Variables

Control

Met-Lys

EE

P

Milk yield, kg cow⁻¹ day⁻¹

23.7

23.8

2.05

0.96

Yield of 4% FCM, cow⁻¹ day⁻¹

24.2

26.0

3.42

0.10

Milk lactose content, g/kg

45.9

47.4

0.69

0.08

Milk protein content, g/kg

30.4

31.1

0.692

0.159

αS1-CN, g/kg

9.44^b

10.58^a

0.593

0.046

αS2-CN, g/kg

2.55

2.94

0.582

0.125

β-CN, g/kg

9.58^b

10.35^a

0.592

0.050

κ-CN, g/kg

3.25

3.49

0.572

0.663

αLa, g/kg

1.13

1.20

0.702

0.159