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Table 3 Effects of Saccharomyces cerevisiae fermentation product on lactation performance of dairy cows fed corn stover-containing diet

From: Effects of Saccharomyces cerevisiae fermentation products on performance and rumen fermentation and microbiota in dairy cows fed a diet containing low quality forage

Itema

SCFPb, g/d

SEM

P-valuec

0

60

120

180

L

Q

W

T × W

DMI, kg/d

20.1

20.3

19.9

19.9

0.22

0.26

0.54

<0.01

0.92

Milk yield, kg/d

22.1

21.8

22.6

22.3

0.28

0.08

0.89

<0.01

<0.01

ECM, kg/d

25.4

25.8

26.0

25.7

0.35

0.52

0.35

<0.01

<0.01

Milk composition, %

 Fat

4.35

4.41

4.35

4.36

0.075

0.95

0.81

<0.01

<0.01

 Protein

3.41

3.44

3.41

3.44

0.039

0.74

0.87

<0.01

<0.01

 Lactose

4.78

4.79

4.73

4.75

0.036

0.33

0.87

<0.01

0.65

 Total solids

13.7

13.7

13.4

13.6

0.19

0.55

0.59

<0.01

0.98

 SCC, ×104

57.9

35.2

46.9

47.6

11.4

0.63

0.78

0.95

0.75

 MUN, mg/dL

13.9

13.8

13.9

13.8

0.37

0.84

0.86

<0.01

0.75

Initial BW, kg

654

643

670

651

13.7

0.78

0.47

  

BW gain, kg/d

0.17

0.22

0.15

0.05

0.14

0.62

0.27

  

BCS

2.98

2.77

2.99

2.80

0.10

0.47

0.94

0.04

0.20

Feed efficiency

1.28

1.28

1.32

1.28

0.025

0.17

0.50

<0.01

0.67

N conversion

24.7

24.3

25.2

25.1

0.21

0.04

0.82

<0.01

0.17

  1. aDMI = dry matter intake; ECM (energy-corrected milk, kg) = 0.3246 × milk yield (kg) + 13.86 × fat yield (kg) + 7.04 × protein yield (kg) [44]; SCC = somatic cell counts; MUN = milk urea nitrogen; Feed efficiency = kg of ECM/kg of DMI; BCS = body condition score; N conversion = kg of milk protein yield/kg of dietary crude protein intake × 100
  2. b Saccharomyces cerevisiae fermentation product (Diamond V Original XP, Cedar Rapids, Iowa, USA)
  3. cT = treatment effect; W = week effect; T × W = interaction between treatment and week; L = linear effect of treatment; Q = quadratic effect of treatment