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

Table 7.

Nitrogen intake and excretion 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
N intake g/d
Control	82.2^a	92.4^b	103.0^b	3.97	0.94	<0.01
Monensin	81.2^a	97.3^b	99.9^b	3.72
N excretion, g/d
Feces
Control	50.6^a	43.5^a	76.5^b	3.97	0.13	<0.01
Monensin	44.9^a	40.1^a	71.5^b	3.71
Urine
Control	30.4^a	34.7^a	45.1^b	2.80	0.16	<0.01
Monensin	33.5^a	33.5^a	50.6^b	2.65
Total
Control	81.0^a	78.3^a	121.8^b	4.58	0.46	<0.01
Monensin	78.4^a	73.6^a	122.1^b	4.30
Apparent N digested, g/d
Control	31.6^a	48.9^b	25.9^a	6.11	0.17	<0.01
Monensin	36.3^a	57.2^b	28.4^a	5.78
N retained, g/d
Control	1.2^a	14.2^b	−19.3^c	5.89	0.43	<0.01
Monensin	2.9^a	23.7^b	−22.2^c	5.59

^aNo treatment × day interactions present (P ≥ 0.58).

^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).