. 2018 Apr 2;96(3):1171–1180. doi: 10.1093/jas/skx030

Table 6.

Daily energy partitioning of drylot heifers receiving corn stalk-based diets with or without 150 mg/d of monensin at a maintenance level of intake

Item	Day of study			SEM^e	Probability^a
Item	14^b	42^c	161^d	SEM^e	Treatment	Day
GE intake, Mcal
Control	23.80^a	20.71^b	32.54^c	0.641	0.91	<0.01
Monensin	23.48^a	21.84^b	31.95^c	0.612
Fecal energy loss, Mcal
Control	12.72^a	10.85^b	15.39^c	0.523	0.91	<0.01
Monensin	12.52^a	10.87^b	15.43^c	0.494
Fecal energy loss, % of GE intake
Control	53.5^a	52.4^a	47.4^b	1.595	0.60	<0.01
Monensin	53.2^a	49.8^a	48.2^b	1.494
DE intake, Mcal
Control	11.08^a	9.86^a	17.12^b	0.482	0.75	<0.01
Monensin	10.96^a	10.97^a	16.53^b	0.490
DE, % of GE intake
Control	46.52^a	47.63^b	52.56^b	1.493	0.60	<0.01
Monensin	46.76^a	50.22^b	51.80^b	1.489
Urine energy, Mcal
Control	1.11^a	0.97^a	1.32^b	0.069	0.28	<0.01
Monensin	1.05^a	0.88^a	1.33^b	0.069
Urine energy, % of GE intake
Control	4.72	4.73	4.46	0.293	0.26	0.28
Monensin	4.46	4.05	4.19	0.293
CH₄ energy, Mcal
Control	1.61^a	1.53^b	1.76^a	0.082	0.78	0.01
Monensin	1.51^a	1.55^b	1.77^b	0.082
CH₄ energy, % of GE intake
Control	6.7^a	7.4^b	5.4^c	0.302	0.57	<0.01
Monensin	6.4^a	7.1^b	5.5^c	0.281
ME intake, Mcal
Control	8.36^a	7.36^b	14.03^c	0.474	0.58	<0.01
Monensin	8.41^a	8.55^b	13.42^c	0.443
ME, % of GE intake
Control	35.07^a	33.53^a	43.06^b	1.191	0.42	<0.01
Monensin	35.88^a	39.09^b	42.08^b	1.684
ME:DE
Control	0.75^a	0.74^a	0.82^b	0.022	0.22	<0.01
Monensin	0.77^a	0.77^a	0.81^b	0.017
HP, Mcal
Control	11.58^a	10.99^b	14.71^c	0.454	0.18	<0.01
Monensin	12.31^a	11.94^b	15.20^c	0.454
HP, % of GE intake
Control	48.9^a	53.2^b	45.3^c	1.771	0.16	<0.01
Monensin	52.4^a	54.7^b	47.7^c	1.667
RE, Mcal
Control	−3.22^a	−3.64^a	−0.67^b	0.696	0.36	<0.01
Monensin	−3.90^a	−3.40^a	−1.78^b	0.651
RE, % of GE intake
Control	−13.80^a	−17.70^a	−2.17^b	2.635	0.56	<0.01
Monensin	−16.48^a	−15.56^a	−5.63^b	2.635

^aNo treatment × day interactions present (P ≥ 0.12).

^b,c,dCorresponds with 71, 94, and 213 d of pregnancy, respectively.

^ePooled SE of least squares means (control n = 7; monensin n = 8).

^a,b,cWithin a row, means across days without a common superscript differ (P ≤ 0.05).