Milk flow-dependent vacuum loss in high-line milking systems: effects on milking characteristics and teat tissue condition

Journal of Dairy Science
Sarah Ambord, Rupert M Bruckmaier

Abstract

To study the effects of a milking system that partially compensates for milk flow-dependent vacuum loss compared with a standard (high-line) milking unit in a tie-stall barn, milk flow and vacuum patterns were recorded in 10 cows during machine milking with 2 milking systems in a crossover design for 7 d each. Before and after each treatment period postmilking teat condition was recorded by ultrasound cross-sectioning. Additionally, 2 methods to measure teat tissue condition were compared: longitudinal teat ultrasound cross-sectioning and teat tissue density measurements with the spring-loaded caliper (cutimeter method). The partial compensation of milk flow-dependent vacuum loss caused an elevation of the peak flow rate (4.74+/-0.08 vs. 4.29+/-0.07 kg/min) and a shorter duration of plateau (1.57+/-0.06 vs. 1.96+/-0.07 min) compared with the standard milking system. Total milk yield, duration of incline and decline of milk flow, average milk flow, time until peak flow rate, main milking time, and total milking time did not differ between treatments (overall means: 13.75+/-0.17 kg; 0.65+/-0.01 min; 2.88+/-0.09 min; 2.82+/-0.05 kg/min; 1.65+/-0.03 min; 5.23+/-0.09 min, and 5.30+/-0.10 min, respectively). The vacuum drop in the sh...Continue Reading

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Citations

Aug 2, 2012·The Journal of Dairy Research·Alberto ManzurCristòfol Peris
Sep 5, 2015·Animal Science Journal = Nihon Chikusan Gakkaihō·Masafumi EnokidaniKazuhiro Kawai
Apr 7, 2015·Journal of Dairy Science·J Bueso-RódenasJ R Díaz
Dec 2, 2014·The Journal of Dairy Research·Angela Gabriella D'AlessandroGiovanni Martemucci
Nov 29, 2016·Animal Science Journal = Nihon Chikusan Gakkaihō·Masafumi EnokidaniAiko Watanabe
Nov 6, 2017·Journal of Dairy Science·J F PenryD J Reinemann
Sep 21, 2017·The Journal of Dairy Research·Anna-Lena NeuheuserRupert M Bruckmaier
Aug 23, 2017·Scientific Reports·Patrick Gasqui, Jean-Marie Trommenschlager
May 25, 2021·Journal of Dairy Science·Claudia StaufferRupert M Bruckmaier

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