Skip to main content

Table 2 Effects of the dietary treatments on feed intake, milk performance and methane production of the dairy goats

From: Long-term and combined effects of N-[2-(nitrooxy)ethyl]-3-pyridinecarboxamide and fumaric acid on methane production, rumen fermentation, and lactation performance in dairy goats

Item

Treatment1

SEM

P-value

CON

FUM

NPD

FN

Week

FUM

NPD

F × N

F × week

N × week

DMI, kg

1.70

1.70

1.81

1.70

0.080

0.005

0.465

0.511

0.495

0.190

0.958

DMP, kg

1.24

1.29

1.61

1.52

0.127

0.010

0.887

0.035

0.607

0.736

0.235

FCM, kg

1.30

1.19

1.59

1.37

0.125

0.207

0.213

0.085

0.662

0.569

0.259

DMP/DMI

0.73

0.74

0.89

0.90

0.063

0.001

0.862

0.021

0.974

0.915

0.128

FCM/DMI

0.76

0.69

0.87

0.81

0.065

0.046

0.310

0.091

0.912

0.713

0.160

NEL, MJ/d

3.77

3.41

4.45

3.84

0.349

0.171

0.183

0.131

0.724

0.628

0.213

Milk composition, %

 Fat

3.90

3.24

3.41

2.91

0.189

0.001

0.008

0.045

0.683

0.505

0.208

 Protein

3.87

3.65

3.26

3.20

0.168

0.001

0.412

0.007

0.633

0.963

0.029

 Lactose

4.15

3.97

4.10

3.97

0.128

0.062

0.248

0.825

0.842

0.736

0.239

 MUN, mg/L

3.92

3.89

4.03

3.50

0.172

0.157

0.125

0.435

0.161

0.238

0.997

Milk composition yield, g/d

 Fat

46.9

39.1

55.0

43.8

4.78

0.420

0.065

0.202

0.726

0.423

0.307

 Protein

46.0

43.7

52.2

48.4

3.57

0.005

0.409

0.152

0.839

0.758

0.258

 Lactose

52.0

52.0

65.7

60.3

0.91

0.006

0.642

0.076

0.651

0.950

0.115

Methane emissions

 CH4, L/d

32.7a

26.4b

28.3b

25.9b

0.91

0.031

0.030

0.036

0.081

0.142

0.342

 CH4, MJ/d

1.30a

1.05a

1.12a

1.03a

0.036

0.031

0.030

0.036

0.081

0.142

0.342

 CH4/DMI, L/kg

19.2a

15.6b

15.7b

15.3b

0.43

0.077

0.004

0.005

0.010

0.197

0.272

 CH4/FCM, L/kg

26.4

23.7

18.0

19.0

2.56

0.296

0.750

0.043

0.512

0.845

0.094

  1. 1Means by treatment was the pooled data from goats at weeks 3 and 9, n = 3 for the measurements related to CH4 and n = 6 for the others
  2. a,bMeans with different superscripts within a row differ (P < 0.05). The P-values for all the F × N × week. interactions were higher than 0.05, and they were not listed in the table
  3. CON Control, FUM Fumaric acid, NPD N-[2-(nitrooxy)ethyl]-3-pyridinecarboxamide, FN FUM+ NPD, DMI Dry matter intake, DMP Daily milk production, FCM Fat corrected milk, MUN Milk urea nitrogen, NEL Net energy for lactation, SEM Standard error of means