grain with (Hi/Imp) or without (Hi/NI) being subsequently implanted, and steers fed early weaning diets with lesser inclusion rate of grain with (Lo/Imp) or without (Lo/NI) being subsequently implanted.

^bPooled standard error of treatments means.

^cBody weight of steers at the beginning of the finishing phase.

^dAverage daily gain.

^eDry matter intake.

^fGain-to-feed ratio.

^gDays on feed in the finishing phase required to reach harvesting target.