Table 1.

Ingredient composition of corn stalk-based diets with or without 150 mg/d of monensin fed to drylot heifers at a maintenance level of intake

Ingredient	Control	Monensin
Corn stalks, % of DM	80	80
Corn silage, % of DM	10	10
Wet distillers grains with solubles, % of DM	7	7
Supplement without monensina, % of DM	3	0
Supplement with monensinb, % of DM	0	3

^aSupplement contained on a DM basis: 25.00% CP, 3.17% ether extract, 14.49% calcium, 0.33% phosphorus, 3.99% salt, 1.64% sodium, 0.50% magnesium, 0.61% potassium, 0.26% sulfur, 41.86% ash, 0.0018 ppm cobalt, 0.4157% copper, 0.0042% iodine, 0.5164%, 0.0907% manganese, 0.0008% selenium, 0.1449% zinc, 0.0334% thiamin, 0.0070% Vitamin A (1,000,000 IU/g), and 0.1050% Vitamin E (500 IU/g).

^bSupplement contained 700 g/ton of monensin.