Appendix IV Nutrient Requirements of Beef Cattle 1995 Beef Cattle Feeding and Nutrition Second Edition

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Appendix IV 
Nutrient Requirements of Beef Cattle 
Tilden Wayne Perry 
Beef Cattle Feeding and Nutrition, 
Second Edition 351 
Copyright �9 1995 by Academic Press, Inc. 
All rights of reproduction in any form reserved. 
3 5 2 Appendix IV 
TABLE AIV.I 
Nutrient Requirements for Growing and Wmishing Beef Cattle, Nutrient Concentration 
in Diet Dry Matter, Metric System 
Dry 
Body Daily matter Protein ME NE m NEg 
weight gain intake intake Protein TDN Ca 
(kg) (g) (kg) (g) (%) (Mcal/kg) (%) (%) 
P 
(%) 
Medium-frame steer calves 
136 227 3.5 340 9.6 2.0 1.1 0.55 54 0.31 
454 3.8 431 11.4 2.1 1.3 0.68 58.5 0.45 
681 3.9 517 13.2 2.3 1.4 0.83 63 0.58 
908 4.0 599 14.8 2.4 1.5 0.97 67.5 0.72 
1135 4.0 672 16.7 2.7 1.7 1.12 73.5 0.87 
1362 3.6 726 19.9 2.8 2.1 1.41 85 1.13 
181 227 4.4 395 8.9 2.0 1.1 0.55 54 0.27 
454 4.7 490 10.3 2.1 1.3 0.68 58.5 0.38 
681 4.9 563 11.5 2.3 1.4 0.83 63 0.47 
908 5.0 640 12.7 2.4 1.5 0.97 67.5 0.56 
1135 5.0 708 14.2 2.7 1.7 1.12 73.5 0.68 
1362 4.5 749 16.6 2.8 2.1 1.41 85 0.86 
227 227 5.2 445 8.5 2.0 1.1 0.55 54 0.25 
454 5.6 526 9.5 2.1 1.3 0.68 58.5 0.32 
681 5.8 604 10.5 2.3 1.4 0.83 63 0.40 
908 6.0 676 11.4 2.4 1.5 0.97 67.5 0.47 
1135 5.9 740 12.5 2.7 1.7 1.12 73.5 0.56 
1362 5.4 767 14.4 2.8 2.1 1.41 85 0.69 
272 227 6.0 490 8.2 2.0 1.1 0.55 54 0.23 
454 6.4 572 9.0 2.1 1.3 0.68 58.5 0.28 
681 6.7 645 9.8 2.3 1.4 0.83 63 0.35 
908 6.8 712 10.5 2.4 1.5 0.97 67.5 0.46 
1135 6.8 767 11.4 2.7 1.7 1.12 73.5 0.46 
1362 6.1 785 12.9 2.8 2.1 1.41 85 0.57 
318 227 6.7 536 7.9 2.0 1.1 0.55 54 0.22 
454 7.2 613 8.6 2.1 1.3 0.68 58.5 0.27 
681 7.5 681 9.2 2.3 1.4 0.83 63 0.31 
908 7.6 749 9.8 2.4 1.5 0.97 67.5 0.34 
1135 7.6 794 10.5 2.7 1.7 1.12 73.5 0.40 
1362 6.9 804 11.7 2.8 2.1 1.41 85 0.49 
363 227 7.4 576 7.7 2.0 1.1 0.55 54 0.22 
454 8.0 654 8.3 2.1 1.3 0.68 58.5 0.24 
681 8.3 722 8.8 2.3 1.4 0.83 63 0.28 
908 8.6 781 9.2 2.4 1.5 0.97 67.5 0.31 
1135 8.4 822 9.8 2.7 1.7 1.12 73.5 0.35 
1362 7.6 822 10.8 2.8 2.1 1.41 85 0.42 
409 227 8.1 608 7.6 2.0 1.1 0.55 54 0.21 
454 8.7 690 8.0 2.1 1.3 0.68 58.5 0.23 
681 8.3 754 8.4 2.3 1.4 0.83 63 0.28 
908 9.2 808 8.8 2.4 1.5 0.97 67.5 0.28 
0.20 
0.24 
0.28 
0.32 
0.37 
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0.18 
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0.25 
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0.37 
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Appendix IV 3 5 9 
TABLE AIV.1 (Continued) 
Dry 
Body Daily matter Protein ME NE m NEg 
weight gain intake intake Protein TDN Ca P 
(kg) (g) (kg) (g) (%) (Mcal/kg) (%) (%) (%) 
908 6.8 700 10.3 2.5 1.6 1.01 69.5 0.38 0.22 
1135 6.6 740 11.2 2.8 1.8 1.21 77 0.44 0.24 
318 227 6.7 536 7.9 2.0 1.1 0.55 54 0.21 0.18 
454 7.2 608 8.5 2.2 1.3 0.70 59 0.25 0.18 ~ 
691 7.5 676 9.0 2.3 1.4 0.86 64 0.29 0.19 
908 7.6 731 9.6 2.5 1.6 1.01 69.5 0.33 0.20 
1135 7.4 762 10.3 2.8 1.8 1.21 77 0.38 0.22 
364 227 7.4 577 7.7 2.0 1.1 0.55 54 0.21 0.18 
454 8.0 649 8.2 2.2 1.3 0.70 59 0.24 0.18 
691 8.3 713 8.6 2.3 1.4 0.86 64 0.25 0.18 
908 8.4 758 9.0 2.5 1.6 1.01 69.5 0.28 0.19 
1135 8.2 790 9.6 2.8 1.8 1.21 77 0.33 0.21 
409 227 8.1 617 7.5 2.0 1.1 0.55 54 0.20 0.18 
454 8.7 690 7.9 2.2 1.3 0.70 59 0.22 0.18 
691 9.1 744 8.2 2.3 1.4 0.86 64 0.23 0.18 
908 9.2 790 8.6 2.5 1.6 1.01 69.5 0.26 0.18 
1135 8.9 808 9.0 2.8 1.8 1.21 77 0.29 0.20 
454 227 8.7 658 7.4 2.0 1.1 0.55 54 0.19 0.18 
454 9.4 726 7.7 2.2 1.3 0.70 59 0.21 0.18 
691 9.9 776 8.0 2.3 1.4 0.86 64 0.21 0.18 
908 10.0 817 8.2 2.5 1.6 1.01 69.5 0.23 0.18 
1135 9.6 840 8.6 2.8 1.8 1.21 77 0.25 0.18 
500 227 9.4 699 7.3 2.0 1.1 0.55 54 0.19 0.18 
454 10.1 763 7.5 2.2 1.3 0.70 59 0.20 0.18 
691 10.5 808 7.7 2.3 1.4 0.86 64 0.20 0.18 
908 10.7 844 7.9 2.5 1.6 1.01 69.5 0.21 0.18 
1135 10.5 853 8.2 2.8 1.8 1.21 77 0.22 0.18 
Note. Vitamin A requirement is 2200 IU/kg of diet. The data presented in this table are a modification of Table 
10, "Nutrient Requirements of Beef Cattle," 6 th rev. ed., National Academy of Science, Washington, DC, 1984. 
Weight 
(kg) 
Gain 
(g/day) 
Table AIV.2 
Nutrient Requirements of Breeding Cattle (Metric System) 
In diet dry matter 
ME NEm NEg Total 
Intake TDN protein Ca 
(DM/day) (%) Mcal/kg dry matter (gm/day) (g/%) 
P 
(g/%) 
Vitamin A 
IU/day 
(x I000) 
318 
340 
363 
386 
409 
432 
364 
409 
454 
500 
545 
591 
636 
364 
409 
454 
500 
545 
591 
636 
318 
341 
364 
386 
409 
409 
636 
863 
409 
636 
863 
409 
636 
863 
409 
636 
863 
409 
636 
863 
409 
636 
863 
Pregnant yearling heifers--Last third of pregnancy 
7.0 55.4 2.0 1.1 NA 590 0.27 0.20 
7.2 60.3 2.2 1.3 0.75 636 0.33 0.21 
7.2 67.0 2.4 1.5 0.95 681 0.33 0.21 
7.3 55.1 2.0 1.1 NA 590 0.27 0.19 
7.5 59.5 2.2 1.3 0.73 681 0.32 0.21 
7.5 66.5 2.4 1.5 0.92 726 0.37 0.23 
7.6 54.8 2.0 1.1 NA 636 0.28 0.20 
7.9 56.9 2.2 1.3 0.73 681 0.33 0.21 
8.0 66.1 2.4 1.5 0.92 726 0.35 0.21 
8.0 54.5 2.0 1.1 NA 636 0.26 0.20 
8.3 59.3 2.2 1.3 0.70 726 0.30 0.21 
8.3 65.7 2.4 1.5 0.90 772 0.34 0.22 
8.3 54.3 2.0 1.1 NA 681 0.26 0.20 
8.6 59.1 2.2 1.3 0.70 726 0.30 0.21 
8.7 65.4 2.4 1.5 0.90 772 0.32 0.21 
8.6 54.1 2.0 1.1 NA 681 0.27 0.20 
9.0 58.9 2.1 1.1 0.70 772 0.29 0.21 
9.1 65.1 2.4 1.5 0.88 817 0.32 0.21 
Dry pregnant maturecowsmMiddle third of pregnancy 
0 7.0 48.8 1.8 0.9 NA 499 0.17 0.17 
0 7.6 48.8 1.8 0.9 NA 545 0.18 0.18 
0 8.2 48.8 1.8 0.9 NA 590 0.18 0.18 
0 8.9 48.8 1.8 0.9 NA 636 0.19 0.19 
0 9.4 48.8 1.8 0.9 NA 636 0.19 0.19 
0 10.0 48.8 1.8 0.9 NA 681 0.20 0.20 
0 10.6 48.8 1.8 0.9 NA 726 0.21 0.20 
Dry pregnant cowsmLast third of pregnancy 
409 7.6 54.5 2.0 1.1 NA 636 0.26 0.20 
409 8.3 54.0 2.0 1.1 NA 681 0.27 0.21 
409 8.9 53.6 1.9 1.1 NA 726 0.26 0.20 
409 9.5 53.2 1.9 1.1 NA 726 0.26 0.21 
409 10.1 52.9 1.9 1.1 NA 772 0.26 0.21 
409 10.7 52.7 1.9 1.1 NA 817 0.26 0.21 
409 11.3 52.5 1.8 1.1 NA 863 0.26 0.21 
Two-year-old heifers nursing calvesmFirst 3-4 months postpartum, 4.5 kg milk/day 
227 7.2 65.1 2.4 1.5 0.88 817 0.36 0.24 
227 7.6 64.4 2.3 1.4 0.88 817 0.34 0.24 
227 8.0 63.8 2.3 1.4 0.84 863 0.34 0.24 
227 8.4 63.2 2.3 1.4 0.84 863 0.33 0.23 
227 8.7 62.7 2.3 1.4 0.81 908 0.32 0.23 
19 
20 
20 
20 
21 
21 
21 
22 
22 
22 
23 
23 
23 
24 
24 
24 
25 
25 
19 
21 
23 
26 
28 
28 
30 
21 
23 
25 
26 
28 
30 
32 
28 
30 
31 
33 
34 
360 
Table AIV.2 (Continued) 
In diet dry matter 
ME NE m NEg Total Vitamin A 
Weight Gain Intake TDN protein Ca P IU/day 
(kg) (g/day) (DM/day) (%) Mcal/kg dry matter (gm/day) (g/%) (g/%) (x 1000) 
432 227 9.1 62.3 2.2 1.4 0.81 908 0.31 0.23 35 
454 227 9.5 61.9 2.2 1.4 0.79 953 0.31 0.23 37 
Cows nursing calves--Average nursing ability, First 3-4 months postpartum, 4.5 kg milk/day 
364 0 7.9 58.2 2.1 1.3 NA 817 0.30 0.23 31 
409 0 8.5 57.3 2.1 1.2 NA 863 0.28 0.22 33 
454 0 9.2 56.9 2.0 1.2 NA 908 0.28 0.22 36 
500 0 9.8 56.0 2.0 1.2 NA 908 0.27 0.22 38 
545 0 10.4 55.5 2.0 1.2 NA 953 0.27 0.22 41 
591 0 11.0 55.1 2.0 1.1 NA 999 0.27 0.22 43 
636 0 11.6 54.7 2.0 1.1 NA 1044 0.27 0.22 46 
Cows nursing calvesmSuperior milking ability, First 3-4 months postpartum, 9.1 kg milk/day 
364 0 7.1 77.3 2.8 1.9 NA 1000 0.48 0.31 28 
409 0 8.5 69.8 2.5 1.6 NA 1089 0.41 0.28 33 
454 0 9.4 67.0 2.4 1.5 NA 1135 0.39 0.27 37 
500 0 10.1 65.2 2.4 1.5 NA 1180 0.38 0.27 40 
545 0 10.8 63.7 2.3 1.4 NA 1226 0.36 0.26 42 
591 0 11.5 62.6 2.3 1.4 NA 1271 0.36 0.26 45 
636 0 12.3 61.7 2.2 1.4 NA 1316 0.35 0.26 47 
Bulls, maintenance and slow growth rate (regain body condition) 
591 454 11.5 55.8 2.0 1.2 0.62 862 0.22 0.19 45 
681 11.9 59.7 2.2 1.3 0.73 908 0.24 0.19 46 
908 11.9 64.0 2.3 1.4 0.86 1000 0.26 0.20 46 
636 454 12.2 55.8 2.0 1.2 0.62 908 0.21 0.19 48 
681 12.5 59.7 2.2 1.3 0.73 953 0.23 0.19 49 
908 12.6 64.0 2.3 1.4 0.86 1000 0.25 0.20 49 
682 0 11.5 48.4 1.7 0.9 NA 772 0.20 0.20 45 
454 12.9 55.8 2.0 1.2 0.62 953 0.21 0.19 50 
681 13.2 59.7 2.2 1.3 0.73 1000 0.22 0.19 51 
727 0 12.0 48.4 1.7 0.9 NA 817 0.19 0.20 47 
454 13.5 55.8 2.0 1.2 0.62 1000 0.22 0.19 53 
681 13.8 59.7 2.2 1.3 0.73 1044 0.22 0.20 54 
772 0 12.6 48.4 1.7 0.9 NA 863 0.21 0.21 49 
227 13.5 52.0 1.9 1.0 0.48 953 0.20 0.19 52 
818 0 13.1 48.4 1.7 0.9 NA 908 0.21 0.21 51 
227 14.0 52.0 1.9 1.0 0.48 1000 0.20 0.20 55 
864 0 13.7 48.4 1.7 0.9 NA 908 0.21 0.21 53 
227 14.6 52.0 1.9 1.0 0.48 1000 0.20 0.20 57 
909 0 14.2 48.4 1.7 0.9 NA 953 0.21 0.21 55 
954 0 14.8 48.4 1.7 0.9 NA 1000 0.22 0.22 58 
1000 0 15.3 48.4 1.7 0.9 NA 1044 0.22 0.22 60 
Note. Approximately 400 gm of weight gain per day of females during the last one-third of pregnancy is accounted for by the 
products of conception. Daily 2.15 Mcal of NE,,, and 454 g protein are provided for this requirement for a calf with a birth 
weight of 36 kg. In determining energy and protein requirements for milk production, 0.75 Mcal of NEm and 35 g of protein is 
included for each kg of milk produced. 
361 
362 Appendix IV 
TABLE AIV.3 
Nutrient Requirements for Beef Cattle Breeding Herd (Daily Nutrients per Ani l l l a l ) a 
Minimum 
Daily dry matter Total Vitamin A 
Weight gain consumption Roughage protein TDN Ca P (thousands) 
(lb) (lb) (lb) (%) (lb) (lb) (g) (g) (IU) 
Pregnant yearling heifersmLast 3-4 months of pregnancy 
716 0.9 14.5 100 1.28 7.7 15 15 19 
1.3 18.7 100 1.65 9.9 18 18 23 
1.8 20.7 85-100 1.87 12.3 22 20 26 
772 0.9 15.2 100 1.34 8.1 15 15 19 
1.3 19.6 100 1.72 10.3 19 19 25 
1.8 22.0 85-100 1.94 12.9 22 21 28 
827 0.9 15.9 100 1.39 8.4 15 15 20 
1.3 20.5 100 1.78 10.8 19 19 26 
1.8 24.2 85-100 2.11 13.5 22 22 31 
882 0.9 16.5 100 1.43 8.7 16 16 21 
1.3 21.4 100 1.85 11.3 19 19 27 
1.8 25.6 85-100 2.22 14.0 22 22 33 
937 0.9 17.2 100 1.52 9.0 16 16 22 
1.3 22.3 100 1.94 11.7 19 19 28 
1.8 26.7 85-100 2.31 14.6 22 22 34 
Dry pregnant cowsmMiddle third of pregnancy 
772 12.2 100 0.70 6.6 10 10 15 
882 13.4 100 0.79 7.3 11 11 17 
992 14.8 100 0.86 7.9 12 12 19 
1102 15.9 100 0.93 8.6 13 13 20 
1213 17.0 100 0.99 9.2 14 14 22 
1323 18.3 100 1.08 9.8 15 15 23 
1433 19.4 100 1.14 10.4 16 16 25 
Dry pregnant mature cowsmLast third of pregnancy 
772 0.9 13.9 100 0.42 8.0 12 12 19 
882 0.9 15.4 100 0.97 8.7 14 14 21 
992 0.9 16.5 100 1.06 9.4 15 15 23 
1102 0.9 17.9 100 1.12 10.0 15 15 24 
1213 0.9 19.0 100 1.19 10.7 16 16 26 
1323 0.9 20.3 100 1.26 11.2 17 17 27 
1433 0.9 22.4 100 1.32 11.9 18 18 29 
Cows nursing calvesmAverage milking ability, first 3-4 months postpartum 
772 18.1 100 1.65 9.7 24 24 19 
882 19.4 100 1.78 10.4 25 25 21 
992 20.5 100 1.89 11.0 26 26 23 
1102 21.6 100 1.98 11.7 27 27 24 
1213 23.1 100 2.14 12.3 28 28 26 
1323 24.2 100 2.22 13.0 28 28 27 
1433 25.1 100 2.31 13.7 29 29 29 
Appendix IV 363 
TABLE AIV.3 (Continued) 
Minimum 
Daily dry matter Total Vitamin A 
Weight gain consumption Roughage protein TDN Ca P (thousands) 
(lb) (lb) (lb) (%) (lb) (lb) (g) (g) (IU) 
Cows nursing calves--Superior milking ability, first 3-4 months postpartum 
772 22.4 100 2.44 12.8 45 40 32 
882 23.8 100 2.58 13.5 45 41 34 
992 24.9 100 2.71 14.1 45 42 36 
1102 26.0 100 2.84 14.8 46 43 38 
1213 27.3 100 2.97 15.4 46 44 41 
1323 28.4 100 3.10 16.1 46 44 43 
1433 29.5 100 3.22 16.8 47 45 45 
Bulls, growth and maintenance (moderate activity) 
661 2.2 19.4 70-75 1.98 12.3 27 23 34 
882 2.0 24.2 70-75 2.27 15.4 23 23 43 
1102 1.5 26.9 80-85 2.35 16.5 22 22 48 
1323 1.1 26.4 80-85 2.25 16.1 22 22 48 
1543 0.7 28.4 90-100 2.38 17.0 23 23 50 
1764 0 23.1 100 1.96 12.8 19 19 41 
1984 0 25.1 100 2.18 13.9 21 21 44 
2205 0 27.3 100 2.31 15.2 22 22 48 
aModified from "Nutrient Requirements of Beef Cattle," 6th rev. ed., National Academy of Sciences, Washing- 
ton, D.C., 1984, Table 10. With permission. 
TABLE AIV.4 
Nutrient Requirements for Growing-Finishing Steer Calves and Yearlings 
(Nutrient Concentration in Diet Dry Matter) a.b 
i 
Minimum 
Daily dry matter Total 
Weight gain consumption Roughage protein TDN Ca P 
(lb) (lb) (lb) (%) (lb) (lb) (g) (g) 
220 0 4.6 100 8.7 55 0.18 0.18 
1.1 6.4 70-80 12.4 62 0.48 0.38 
1.5 6.0 50-60 14.8 70 0.70 0.48 
2.0 6.2 25-30 16.4 77 0.86 0.57 
2.4 6.0 <15 18.2 86 1.04 0.70 
331 0 6.2 100 8.7 55 0.18 0.18 
1.1 8.8 70-80 11.0 62 0.35 0.32 
1.5 8.6 50-60 12.6 70 0.46 0.36 
(continues) 
364 Appendix IV 
TABLE AIV.4 (Continued) 
Minimum 
Daily dry matter Total 
Weight gain consumption Roughage protein TDN Ca P 
(lb) (lb) (lb) (%) (lb) (lb) (g) (g) 
2.0 8.4 25-30 14.1 77 0.61 0.45 
2.4 8.2 <15 15.6 86 0.76 0.54 
441 0 7.7 100 8.5 55 0.18 0.18 
1.1 12.8 80-90 9.9 58 0.24 0.22 
1.5 12.6 70-80 10.8 64 0.32 0.28 
2.0 10.8 35-45 12.3 75 0.47 0.37 
2.4 10.1 <15 13.6 86 0.59 0.43 
551 0 9.7 100 8.5 55 0.18 0.18 
1.5 12.8 55-65 10.7 70 0.31 0.28 
2.0 13.7 45-50 11.1 72 0.35 0.31 
2.4 13.2 20-25 12.1 77 0.43 0.35 
2.9 13.2 <15 12.7 86 0.50 0.38 
661 0 10.4 100 8.6 55 0.18 0.18 
2.0 17.9 55-65 10.0 70 0.27 0.23 
2.4 16.8 20-25 10.8 77 0.33 0.29 
2.9 15.6 <15 11.7 83 0.41 0.32 
3.1 16.1 <15 11.9 86 0.42 0.34 
772 0 11.7 100 8.5 55 0.18 0.18 
2.0 17.6 45-5510.0 72 0.25 0.22 
2.4 17.6 20-25 10.4 80 0.29 0.25 
2.9 17.6 <15 10.8 83 0.32 0.28 
3.1 18.1 <15 10.9 86 0.34 0.29 
882 0 13.0 100 8.5 55 0.18 0.18 
2.2 20.7 45-55 9.4 72 0.22 0.21 
2.6 18.7 20-25 10.2 80 0.27 0.25 
2.9 19.0 <15 10.4 86 0.29 0.26 
3.1 19.8 <15 10.5 86 0.29 0.26 
992 0 14.1 100 8.5 55 0.18 0.18 
2.2 22.7 45-55 9.3 72 0.19 0.19 
2.6 22.5 20-25 9.5 80 0.23 0.22 
2.9 20.5 <15 10.4 86 0.26 0.25 
3.1 21.6 <15 10.0 86 0.26 0.23 
1102 0 15.4 100 8.5 55 0.18 0.18 
2.0 23.1 45-55 9.1 72 0.18 0.18 
2.4 22.9 20-25 9.2 80 0.19 0.19 
2.6 21.2 <15 10.0 86 0.22 0.22 
2.9 22.0 <15 9.7 86 0.22 0.22 
,,Modified from "Nutrient Requirements of Beef Cattle," 6th rev. ed., National Academy of Sciences, Washing- 
ton, D.C., 1984, Table 10. With permission. 
bThe concentration of vitamin A in all diets for growing and finishing steer calves and yearlings is 1000 IU/lb 
dry diet. 
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366 Appendix IV 
Weight 
(lb) 
TABLE AIV.5 (Continued) 
Minimum 
Daily dry matter Total 
gain consumption Roughage protein TDN Ca P 
(lb) (lb) (%) (lb) (lb) (g) (g) 
992 
1.1 18.7 70-80 8.8 64 0.18 0.18 
1.5 19.2 55-65 9.0 66 0.18 0.18 
2.0 18.5 20-25 9.4 77 0.20 0.20 
2.4 18.3 <15 9.7 86 0.23 0.22 
0 14.1 100 8.5 55 0.18 0.18 
0.4 19.2 100 8.5 55 0.18 0.18 
1.1 20.5 70-80 8.6 64 0.18 0.18 
1.8 20.1 35-45 9.0 75 0.18 0.18 
2.2 18.7 <15 9.5 86 0.22 0.22 
,,Modified from "Nutrient Requirements of Beef Cattle," 6th rev. ed., National Academy of Science, Washing- 
ton, D.C., 1984, Table 10. With permission. 
bThe concentration of vitamin A in all diets for growing and finishing heifers is 2000 IU/lb dry diet. 
Daily 
Weight gain 
(lb) (lb) 
TABLE AIV.6 
Nutrient Requirements for Beef Cattle Breeding Herd 
(Nutrient Concentration in Diet Dry Matter) `',b 
Minimum 
dry matter Total 
consumption Roughage protein 
(lb) (%) (lb) 
TDN 
(lb) 
Ca 
(g) 
P 
(g) 
716 0.9 
1.3 
1.8 
772 0.9 
1.3 
1.8 
827 0.9 
1.3 
1.8 
882 0.9 
1.3 
1.8 
937 0.9 
1.3 
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772 
882 
Pregnant yearling heifersmLast third of pregnancy 
14.5 100 8.8 52 
18.7 100 8.8 52 
20.7 85-100 9.0 58 
15.2 100 8.8 52 
19.6 100 8.8 52 
22.0 85-100 8.8 58 
15.9 100 8.7 52 
20.5 100 8.7 52 
24.2 85-100 8.7 55 
16.5 100 8.7 52 
21.4 100 8.7 52 
25.6 85-100 8.7 55 
17.2 100 8.8 52 
22.3 100 8.7 52 
26.7 85-100 8.7 55 
Dry pregnant mature cowsnMiddle third of pregnancy 
12.2 100 5.9 52 
13.4 100 5.9 52 
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368 Appendix IV 
TABLE AIV.7 
Net Energy Requirements of Growing and Finishing Beef Cattle 
(Megacalories per Animal per Day) ~ 
Body weight (lb) 
Daily gain (lb): 220 330 440 550 660 770 880 990 1100 
NEg require: (2.43) b (3.30) (4.10) (4.84) (5.55) (6.24) (6.89) (7.52) (8.14) 
Steers 
0.2 0.17 0.23 0.28 0.34 0.39 0.43 0.48 0.52 0.56 
0.4 0.34 0.46 0.57 0.68 0.78 0.88 0.97 1.06 1.14 
0.7 0.52 0.70 0.87 1.03 1.18 1.33 1.47 1.61 1.74 
0.9 0.70 0.95 1.18 1.40 1.60 1.80 1.99 2.17 2.34 
1.1 0.89 1.20 1.49 1.77 2.02 2.27 2.51 2.74 2.97 
1.3 1.08 1.46 1.81 2.15 2.46 2.76 3.05 3.33 3.60 
1.5 1.27 1.73 2.14 2.53 2.90 3.26 3.60 3.93 4.25 
1.8 1.47 2.00 2.47 2.93 3.36 3.77 4.17 4.55 4.92 
2.0 1.68 2.27 2.82 3.33 3.82 4.29 4.74 5.18 5.60 
2.2 1.88 2.55 3.16 3.75 4.29 4.82 5.33 5.82 6.29 
2.4 2.10 2.84 3.52 4.17 4.78 5.36 5.93 6.47 7.01 
2.6 2.31 3.13 3.88 4.60 5.27 5.92 6.54 7.14 7.73 
2.9 2.53 3.43 4.26 5.04 5.77 6.48 7.16 7.83 8.47 
3.1 2.76 3.74 4.63 5.49 6.29 7.06 7.80 8.52 9.22 
3.3 2.99 4.05 5.02 5.95 6.81 7.65 8.46 9.23 9.98 
Heifers 
0.2 0.18 0.25 0.30 0.36 0.41 0.46 0.51 0.56 0.61 
0.4 0.37 0.50 0.62 0.74 0.84 0.95 1.05 1.14 1.24 
0.7 0.57 0.77 0.95 1.13 1.29 1.45 1.61 1.75 1.90 
0.9 0.77 1.05 0.30 1.54 1.76 1.98 2.18 2.39 2.58 
1.1 0.99 1.34 1.66 1.96 2.25 2.52 2.79 3.05 3.30 
1.3 1.21 1.64 2.03 2.40 2.75 3.09 3.41 3.73 4.03 
1.5 1.44 1.95 2.42 2.86 3.27 3.68 4.06 4.44 4.80 
1.8 1.67 2.28 2.81 3.33 3.82 4.28 4.73 5.17 5.59 
2.0 1.92 2.60 3.23 3.81 4.37 4.91 5.43 5.93 6.41 
2.2 2.17 2.94 3.65 4.32 4.95 5.56 6.14 6.71 7.26 
2.4 2.43 3.30 4.09 4.84 5.55 6.23 6.88 7.52 8.13 
2.6 2.70 3.66 4.55 5.37 6.16 6.91 7.64 8.35 9.03 
2.9 2.98 4.04 5.01 5.92 6.79 7.63 8.42 9.21 9.96 
3.1 3.26 4.42 5.49 6.49 7.44 8.36 9.23 10.09 10.91 
3.3 3.56 4.82 5.98 7.07 8.11 9.11 10.06 11.00 11.90 
aModified from "Nutrient Requirements of Beef Cattle," 6th rev. ed., National Academy of Sciences, Washing- 
ton, D.C., 1984, Table 7. With permission. 
bNumbers in parentheses are NEm required to achieve body weight given. 
Appendix IV 3 69 
TABLE AIV.8 
Mineral and Vitamin Requirements of Beef Cattle 
(in Percentage of Diet Dry Matter or Amount per Pound of Dry Diet) ~ 
i i 
Growing and Dry Breeding bulls Possible 
finishing steers pregnant and toxic levels 
Nutrient and heifers cows lactating cows (mg/lb diet) 
Vitamin A activity (IU) 1000 1272 1770 
Vitamin D (IU) 125 125 125 
Vitamin E (IU) 7-27 m 7-27 
Minerals 
Sodium ( % ) 0.06 0.06 0.06 
Calcium (%) 0.18-1.04 0.18 0.18-0.44 
Phosphorus (%) 0.18-0.70 nb 0.1 8--0.39 
Magnesium (%) 0.04-0.10 __b 0.18 
Potassium (%) 0.6-0.8 mb __b 
Sulfur (%) 0.1 __b __b 
Iodine (lxg) 0.5 0.2-2.0 __b 
Iron (mg) 4 ~b ~b 
Copper (mg) 2 __b __b 
Cobalt (mg) 0.02-0.04 0.02-0.04 0.02-0.04 
Manganese (mg) 0.4-4.5 9 ~b 
Zinc (mg) 9.1-13.6 __b mb 
Selenium (mg) 0.04 0.02-0.04 0.04-0.04 
i i i i 
50 
1000 
50 
4-6 
68 
410 
2 
,,Modified from "Nutrient Requirements of Beef Cattle," 6th rev. ed.,National Academy of Sciences, Washing- 
ton, D.C., 1984, Table 3. With permission. 
bVnknown. 
cSee Table 1.4 for more details.