Table 3.

Effects of ABVista yeast (S. cerevisiae) on growth performance of natural-program beef steers fed steam-flaked corn-based finishing diets

Item	Treatment			SEMa	P-values*
	CTL	LY	HY		Linear	Quadratic	Contrast
Initial BW, kg	342	341	342	7.03	0.80	0.56	0.61
Adj. FSBW, kgb	574	578	574	12.56	1.00	0.67	0.83
ADG, kg
days 0–35	1.57	1.67	1.66	0.062	0.25	0.43	0.17
days 0–70	1.44	1.49	1.44	0.047	0.97	0.37	0.63
days 0–105	1.46	1.51	1.49	0.039	0.54	0.35	0.32
days 0–140	1.34	1.34	1.36	0.039	0.81	0.76	0.96
days 0–183	1.32	1.35	1.29	0.041	0.60	0.37	0.99
day 0-end	1.19	1.21	1.18	0.033	0.76	0.49	0.93
Adj. 0-endc	1.18	1.20	1.19	0.036	0.89	0.65	0.73
DMI, kg/d
days 0–35	7.42	7.46	7.48	0.064	0.46	0.89	0.48
days 0–70	7.90	7.97	7.91	0.093	0.95	0.60	0.75
days 0–105	8.31	8.28	8.33	0.093	0.84	0.77	0.98
days 0–140	8.27	8.22	8.42	0.122	0.30	0.29	0.71
days 0–183	8.36	8.32	8.50	0.255	0.44	0.46	0.76
day 0-end	8.46	8.39	8.48	0.239	0.92	0.61	0.86
G:F
days 0–35	0.211	0.224	0.222	0.008	0.29	0.38	0.18
days 0–70	0.182	0.187	0.181	0.005	0.90	0.34	0.70
days 0–105	0.176	0.183	0.178	0.004	0.53	0.10	0.18
days 0–140	0.163	0.163	0.160	0.004	0.62	0.74	0.79
days 0–183	0.158	0.163	0.152	0.004	0.20	0.08	0.81
day 0-end	0.141	0.144	0.139	0.003	0.58	0.17	0.83
Adj. 0-endc	0.139	0.143	0.140	0.003	0.93	0.33	0.57

^aStandard error of the mean, n = 12 pens per treatment.

^bCarcass-adjusted FSBW was calculated from HCW divided by the average dressing percent across treatments (63.01%) and adjusted by a 4% shrink.

^cCarcass-adjusted ADG and G:F were calculated from carcass-adjusted final shrunk BW, initial BW, and days on feed. Days on feed were 183 (n = 12 pens) and 204 (n = 24 pens).

*P-values for the linear, quadratic, and contrast (control vs. the average of the yeast treatments) effects of yeast dose (CTL = 0; LY = 1.33; and HY = 2.66 g of live yeast per steer daily).