Table 2.

Intake and total tract apparent digestibility of nutrients in rumen-cannulated Bos indicus Nellore steers receiving a forage-based diets supplemented or not (CON, n = 8) with narasin (NAR, n = 8), lasalocid (LAS; n = 8), or virginiamycin (VRM; n = 8) for 140 days (Exp. 1)

	Treatments1					P-value2
Item	CON	NAR	LAS	VRM	SEM	Treatment	Period	T × P
Intake, kg/d
Dry matter	6.50	6.99	6.61	6.62	1.28	0.46	<0.01	0.65
Organic matter	5.77	6.37	5.95	5.97	1.27	0.33	<0.01	0.32
Neutral detergent fiber	4.17	4.49	4.24	4.27	0.82	0.43	<0.01	0.57
Acid detergent fiber	2.20	2.42	2.24	2.25	0.48	0.31	<0.01	0.71
Crude protein	0.75	0.82	0.77	0.77	0.14	0.33	<0.01	0.49
Digestibility, % (dry matter basis)
Dry matter	54.94	57.29	55.76	55.35	1.12	0.48	<0.01	0.36
Organic matter	56.99	59.21	57.84	57.48	1.17	0.36	<0.01	0.88
Neutral detergent fiber	61.49	64.18	62.67	61.79	1.15	0.34	<0.01	0.73
Acid detergent fiber	60.84	62.41	60.93	60.48	1.29	0.72	<0.01	0.51
Crude protein	55.79	57.94	57.71	57.87	1.16	0.48	<0.01	0.82

¹CON, no feed additives; NAR, inclusion of 13 mg/kg of dry matter of narasin (Zimprova; Elanco Animal Health, São Paulo, SP, Brazil); LAS, inclusion of 20 mg/kg of dry matter of lasalocid (Taurotec; Zoetis, Sao Paulo, SP, Brazil; n = 8); VRM, inclusion of 20 mg/kg of dry matter of virginiamycin (V-Max; Phibro Animal Health Corporation, Guarulhos, SP, Brazil; n = 8).

² P-value for treatment, period, and treatment × period interaction (T × P).