. 2021 May 5;99(7):skab147. doi: 10.1093/jas/skab147

Table 3.

Energetic losses by steers offered low-quality forage and provided supplemental protein

Item	CON¹	CSM¹	DDGS¹	SEM²
GEI, Mcal/d
Forage	19.11^a	26.13^b	25.04^b	1.07
Supplement	0.37^a	4.23^b	6.25^c	0.105
Greenfeed pellets	3.74^a	3.31^b	3.53^ab	0.108
Total GEI, Mcal/d	23.22^a	33.67^b	34.82^b	1.24
Fecal energy, Mcal/d	9.99^a	14.84^b	14.39^b	0.65
Digestible energy intake, Mcal/d	13.22^a	18.83^b	20.43^c	0.721
Digestible energy, % of GE	57.52	56.05	59.00	1.100
DE, Mcal/kg of DM	2.87	2.77	2.95	0.086
Metabolic CO₂ production, g/d	4,963^a	5,632^b	5,573^b	229.6
Ruminal CH₄ production, g/d	175.4^a	211.7^c	196.9^b	10.1
Methane energy, Mcal/d	2.33^a	2.80^c	2.61^b	0.074
Methane energy, % of GE (Y_m)	10.53^a	8.46^b	7.66^c	0.365

¹Treatments were: CON, no protein supplement; CSM, CSM at 0.29% of BW daily; DDGS, DDGS + urea supplemented at 0.41% of BW daily.

²Pooled SE of the treatment means.

^a–cWithin a row, means with unlike superscripts differ P < 0.05.