Table 1 Descriptive statistics for the database used for developing equations in this study

Animal inputs

BW, kg

442

638.21

53.41

641.00

778.00

443.00

DIM, day

358

115.23

56.12

116.50

277.00

1.00

DMI, kg/d

442

22.53

3.51

22.95

32.80

7.00

DMI,% BW

442

3.53

0.50

3.60

5.04

1.26

Forage DMI, kg

442

11.40

2.49

11.40

19.90

3.47

Forage,%DM

442

51.06

10.66

50.00

100.00

19.70

Nutrient composition

DM,% AF

303

54.90

9.58

53.90

88.40

27.73

CP,% DM

441

17.35

1.89

17.30

25.98

7.10

EE,% DM

203

4.35

1.30

4.35

8.40

1.50

Ash,% DM

189

7.80

2.08

7.50

18.40

3.42

NFC,% DM

183

38.52

5.72

39.30

51.40

24.60

NDF,% DM

438

33.19

4.81

32.70

51.80

19.50

ADF,% DM

340

20.73

3.89

20.20

37.40

11.20

RDP,% DM

116

10.64

1.17

10.60

13.17

6.89

RUP,% DM

103

7.36

5.20

6.30

33.70

4.40

Starch,% DM

174

23.82

5.77

23.30

39.20

9.50

NEL, Mcal/kg

249

1.62

0.08

1.61

1.80

1.40

Milk yield and composition

Milk yield, kg/d

442

34.53

6.76

35.55

50.90

15.70

3.5% FCM, kg

442

34.68

6.74

35.45

52.11

16.18

4.0% FCM, kg

442

32.08

6.23

32.79

48.20

14.97

Fat,%

442

3.57

0.51

3.53

5.93

2.16

Fat yield, kg

442

1.22

0.26

1.24

1.96

0.55

Protein,%

442

3.14

0.37

3.09

6.87

2.53

Protein yield, kg

442

1.06

0.22

1.09

1.73

0.47

MUN, mg/dl

242

13.63

4.34

13.01

35.80

6.77