Months Since Calving: |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
|
||||||||||||
NEmrequired (Mcal/day) |
||||||||||||
Maintenance |
10.25 |
10.25 |
10.25 |
10.25 |
10.25 |
10.25 |
8.54 |
8.54 |
8.54 |
8.54 |
8.54 |
8.54 |
Lactation |
4.78 |
5.74 |
5.17 |
4.13 |
3.10 |
2.23 |
0 |
0 |
0 |
0 |
0 |
0 |
Pregnancy |
0 |
0 |
0.01 |
0.03 |
0.07 |
0.16 |
0.32 |
0.64 |
1.18 |
2.08 |
3.44 |
5.37 |
Total |
15.03 |
15.99 |
15.43 |
14.41 |
13.42 |
12.64 |
8.87 |
9.18 |
9.72 |
10.62 |
11.98 |
13.91 |
MP required (g/day)b |
||||||||||||
Maintenance |
422 |
422 |
422 |
422 |
422 |
422 |
422 |
422 |
422 |
422 |
422 |
422 |
Lactation |
349 |
418 |
376 |
301 |
226 |
163 |
0 |
0 |
0 |
0 |
0 |
0 |
Pregnancy |
0 |
0 |
1 |
2 |
4 |
7 |
14 |
27 |
50 |
88 |
151 |
251 |
Total (g) |
771 |
840 |
799 |
725 |
652 |
592 |
436 |
449 |
472 |
510 |
573 |
673 |
Total (lb) |
1.7 |
1.9 |
1.8 |
1.6 |
1.4 |
1.3 |
1.0 |
1.0 |
1.0 |
1.1 |
1.3 |
1.5 |
Calcium required (g/day)b |
||||||||||||
Maintenance |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
Lactation |
16 |
20 |
18 |
14 |
11 |
8 |
0 |
0 |
0 |
0 |
0 |
0 |
Pregnancy |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
12 |
12 |
12 |
Total |
32 |
36 |
34 |
30 |
27 |
24 |
16 |
16 |
16 |
28 |
28 |
28 |
Phosphorus required (g/day)b |
||||||||||||
Maintenance |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
Lactation |
9 |
11 |
10 |
8 |
6 |
4 |
0 |
0 |
0 |
0 |
0 |
0 |
Pregnancy |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
5 |
5 |
5 |
Total |
22 |
24 |
23 |
21 |
19 |
17 |
13 |
13 |
13 |
18 |
18 |
18 |
Gain in weight from pregnancy/dayb |
||||||||||||
Grams |
0 |
0 |
20 |
30 |
50 |
80 |
120 |
190 |
280 |
400 |
570 |
770 |
Pounds |
0 |
0 |
0.04 |
0.07 |
0.11 |
0.18 |
0.26 |
0.42 |
0.62 |
0.88 |
1.25 |
1.70 |
Milk production/day |
||||||||||||
Kilograms |
6.7 |
8.0 |
7.2 |
5.8 |
4.3 |
3.1 |
0 |
0 |
0 |
0 |
0 |
0 |
Pounds |
14.7 |
17.6 |
15.8 |
12.8 |
9.5 |
6.8 |
0 |
0 |
0 |
0 |
0 |
0 |
Weight of conceptus |
||||||||||||
Kilograms |
0 |
0 |
1 |
1 |
3 |
4 |
7 |
12 |
19 |
29 |
44 |
64 |
Pounds |
0 |
0 |
2 |
2 |
7 |
9 |
15 |
26 |
42 |
64 |
97 |
141 |
a Mature weight, 533 kg (1,172 lb); calf birth weight, 40 kg (88 lb); age at calving, 60 mo; peak milk, 8 kg (17.6 lb); age of calf at weaning, 30 wk; breed code Angus; milk protein, 3.4%; calving interval, 12 mo; see Table: Mean Nutrient Content of Feeds Commonly Used in Beef Cattle Diets a for abbreviations. Crystalline vitamin A should be added at a level of 2,200 IU/kg (1,000 IU/lb) dry matter feed. |
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b No allowance made for gain because these are mature cows. |
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Adapted, with permission, from Nutrient Requirements of Beef Cattle, 2000, National Academy of Sciences, National Academy Press, Washington, DC. |