Table 4.

Effect of RFI and SL on the final chemical composition of the empty body, carcass, and offal of Nellore bulls (n = 51)

	RFI1			SL2			FG3			P-value
	Low	High	SEM	SE	CO	SEM	Ad libitum	Restricted	SEM	RFI	SL	RFI*SL	FG
Carcass, kg	242	246	6.92	262	225	6.62	257	231	6.84	0.576	<0.01	0.515	<0.01
Offal4, kg	47.8	49.5	3.20	51.4	45.9	3.57	51.2	46.1	3.27	0.314	0.003	0.102	0.005
Carcass, % of EBW	66.1	65.8	0.488	66.3	65.4	0.489	66.2	65.5	0.511	0.511	0.007	0.200	0.018
Non-Carcass, % of EBW	33.9	34.2	0.488	33.7	34.6	0.489	33.8	34.5	0.511	0.511	0.007	0.200	0.018
Chemical composition (%)
Empty body
Water	62.1	62.2	0.321	62.6	61.7	0.326	61.8	62.4	0.370	0.737	0.044	0.181	0.203
Protein	17.4	17.7	1.34	17.7	17.4	1.35	17.5	17.5	1.34	0.280	0.319	0.033	0.944
Ether extract	15.4	15.7	1.39	14.8	16.2	1.39	15.9	15.2	1.41	0.421	0.005	0.029	0.227
Ash	4.77	4.77	0.110	4.93	4.61	0.121	4.76	4.79	0.191	0.968	0.037	0.849	0.827
Carcass
Water	59.2	59.8	1.51	59.9	59.1	1.50	59.0	60.0	1.52	0.333	0.216	0.173	0.074
Protein	18.9	18.0	0.301	18.7	18.1	0.318	18.2	18.6	0.347	0.037	0.181	0.070	0.368
Ether extract	15.5	17.0	1.27	15.4	17.0	1.29	16.8	15.6	1.31	0.080	0.066	0.090	0.137
Ash	5.86	5.91	0.389	6.04	5.73	0.386	5.94	5.82	0.377	0.835	0.188	0.647	0.607
Offal 4
Water	57.2	57.3	2.74	58.5	56.0	2.76	56.7	57.8	276	0.968	0.016	0.061	0.231
Protein	11.5	12.2	2.29	11.4	12.4	2.31	12.2	11.6	2.32	0.430	0.315	0.728	0.501
Ether extract	30.4	29.8	5.16	29.6	30.7	5.17	31.0	29.1	5.17	0.584	0.410	0.200	0.169
Ash	0.817	0.853	0.040	0.833	0.837	0.042	0.771	0.898	0.042	0.350	0.920	0.481	0.002

¹Treatments were established based on postweaning RFI.

²Selected Nellore (SE) and Control Nellore (CO) from Instituto de Zootecnia, São Paulo, Brazil Nellore breeding program.

³FG, feeding groups: restricted and ad libitum.

⁴Offal: Liver, kidney, empty gastrointestinal tract, other internal organs, tail and kidney, pelvic and heart fat.