Treatment⁽¹⁾

P < ⁽²⁾

Item.

SS

SO

SS-FO

SO-FO

SEM

A

B

A × B

Milk, kg/d

8.90

10.10

8.60

9.70

0.53

0.07

0.47

0.97

4% FCM⁽³⁾, kg/d

6.90

8.10

5.80

7.90

0.63

0.04

0.39

0.47

Fat, g/kg

25.00

24.80

19.10

27.80

2.70

0.17

0.63

0.16

Protein, g/kg

38.70

40.70

35.40

40.4

0.90

0.01

0.11

0.15

Lactose, g/kg

48.20b

47.80bc

43.20c

49.20a

0.80

0.02

0.07

0.01

Protein/Fat

1.58

1.70

1.94

1.57

0.22

0.59

0.64

0.31

Fat, g/day

221

267

161

273

30.70

0.04

0.40

0.32

Protein, g/day

341

406

303

388

21.8

0.01

0.24

0.65

Cholesterol, mg/dl

2.88

2.44

2.46

2.41

0.16

0.18

0.22

0.27

Urea, mg/dl

2.01

1.95

2.18

1.93

0.04

0.02

0.14

0.09