. 2019 Jul 12;3(4):1492–1501. doi: 10.1093/tas/txz116

Table 5.

Effects of weaning date¹ and winter grazing² treatment applied to dam on steer progeny growth, feedlot performance, and carcass characteristics

	October				December					P-value
Item	WR0	WR1	WR2	CR	WR0	WR1	WR2	CR	SEM	Wean	Winter	W×W
Initial BW, kg	239^cd	255^ab	246^bc	266^a	225^d	226^d	245^bc	241^c	7	<0.01	<0.01	0.03
DMI³, kg/d	10.5	10.4	10.3	10.8	10.4	10.2	10.6	10.5	0.2	0.31	0.12	0.09
ADG, kg/d	1.72	1.68	1.73	1.76	1.70	1.71	1.78	1.79	0.05	0.37	0.07	0.81
G:F	0.164	0.161	0.169	0.163	0.164	0.168	0.168	0.171	0.004	0.07	0.33	0.27
HCW, kg	375^bc	380^abc	380^abc	397^a	364^c	365^c	386^ab	385^ab	11	0.09	0.01	0.38
LM area, cm²	89.0	89.6	90.6	92.3	87.8	87.3	91.0	89.5	2.0	0.19	0.21	0.76
FT⁴, cm	1.38^ab	1.52^ab	1.40^ab	1.47^ab	1.13^c	1.34^bc	1.38^ab	1.55^a	0.14	0.09	0.01	0.11
Marbling⁵	496	502	475	498	481	515	493	495	19	0.73	0.30	0.64
Yield grade⁶	2.88	3.00	2.82	2.91	2.65	2.77	2.79	3.07	0.29	0.35	0.25	0.31

¹Weaning occurred in October or December.

²Winter nutritional treatments: range without supplement (WR0), winter range with 0.45 kg DM/d 32% CP supplement (WR1), winter range with 0.91 kg DM/d 32% CP supplement (WR2), corn residue without supplement (CR).

³Adjusted for BW in yr 1 and 2, actual in yr 3 and 4.

⁴12th rib fat thickness.

⁵Marbling: Small⁰⁰ = 400, Small⁵⁰ = 450, Modest⁰⁰ = 500.

⁶USDA yield grade.

^abcdWithin a row, means lacking a common superscript letter differ (P < 0.05).