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Table 1 Experimental summary and chemical composition of the diets used in the study (% of DM unless otherwise stated)1

From: An artificial intelligence approach of feature engineering and ensemble methods depicts the rumen microbiome contribution to feed efficiency in dairy cows

   

United States

Item

Mean ± SD

CAN12

UF13

UF24

UF35

UF46

UF54

n

454 (total)

216

35

40

51

12

100

Rumen sampling, DIM

62 ± 3

64

60

60

60

66

60

First day, DIM

56 ± 15

42

50

50

50

85

61

Last day, DIM

105 ± 12

91

100

105

100

125

110

Total collection days

50 ± 3

49

51

56

51

40

49

DMI, kg/d

22.6 ± 2.60

24.2

22.2

23.9

20.9

21.3

23.1

Milk production, kg/d

40.4 ± 6.80

40.5

40.8

40.3

34.7

42.2

43.8

NESec, Mcal/d

27.1 ± 4.20

29.1

26.6

27.1

25.4

25.8

28.6

BW0.75, kg

127 ± 9.70

132

121

137

119

122

134

BEC, kg/d

2.60 ± 3.20

2.25

2.26

4.51

2.38

0.66

3.25

Chemical composition

       

OM

92.7 ± 0.61

93.4

92.1

92.5

92.4

93.7

92.8

CP

17.0 ± 0.88

15.8

16.8

17.7

18.4

16.3

16.9

 RDP1

10.9 ± 0.47

10.7

11.9

10.1

11.0

11.4

11.4

 RUP1

5.22 ± 0.13

5.10

5.40

4.90

5.20

5.00

5.20

NDF

28.6 ± 4.07

29.3

29.8

34.2

23.5

26.8

25.3

 Forage NDF

23.0 ± 2.63

25.6

18.4

19.3

21.6

18.2

22.5

Starch

30.5 ± 1.61

27.1

31.1

27.9

31.7

31.8

31.5

ADF

16.0 ± 3.02

19.4

16.6

18.3

15.7

10.7

15.1

NFC

43.1 ± 5.37

45.1

41.4

33.4

45.7

48.6

46.1

Ether extract

4.64 ± 1.59

3.63

4.10

7.27

5.44

4.26

4.26

NEL, Mcal/kg of DM

1.69 ± 0.03

1.68

1.67

1.74

1.70

1.73

1.65

  1. 1DIM = days in milk, DMI = dry matter intake, NESec = net energy secreted in milk, BW = body weight, BEC = body energy changes, OM = organic matter, CP = crude protein, RDP = rumen degraded protein, RUP = rumen undegraded protein, NDF = neutral detergent fiber, ADF = acid detergent fiber, NFC = non-fibrous carbohydrates, NEL = net energy required of lactation, kg = kilograms, and Mcal = megacalories, SD = standard deviation, CAN = Canada, UF = University of Florida (U.S.A.)
  2. 2Mion et al. (2023), DOI: https://doi.org/10.1093/jas/skad041
  3. 3Zimpel et al. (2021), DOI: https://doi.org/10.3168/jds.2021-20486
  4. 4Unpublished. Ingredient composition can be accessed in Supplementary Table 1
  5. 5Oyebade et al. (2023), DOI: https://doi.org/10.3168/jds.2022-22898
  6. 6Lobo et al. (2023), DOI: https://doi.org/10.3168/jds.2022-22583