Variable

Control

Met-Lys

EE

P<

Chemical composition of the diet

Crude Protein, % total DMI

17.8^b

18.4^a

0.07

<0.001

NDF, % total DMI

42.7

42.3

1.80

0.66

EE, % total DMI

3.43^b

3.83^a

0.07

0.004

TDN, % total DMI

66.5

67.3

1.86

0.39

NE_L, Mcal/kg total DMI

1.49

1.50

0.02

0.60

DMI, kg cow⁻¹ day⁻¹

Pasture

11.5

11.9

2.67

0.58

Concentrate

7.58

7.56

0.57

0.97

Total

19.1

19.6

1.30

0.69

Protein Intake and Amino Acid Supply

Protein, g DM cow⁻¹ day⁻¹

3476

3525

233

0.84

Met supply, g DM cow⁻¹ day⁻¹

79.7^b

165ª

7.47

0.006

Lys supply, g DM cow⁻¹ day⁻¹

193^b

264ª

15.6

0.006