Table 1.

Ingredient and analyzed chemical composition of diets fed during close-up (-30 d to calving) and early lactation (1 to 30 d in milk)

Componenta	Far-off	Close-up	Early lactation
Ingredient, % of DM
Alfalfa silage	12.2	7.6	4.9
Alfalfa hay	-	3.5	3.9
Corn silage	33.6	38.9	33.1
Wheat straw	34.8	8.4	2.6
Cottonseed	-	-	3.9
Wet brewers grains	-	6.1	9.4
Ground shelled corn	4.9	18.8	22.6
Soy hulls	2.0	4.1	3.9
Soybean meal, 48% CP	8.9	3.0	5.6
Expeller soybean mealb	-	0.7	0.2
SoyChlorc	0.2	2.3	-
Blood meal 85% CP	1.0	0.6	0.3
Molasses	-	0.4	-
Urea	0.3	-	0.7
Rumen-inert fatd	-	-	2.0
Limestone	0.8	2.2	1.6
Salt (plain)	0.3	-	0.3
Ammonium chloride	-	1.14	-
Dicalcium phosphate	0.1	0.3	0.4
Magnesium oxide	-	0.1	0.1
Magnesium sulfate	0.2	1.4	0.3
Sodium bicarbonate	-	-	0.7
Calcium sulfate	-	-	0.1
Mineral-vitamin mixe	0.2	0.2	0.2
Vitamin Af	0.02	0.03	0.04
Vitamin Dg	0.01	0.02	0.02
Vitamin Eh	0.36	0.36	0.20
Chemical analysis
NEL, Mcal/kg DM	1.25	1.59	1.67
CP, % DM	14.4	14.3	18.7
NDF, % DM	53.0	39.1	35.9
ADF, % DM	34.5	23.9	22.2
Zn, mg/kg of DM	103	83	69
Mn, mg/kg of DM	84	76	70
Cu, mg/kg of DM	15.5	14.4	12.3
CO, mg/kg of DM	0.83	0.72	0.19

^aBasal close up and lactation diets were considered as basal diet plus

inorganic trace minerals, or basal diet plus organic trace minerals

^bSoyPLUS (West Central Soy, Ralston, IA)

^cSoyChlor (West Central Soy)

^dEnergy Booster 100 (MSC, Carpentersville, IL)

^eContained a minimum of 4.3% Mg, 8% S, 6.1% K, 2.0% Fe, 3.0% Zn,

3.0% Mn, 5,000 mg/kg of Cu, 250 mg/kg of I, 40 mg/kg of Co, 150

mg/kg of Se, 2,200 kIU/kg of vitamin A, 660 kIU/kg of vitamin D₃,

and 7,700 IU/kg of vitamin E

^fContained 30,000 kIU/kg

^gContained 5,009 kIU/kg

^hContained 44,000 IU/kg