|
Table 4. Requirements of Lactating Cows, First 3-4 Mos. After Calving
| |
|
TDN |
Crude Protein |
Calcium |
Phosphorus |
Vitamin A |
Cow
Wt lb. |
Max
Daily
DM lb. |
lb./day |
% DM |
lb./day |
% DM |
g/day |
% DM |
g/day |
% DM |
IU/day |
IU/lb. |
| Average Milking Ability (10-12 lb./day) |
| 770 |
25 |
9.7 |
52 |
1.65 |
9.2 |
24 |
.29 |
24 |
.29 |
19,000 |
1775 |
| 880 |
27 |
10.4 |
52 |
1.79 |
9.2 |
25 |
.28 |
25 |
.28 |
21,000 |
1775 |
| 990 |
29 |
11.0 |
52 |
1.90 |
9.2 |
26 |
.28 |
26 |
.28 |
23,000 |
1775 |
| 1100 |
31 |
11.7 |
52 |
1.98 |
9.2 |
27 |
.28 |
27 |
.28 |
24,000 |
1775 |
| 1210 |
33 |
12.3 |
52 |
2.14 |
9.2 |
28 |
.27 |
28 |
.27 |
26,000 |
1775 |
| 1320 |
35 |
13.0 |
52 |
2.23 |
9.2 |
28 |
.25 |
28 |
.25 |
27,000 |
1775 |
| 1430 |
37 |
13.7 |
52 |
2.32 |
9.2 |
29 |
.25 |
29 |
.25 |
29,000 |
1775 |
| 1540 |
39 |
14.4 |
52 |
2.41 |
9.2 |
30 |
.25 |
30 |
.25 |
31,000 |
1775 |
| Avg. |
32 |
12.0 |
52 |
2.05 |
9.2 |
27 |
.27 |
27 |
.27 |
25,000 |
1775 |
| Superior Milking Ability (21-23 lb./day) |
| 770 |
30 |
12.8 |
55 |
2.45 |
10.9 |
45 |
.44 |
40 |
.39 |
32,000 |
1775 |
| 880 |
32 |
13.5 |
55 |
2.58 |
10.9 |
45 |
.42 |
41 |
.38 |
34,000 |
1775 |
| 990 |
34 |
14.1 |
55 |
2.71 |
10.9 |
45 |
.40 |
42 |
.37 |
36,000 |
1775 |
| 1100 |
36 |
14.8 |
55 |
2.84 |
10.9 |
46 |
.39 |
43 |
.36 |
38,000 |
1775 |
| 1210 |
38 |
15.4 |
55 |
2.98 |
10.9 |
46 |
.37 |
44 |
.35 |
41,000 |
1775 |
| 1320 |
40 |
16.1 |
55 |
3.11 |
10.9 |
46 |
.36 |
44 |
.34 |
43,000 |
1775 |
| 1430 |
42 |
16.8 |
55 |
3.22 |
10.9 |
47 |
.35 |
45 |
.33 |
45,000 |
1775 |
| 1540 |
44 |
17.5 |
55 |
3.33 |
10.9 |
48 |
.34 |
46 |
.32 |
47,000 |
1775 |
| Avg. |
37 |
15.1 |
55 |
2.90 |
10.9 |
46 |
.38 |
43 |
.35 |
40,000 |
1775 |
Overall
Avg. |
34 |
13.5 |
53.5 |
2.50 |
10.0 |
37 |
.33 |
35 |
.31 |
32,000 |
1775 |
Table 5. Requirements of Bulls (Growth + Maintenance, Moderate Activity)
| |
TDN |
Crude Protein |
Calcium |
Phosphorus |
Vitamin A |
Bull
Wt lb. |
Avg.
Daily
Gain lb. |
Max
Daily
DM lb. |
lb./day |
% DM |
lb./day |
% DM |
g/day |
% DM |
g/day |
% DM |
IU/day |
IU/lb. |
| 660 |
2.4 |
19 |
13.2 |
77 |
2.16 |
12 |
29 |
.41 |
23 |
.32 |
34,000 |
1775 |
| 880 |
2.0 |
24 |
15.4 |
64 |
2.27 |
22 |
23 |
.21 |
23 |
.21 |
43,000 |
1775 |
| 1100 |
1.5 |
27 |
16.5 |
61 |
2.36 |
10 |
22 |
.18 |
22 |
.18 |
48,000 |
1775 |
| 1323 |
1.1 |
29 |
16.1 |
61 |
2.25 |
9 |
22 |
.18 |
22 |
.18 |
48,000 |
1775 |
| 1543 |
0.3 |
31 |
17.0 |
55 |
2.38 |
8.5 |
23 |
.18 |
23 |
.18 |
50,000 |
1775 |
| 1764 |
0 |
33 |
12.8 |
55 |
1.96 |
8.5 |
19 |
.18 |
19 |
.18 |
41,000 |
1775 |
| 1984 |
0 |
35 |
13.9 |
55 |
2.32 |
8.5 |
22 |
.18 |
22 |
.18 |
48,000 |
1775 |
| 2205 |
0 |
37 |
15.2 |
55 |
2.32 |
8.5 |
22 |
.18 |
22 |
.18 |
48,000 |
1775 |
| 2425 |
0 |
39 |
16.4 |
55 |
2.40 |
8.5 |
23 |
.18 |
23 |
.18 |
51,000 |
1775 |
Table 6. Winter Feed Budget for a 50-Cow Beef Herd Using Hay as Roughage
| |
Hay |
Grain |
| Class of Cattle |
No. head |
No. Days |
lb. per head per day |
Herd total for winter (T) |
Total per cow unit (T) |
lb. per head per day |
Herd total for winter (lb.) |
Total per cow unit (lb.) |
| Pregnant mature Cows |
40 |
120 |
25 |
60.0 |
1.20 |
--- |
--- |
--- |
| Lactating mature Cows |
40 |
60 |
35 |
42.0 |
0.84 |
--- |
--- |
--- |
| Pregnant 2-yr. Heifers |
10 |
120 |
25 |
15.0 |
0.30 |
--- |
--- |
--- |
| Lactating 2-yr. Heifers |
10 |
60 |
35 |
10.5 |
0.21 |
--- |
--- |
--- |
| Open Yearling Heifers |
13 |
180 |
12 |
14.0 |
|
5 |
11,700 |
234 |
| Mature herd sire |
1 |
180 |
30 |
2.7 |
|
10 |
1,800 |
36 |
| Young herd sire |
1 |
180 |
20 |
1.8 |
0.04 |
12 |
2.160 |
43 |
| Total |
--- |
--- |
--- |
146.0 |
2.92 |
--- |
15,660 |
313 |
As shown in Table 6, it takes about 3 T. of hay and 300 lbs. of grain
per producing female to winter a herd consisting of 50 breeding age females, 13 open yearling replacement
heifers and 2 herd sires for 180 days. In addition, it would take a total of about 35 lb. of salt-mineral mix
per cow unit, or a total for the entire herd of approximately 1,750 lbs. over the 180 day period.
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