Table 2.

Effect of AI or NS breeding and RNG or MDW grazing on feedlot performance of calf-feds¹

	Treatment					P-value2
	AI-MDW	AI-RNG	NS-MDW	NS-RNG	SEM	BRD	GRZ	B × G	JDOB
Initial 78 d of feeding
n	24	18	32	30
Arrival BW, kg	272	260	272	242	7.26	0.21	<0.01	0.11	<0.01
Initial BW3, kg	321a	313a	324a	280b	8.64	0.10	<0.01	0.01	0.02
ADG, kg/d	1.92	2.09	1.89	1.89	0.06	0.04	0.12	0.11	-
DMI, kg/d	10.6	10.9	9.71	9.48	0.36	<0.01	0.83	0.36	-
G:F	0.177	0.183	0.193	0.198	0.008	0.01	0.40	0.95	-
Last 105 d of feeding
n	17	10	24	24
Reimplant BW, kg	470a	476a	458a	413b	10.9	<0.01	0.04	<0.01	-
ADG, kg/d	1.51	1.64	1.63	1.56	0.07	0.69	0.62	0.10	-
DMI, kg/d	10.4	10.4	10.6	10.3	0.36	0.98	0.55	0.66	-
G:F	0.144b	0.159a	0.156a	0.153ab	0.006	0.73	0.24	0.08	-

^abMeans within a row lacking a common superscript differ (P < 0.10).

¹Calves entered feedlot 2 wk after weaning.

²BRD = breeding treatment main effect; GRZ = grazing treatment main effect; B × G = breeding × grazing treatment interaction; JDOB = calf Julian date of birth included in model when significant (P < 0.10).

³Calf weight at the start of finishing diet.