Nutrient Requirements of Growing and Finishing Beef Cattle a
|
Body Weight in kg (lb) |
200 (440) |
250 (550) |
300 (660) |
350 (770) |
400 (880) |
450 (990) |
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Maintenance requirement |
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|
NEm (Mcal/day) |
4.1 |
4.84 |
5.55 |
6.23 |
6.89 |
7.52 |
|
MP (g/day) |
202 |
239 |
274 |
307 |
340 |
371 |
|
Calcium (g/day) |
6 |
8 |
9 |
11 |
12 |
14 |
|
Phosphorus (g/day) |
5 |
6 |
7 |
8 |
10 |
11 |
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Growth requirement (Average daily gain in kg [lb]) |
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|
NEg required for gain (Mcal/day) |
|
|
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|
0.5 (1.1) |
1.27 |
1.50 |
1.72 |
1.93 |
2.14 |
2.33 |
|
1.0 (2.2) |
2.72 |
3.21 |
3.68 |
4.13 |
4.57 |
4.99 |
|
1.5 (3.3) |
4.24 |
5.01 |
5.74 |
6.45 |
7.13 |
7.79 |
|
2.0 (4.4) |
5.81 |
6.87 |
7.88 |
8.84 |
9.77 |
10.68 |
|
2.5 (5.5) |
7.42 |
8.78 |
10.06 |
11.29 |
12.48 |
13.64 |
|
MP required for gain (g/day) |
|
|
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|
0.5 (1.1) |
154 |
155 |
158 |
157 |
145 |
133 |
|
1.0 (2.2) |
299 |
300 |
303 |
298 |
272 |
246 |
|
1.5 (3.3) |
441 |
440 |
442 |
432 |
391 |
352 |
|
2.0 (4.4) |
580 |
577 |
577 |
561 |
505 |
451 |
|
2.5 (5.5) |
718 |
721 |
710 |
687 |
616 |
547 |
|
Calcium required for gain (g/day) |
|
|
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|
0.5 (1.1) |
14 |
13 |
12 |
11 |
10 |
9 |
|
1.0 (2.2) |
27 |
25 |
23 |
21 |
19 |
17 |
|
1.5 (3.3) |
39 |
36 |
33 |
30 |
27 |
25 |
|
2.0 (4.4) |
52 |
47 |
43 |
39 |
35 |
32 |
|
2.5 (5.5) |
64 |
59 |
53 |
48 |
43 |
38 |
|
Phosphorus required for gain (g/day) |
|
|
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|
0.5 (1.1) |
6 |
5 |
5 |
4 |
4 |
4 |
|
1.0 (2.2) |
11 |
10 |
9 |
8 |
8 |
7 |
|
1.5 (3.3) |
16 |
15 |
13 |
12 |
11 |
10 |
|
2.0 (4.4) |
21 |
19 |
18 |
16 |
14 |
13 |
|
2.5 (5.5) |
26 |
24 |
22 |
19 |
17 |
15 |
|
a Weight at small marbling, 533 kg (1,173); weight range, breed code Angus; see Table: Mean Nutrient Content of Feeds Commonly Used in Beef Cattle Diets a for abbreviations. The concentration of vitamin A in all diets for finishing steers and heifers is 2,200 IU/kg (1,000 IU/lb) dry diet. |
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Adapted, with permission, from Nutrient Requirements of Beef Cattle, 2000, National Academy of Sciences, National Academy Press, Washington, DC. |
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