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Increased take-off level in automatic milking systems - effects on milk flow, milk yield and milking efficiency at
Sabine Ferneborg1, Måns Thulin2, Sigrid Agenäs3
1Department of Animal and Aquacultural Sciences, Faculty of Biosciences,Norwegian University of Life Sciences,P. O. Box 5003 NMBU, 1432 Ås,Norway.
Abstract:
This research communication describes how different detachment levels (0.48, 0.3 and 0.06 kg milk/min) at the quarter-level affect milk flow profiles and overall milking efficiency in automatic milking systems. We hypothesized a higher detachment level would result in greater mean flow rates without affecting the volume of harvested milk per cow during 24 h compared to lower detachment levels. The data suggest milk flow decreased to a rate below the overmilking limit within the 6-s delay time required for termination in all treatments, but the duration of overmilking was shorter for the greatest detachment level compared to the other treatments. We conclude that setting a detachment level at a greater milk flow rate reduces the duration of overmilking without affecting the amount of milk harvested when applied to cows in mid-lactation during quarter-level milking. We also suggest that the steepness of the decline phase of the milk flow curve might have a larger effect than the actual detachment level on the duration of overmilking.
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