Table 1. Intake nutrient requirements in pounds per day for range cows with average milk production during 12 months of production periods (data from NRC 1996).
Dry Gestation3rd TrimesterEarly LactationLactation
(Spring, Summer, Fall)
1000 lb cows
Dry matter
21
21
24
24
Energy (TDN)
9.64
10.98
14.30
13.73
Crude protein
1.30
1.64
2.52
2.30
Calcium
0.03
0.05
0.07
0.06
Phosphorus
0.02
0.03
0.05
0.04

1200 lb cows
Dry matter
24
24
27
27
Energy (TDN)
11.02
12.62
15.85
15.23
Crude protein
1.49
1.87
2.73
2.51
Calcium
0.04
0.06
0.08
0.07
Phosphorus
0.03
0.04
0.05
0.05
1400 lb cows
Dry matter
27
27
30
30
Energy (TDN)
12.42
14.28
17.40
16.71
Crude protein
1.67
2.13
2.94
2.70
Calcium
0.04
0.07
0.08
0.08
Phosphorus
0.03
0.05
0.06
0.05