Meat Production in a Feedlot System of Zebu—Holstein Steers and Heifers with Dairy Genetics: Productive and Biological Analyses

Table 4

Interaction between sex and period on the average daily gain and empty body gain (kg/d) of steers and heifers with dairy origins in a feedlot.

Sex	Period				RSD	value
	30	60	90	120		LIN	QUAD	CUB
Average daily gain
Steer	1.49^a	0.84^a	1.00^a	0.84^a	0.15	<0.001	<0.001	<0.001
Heifer	1.03^b	0.76^a	0.73^b	0.83^a	0.14	0.068	0.002	0.723
value	<0.001	0.413	0.0017	0.887
Empty body gain
Steer	1.25^a	0.99^a	1.02^a	0.82^a	0.11	<0.001	0.306	0.678
Heifer	0.85^b	0.85^a	0.72^b	0.83^a	0.13	0.055	0.012	0.543
value	<0.001	0.341	<0.001	0.211

SRD = standard error of mean; = effect of interaction between sex and period; LIN = linear effect; QUAD = quadratic effect; CUB = cubic effect.