Skip to main content

Table 4 Effect of breed, class of somatic cell counts, farm on cortisol concentration in milk and plasma (ln of pg/ml) of dairy cows in study 1. The model includes the linear effect of days in milking (DIM) and milk yield (kg/d)

From: Factors affecting milk cortisol in mid lactating dairy cows

 

Milk

  

Plasma

 

Mean

Se

Mean

Se

Breed

    

IH

5.77

0.06a

7.81

0.11Ns

IS

5.62

0.07b

8.02

0.08Ns

Class

    

#1

5.72

0.05Ns

7.84

0.09Ns

#2

5.55

0.15Ns

8.01

0.16Ns

#3

5.70

0.05Ns

7.90

0.07Ns

Farm

    

FA

5.83

0.08A

8.24

0.10A

FB

5.44

0.09B

7.84

0.11B

FC

5.61

0.11B

7.27

0.12C

FD

5.92

0.06A

8.31

0.13A

DIM

−0.002

0.001Ns

−0.001

0.002Ns

Milk yield

0.010

0.007Ns

−0.006

0.011Ns

General Mean

5.72

0.06

7.98

0.09

  1. IH Italian Holstein, IS Italian Simmental. FA to FD farm A to farm D, se standard error. DIM days in milking. Covariates appearing in the model are evaluated at the following values for Milk and Plasma cortisol of experiment 1: DIM = 142.25, Milk, kg/d = 33.61
  2. a, b on the same column denote significant differences for P < 0.05; A, B, C on the same column denote significant differences for P < 0.01; Ns: not significant