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Table 2 Effect of slow-release urea (SRU) supplementation on nutrient disappearances and gas production in RUSITEC

From: Effect of commercial slow-release urea product on in vitro rumen fermentation and ruminal microbial community using RUSITEC technique

Item

Treatmenta

 

Pb

Control

U28

U56

MU35

SEM

L

Q

C vs. MU35

Digestibility, %

 DM

74.1

74.9

74.9

78.5

0.96

0.51

0.66

0.01

 OM

74.6

74.6

74.1

78.9

1.03

0.74

0.86

0.03

 CP

75.3

77.8

76.2

81.2

1.58

0.73

0.35

0.04

 NDF

45.7

43.4

45.3

51.9

2.46

0.93

0.56

0.10

 ADF

41.7

41.0

39.1

47.2

2.44

0.49

0.88

0.12

 Starch

98.6

98.5

97.9

98.4

1.11

0.18

0.10

0.23

Gas production, L/d

1.79

1.92

1.67

1.51

0.09

0.31

0.07

0.04

CH4, % of gas

4.22

4.34

3.85

4.34

0.39

0.30

0.32

0.81

CH4, mg/d

45.43

55.27

43.18

44.92

4.25

0.70

0.05

0.86

CH4, mg/g digested DM

6.18

7.18

5.64

5.60

0.55

0.51

0.08

0.42

  1. aControl (no SRU), U28 = control plus 0.28% SRU, U56 = control plus 0.56% SRU, and MU35 = control diet was modified by partially replacing soybean protein with 0.35% SRU (DM basis);
  2. bL, Q = linear and quadratic effects of SRU (control, U28 and U56); C vs. MU35 = Contrast between Control and MU35