Table 5.

Experiment 2: effect of BSS and eCAN¹ on growth performance of beef heifers

	Treatment2						P-value3
Item	NCTRL	U	NIT	UB	NITB	SEM	NPN	NS	B	B × N
Initial BW4, kg	274	275	276	279	277	3.1	0.349	0.930	0.435	0.615
Final BW5, kg	335	335	342	352	332	6.7	0.470	0.384	0.600	0.048
ADG, kg
Days -28 to 0	0.87	0.80	0.97	1.07	0.80	0.139	0.794	0.729	0.731	0.125
Days 0 to 14	0.67	0.69	0.83	1.01	0.80	0.141	0.286	0.772	0.307	0.218
Days 0 to 28	0.70	0.75	0.75	0.86	0.83	0.110	0.401	0.898	0.388	0.898
Days 0 to 42	0.78	0.76	0.74	0.90	0.76	0.092	0.891	0.398	0.347	0.508
Days 0 to 56	0.65	0.69	0.68	0.74	0.55	0.061	0.865	0.125	0.545	0.139

¹eCAN = encapsulated calcium-ammonium nitrate (5Ca(NO₃)₂-NH₄NO₃) – 65.1% nitrate DM basis.

²NCTRL, treatment 2.7 g/kg BW molasses; U, NCTRL + 182 mg/kg BW urea; NIT, NCTRL + 538 mg/kg BW eCAN; UB, treatment U + 58.4 mg/kg BW BSS; NITB, treatment NIT + 58.4 mg/kg BW BSS. Groups contained 5 (NCTRL, U, NIT, UB) and 4 (NITB) experimental units. Largest SEM is provided.

³Observed significance levels for: NPN, effect of NPN, NCTRL vs. the mean of U + NIT + UB + NITB; NS, effect of NPN source (excludes NCTRL); B, effect of BSS (excludes NCTRL); B × N, interaction of BSS and NPN source (excludes NCTRL).

⁴Initial BW was the average of BW recorded on days −28 and −27.

⁵Final BW was the average of BW recorded on days 55 and 56.