Table 7.

Estimates of heat production¹ (HE) in confined beef cows fed high- and low-energy density diets at 80% or 120% of NRC (2016) predicted energy requirement

	High-energy diet2		Low-energy diet			Probability
Model	80	120	80	120	SEM	Diet	Intake	Diet × intake
NASEM	109.39	140.63	147.69	188.28	5.48	<0.01	<0.01	0.37
Ferrell and Jenkins (1984, 1)	103.04	131.66	140.20	180.79	5.81	<0.01	<0.01	0.28
Ferrell and Jenkins (1984, 2)	99.70	124.68	132.99	176.46	7.39	<0.01	<0.01	0.20
Gresham et al. (1986)	105.91	138.61	143.86	185.66	5.11	<0.01	<0.01	0.35
Wagner et al. (1988, 1)	106.21	141.38	142.07	186.26	3.86	<0.01	<0.01	0.23
Wagner et al. (1988, 2)	102.13	132.09	135.05	180.26	5.72	<0.01	<0.01	0.17
Wagner et al. (1988, 3)	101.99	132.17	135.15	180.27	5.68	<0.01	<0.01	0.17
Wagner et al. (1988, 4)	109.58	149.68	147.20	191.29	4.29	<0.01	<0.01	0.62

¹kcal/d/EBW^0.75, calculated as (ME − RE)/d/EBW^0.75, where d = 52 days.

²Formulated NE_m concentrations for high- and low-energy diets were 1.54 and 1.08 Mcal/kg, respectively.