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)

 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 meal^b

-

0.7

0.2

 SoyChlor^c

0.2

2.3

-

 Blood meal 85% CP

1.0

0.6

0.3

 Molasses

-

0.4

-

 Urea

0.3

-

0.7

 Rumen-inert fat^d

-

-

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 mix^e

0.2

0.2

0.2

 Vitamin A^f

0.02

0.03

0.04

 Vitamin D^g

0.01

0.02

0.02

 Vitamin E^h

0.36

0.36

0.20

 NE_L, 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