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This study was carried out to investigate a new quarter-individual milking system calledMultiLactor<sup>®</sup> (Siliconform GmbH, Türkheim, Germany). The MultiLactor enables milking onquarter level basis with low vacuum (37 kPa), sequential pulsation and periodic air inlet.Within the same dairy farm, the influence of this quarter-individual milking system (MULTI)on milkability traits was compared with a conventional milking system (CON). CON wasequipped with a conventional milking cluster and used alternating pulsation. Vacuum levelwas adjusted to 40 kPa. For the study, 84 Holstein Friesian cows were randomly selected anduniformly divided into two herds. During the 30-week survey, the milk flow curves wererecorded every other week by using a LactoCorder (WMB, Balgach, Switzerland). Significantdifferences (P<0.05) between both milking systems were found for all milk flow traits, exceptfor milk yield and decline phase. Concerning the incline (tAN) and plateau (tPL) phase, largedifferences existed between MULTI and CON. The estimated value of tAN calculated forMULTI (29.4 s) took only half of the time when calculated for CON (56.4 s). The estimated valueof tPL at CON was reduced by 1.43 min (35 %) compared to MULTI. Milking process at MULTI(8.49 min) took longer time than for CON (7.43 min). From the study, it was concluded that theeffect of shorter tAN in the quarter-individual milked cows may be related to additional prestimulationby an actuator. In contrast, the longer milking time in MULTI is possibly caused bylower vacuum level and periodic air inlet

Comparison of the effects of quarter-individual and conventional milking systems on milkability traits