Table 2.

Effects of DA on growth performance of finishing beef steers

	Treatment				P-value1
Item	Control	LowDA	HighDA	SEM	L	Q
Growth performance
Live body weight2, kg
Initial	468	469	468	4.1	0.99	0.89
Period 1	536	538	536	5.1	0.96	0.65
Period 2	578	594	595	6.1	0.06	0.35
Period 3	638	649	656	6.6	0.06	0.84
Final	664	671	675	7.1	0.27	0.99
ADG3, kg/d
Period 1	2.49	2.57	2.50	0.09	0.93	0.46
Period 2	1.59	2.11	2.17	0.10	0.003	0.10
Period 3	2.05	1.90	2.12	0.09	0.63	0.14
Period 4	1.13	0.96	0.99	0.09	0.28	0.37
Overall	1.82	1.87	1.95	0.05	0.09	0.81
DMI, kg
Period 1	9.96	10.22	10.02	0.51	0.94	0.72
Period 2	8.33	9.62	9.46	0.38	0.06	0.15
Period 3	9.87	10.36	10.31	0.51	0.56	0.68
Period 4	8.00	7.92	8.02	0.40	0.97	0.85
Overall	9.04	9.53	9.45	0.30	0.36	0.46
Gain:feed ratio, kg/kg
Period 1	0.252	0.249	0.255	0.014	0.96	0.96
Period 2	0.193	0.211	0.234	0.013	0.05	0.95
Period 3	0.214	0.193	0.215	0.009	0.94	0.07
Period 4	0.145	0.119	0.116	0.011	0.22	0.40
Overall	0.205	0.199	0.205	0.006	0.50	0.25

¹L, linear effects; Q, quadratic effects.

²BW were reported as shrunk weight (BW × 0.96) to compensate for gut fill.

³ADG was calculated based on shrunk BW gain (final BW – initial BW).