The influence of milking with different vacuum levels and different design of liner on the change of teat surface temperature
1999
Kunc, P. | Knizkova, I. (Vyzkumny Ustav Zivocisne Vyroby, Prague-Uhrineves (Czech Republic)) | Koubkova, M.
The objective of this study was to investigate the dynamics of surface teat temperature changes in dependence on vacuum changes and changes of design of rubber liner by means of thermography. The teats of dairy cows were measured in 3 series (2 days): series A (evening milking): vacuum 45 kPa; series B (morning milking): vacuum 40 kPa; series C (evening milking): vacuum 45 kPa. In the experiments rubber liners with circular section with triangular section were used. The thermograms of measured teats were obtained in each experiment: 1. before milking, 2. immediately after milking, 3. two minutes after milking. The thermographic study of teat temperature responses to machine milking showed that milking causes considerable temperature changes in the teats. These teats are in direct contact with milking machine and they are strained during milking. However, after evaluation of all thermograms with a combination design of liners with circular section - vacuum 45 kPa vs. a combination design of liners with circular section - vacuum 40 kPa it was found that lower vacuum with these liners acted positively. The use of liners with triangular section did not reduce traumatization of teats by means of the changes of vacuum from 45 to 40 kPa.
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