Merck Manual

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Nutrient Requirements of Growing and Finishing Beef Cattle a

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)

Maintenance requirement

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

Growth requirement (Average daily gain in kg [lb])

NEg required for gain (Mcal/day)

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)

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)

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)

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.

Adapted, with permission, from Nutrient Requirements of Beef Cattle, 2000, National Academy of Sciences, National Academy Press, Washington, DC.