APPENDIX TABLE 23 Diet Nutrient Density Requirements of Beef Cows

Months since Calving

 

1

2

3

4

5

6

7

8

9

10

11

12

1,400 lb Mature Weight, 10 lb Peak Milk

TDN, % DM

54.9

55.5

53.3

52.5

51.8

51.2

45.0

45.8

47.3

49.5

52.6

56.6

ME, mcal/lb

0.92

0.93

0.89

0.88

0.86

0.86

0.75

0.77

0.79

0.83

0.88

0.95

NEm, mcal/lb

0.53

0.54

0.51

0.49

0.48

0.47

0.37

0.39

0.41

0.44

0.49

0.56

DM, lb

27.1

27.6

28.9

28.5

28.0

27.7

27.2

27.0

26.9

26.8

27.0

27.6

Milk, lb/day

8.3

10.0

9.0

7.2

5.4

3.9

0.0

0.0

0.0

0.0

0.0

0.0

CP % DM

8.23

8.56

7.91

7.55

7.19

6.90

6.00

6.20

6.53

7.04

7.80

8.88

Ca % DM

0.23

0.25

0.23

0.21

0.20

0.19

0.16

0.16

0.16

0.27

0.26

0.26

P % DM

0.17

0.17

0.16

0.15

0.15

0.14

0.12

0.12

0.12

0.17

0.17

0.16

1,400 lb Mature Weight, 20 lb Peak Milk

TDN, % DM

58.0

59.1

56.8

55.5

54.1

53.0

45.0

45.8

47.3

49.5

52.6

56.6

ME, mcal/lb

0.97

0.99

0.95

0.93

0.90

0.89

0.75

0.77

0.79

0.83

0.88

0.95

NEm, mcal/lb

0.58

0.60

0.56

0.54

0.52

0.50

0.37

0.39

0.41

0.44

0.49

0.56

DM, lb

29.5

30.5

31.3

30.3

29.4

28.6

27.2

27.0

26.9

26.8

27.0

27.6

Milk, lb/day

16.7

20.0

18.0

14.4

10.8

7.8

0.0

0.0

0.0

0.0

0.0

0.0

CP % DM

9.76

10.31

9.56

8.94

8.29

7.73

6.00

6.20

6.53

7.04

7.80

8.88

Ca % DM

0.28

0.30

0.28

0.26

0.24

0.22

0.16

0.16

0.16

0.27

0.26

0.26

P % DM

0.19

0.20

0.19

0.18

0.17

0.16

0.12

0.12

0.12

0.17

0.17

0.16

1,400 lb Mature Weight, 30 lb Peak Milk

TDN, % DM

60.7

62.2

59.8

58.1

56.2

54.7

45.0

45.8

47.3

49.5

52.6

56.6

ME, mcal/lb

1.01

1.04

1.00

0.97

0.94

0.91

0.75

0.77

0.79

0.83

0.88

0.95

NEm, mcal/lb

0.62

0.64

0.61

0.58

0.55

0.53

0.37

0.39

0.41

0.44

0.49

0.56

DM, lb

31.9

33.3

33.7

32.3

30.8

29.6

27.2

27.0

26.9

26.8

27.0

27.6

Milk, lb/day

25.0

30.0

27.0

21.6

16.2

11.7

0.0

0.0

0.0

0.0

0.0

0.0

CP % DM

11.07

11.77

10.95

10.15

9.27

8.49

6.00

6.20

6.53

7.04

7.80

8.88

Ca % DM

0.33

0.35

0.32

0.30

0.27

0.24

0.16

0.16

0.16

0.27

0.26

0.26

P % DM

0.22

0.23

0.21

0.20

0.18

0.17

0.12

0.12

0.12

0.17

0.17

0.16



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