Type of teat cup liner and cluster ventilation affect vacuum conditions in the liner and milking performance in dairy cows

The optimal milking cluster should milk as gently possible to minimize the mechanical effect on teat tissue at an performance and quality. objective of this study was investigate influence liner shape (round vs. triangular) type ventilation (claw mouthpiece chamber; MPC) vacuum end in MPC. Our hypothesis that affect MPC vacuum. Six Holstein Friesian cows were milked twice daily over 12 d with a bucket milker, using 4 different types combined 3 system settings (35, 42, 50 kPa) incomplete randomized block design. Milk flow MPC, (measured short tube), pulse tube continuously recorded during milking. higher, hence main time shorter, round than triangular liners. lower liners, which caused by higher air leakage between barrel vacuum, well its cyclic fluctuations, increased (immediately before detachment) all types, highest amplitude fluctuation liners ventilation. reduced both milking, also peak flow. Despite observed differences did not performance. However, MPC-ventilated proportion foamed milk, could potentially have negative