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Table 7 Correlation estimates of milk total omega-3 FA concentration with pasture chemical composition and FA composition for the Entire, HMF, LMF and MMF herd categories

From: Comparison of milk and grass composition from grazing Irish dairy herds with and without milk fat depression

  

Correlation Estimates

Item

Entire

HMF1

MMF1

LMF1

 

(n = 94)

(n = 24)

(n = 42)

(n = 28)

Chemical composition (% of DM)

 Crude protein

0.12

-0.05

0.40*

-0.22

 NDF

-0.05

-0.29

0.05

0.06

 ADF

-0.15

-0.40†

-0.12

0.08

 WSC

0.04

0.04

-0.07

0.29

 Oil—Ether extract

-0.02

-0.2

0.02

0.11

 Total FA (mg/g DM)

0.22*

0.08

0.36*

0.12

FA (g/100 g FA)

 C18:2c9,12

-0.12

-0.02

-0.23

0.04

C18:3c9,12,15

0.02

-0.24

0.04

0.16

Total Saturated FA

-0.19†

-0.17

-0.21

-0.24

Total MUFA

-0.20†

-0.39†

-0.12

-0.27

Total PUFA

0.20†

0.22

0.2

0.25

Total Omega 3 FA

0.20†

0.19

0.23

0.21

Total Omega 6 FA

-0.12

-0.03

-0.24

0.05

Total Omega 7 FA

-0.15

-0.33

-0.03

-0.21

Total Omega 9 FA

-0.21*

-0.39†

-0.15

-0.27

Ratio Omega 3:Omega 6

0.19†

0.09

0.25

0.16

Ratio Omega 6:Omega 3

-0.18†

-0.06

-0.32*

-0.07

  1. 1HMF (> 3.95% milk fat) = High milk fat herds, MMF (3.31 – 3.94% milk fat) = Medium milk fat herds, LMF = Low milk fat herds (< 3.30% milk fat)
  2. †P < 0.10; * P < 0.05; ** P < 0.01; *** P < 0.001