Item

CG

AL

AM

AH

SEM

P-value

Milk yield (kg/d)

28.13

29.33

27.56

26.07

0.56

0.28

Protein yield (kg/d）

1.07

1.11

1.10

0.97

0.02

0.12

Milk protein (%)

3.80

3.86

3.99

3.86

0.05

0.49

Lactose yield (kg/d)

1.45

1.52

1.42

1.32

0.03

0.21

Lactose (%)

5.15

5.05

5.17

4.99

0.05

0.56

Fat yield (kg/d）

0.85

0.84

0.88

0.74

0.03

0.33

Fat (%)

3.09

3.13

3.23

3.09

0.12

0.98

MUN (mg/dL)

24.45^a

23.26^ab

23.40^ab

20.93^b

0.46

0.04

4% FCM (kg/d)

24.04

24.32

24.21

21.49

0.49

0.16

TS (%)

12.74

12.76

13.06

12.81

0.15

0.75

ECM (kg/d)

26.46

26.97

26.87

23.62

0.51

0.08

Milk NE_L (kg/d)

19.66

20.04

19.98

17,.55

0.38

0.97

Feed efficiency

1.29

1.41

1.28

1.25

0.03

0.16