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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