Table 4. Twelve-month nutrient requirements for 1200-pound range cows with calf birth dates in January.
Dry Gestation
3rd Trimester
Early Lactation

Lactation


Ration

Pasture

Ration

Pasture

Ration

Pasture

Ration
Spring
Pasture
Summer
Pasture
Fall
Pasture
Days
90
32
75
31
137
Daily Requirements in Pounds
Dry Matter
24
27
27
Energy (TDN)
12.62
15.85
15.23
Crude Protein
1.87
2.73
2.51
Calcium
0.06
0.08
0.07
Phosphorus
0.04
0.05
0.05
Production Period Requirements in Pound
Dry Matter
2160
864
2025
837
3699
Energy (TDN)
1135.80
507.20
1142.25
472.13
2086.51
Crude Protein
168.30
87.36
188.25
77.81
343.87
Calcium
5.40
2.56
5.25
2.17
9.59
Phosphorus
3.60
1.60
3.75
1.55
6.85
12-Month Requirements in Pound

Totals for
Rations

Totals for
Pastures

Totals for
12 Months

Dry Matter
5049
4536
9585
Energy (TDN)
2785.25
2558.64
5343.89
Crude Protein
443.91
421.68
865.59
Calcium
13.21
11.76
24.97
Phosphorus
8.95
8.40

17.35