Table 6.

Estimates of retained energy¹ (RE) in confined beef cows fed high- and low-energy density diets at 80% or 120% of NASEM (2016) predicted energy requirement

	High-energy diet2		Low-energy diet			Probability
Model	80	120	80	120	SEM	Diet	Intake	Diet × intake
NASEM	−1.77	8.13	−8.02	0.55	5.28	0.17	0.07	0.89
Ferrell and Jenkins (1984, 1)	4.57	17.10	−0.52	8.04	5.09	0.15	0.03	0.68
Ferrell and Jenkins (1984, 2)	7.92	24.08	6.69	12.37	6.06	0.27	0.06	0.37
Gresham et al. (1986)	1.70	10.15	−4.18	3.17	5.01	0.18	0.10	0.90
Wagner et al. (1988, 1)	1.41	7.38	−2.39	2.57	3.25	0.17	0.08	0.87
Wagner et al. (1988, 2)	5.48	16.67	4.63	8.56	4.20	0.27	0.06	0.37
Wagner et al. (1988, 3)	5.62	16.59	4.53	8.56	4.17	0.26	0.06	0.38
Wagner et al. (1988, 4)	−1.97	−0.92	−7.52	−2.47	4.68	0.43	0.49	0.65

¹kcal/d/EBW^0.75, calculated as RE/d/EBW^0.75, where d = 56 days.

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