Czech J. Anim. Sci., 2007, 52(5):117-121 | DOI: 10.17221/2234-CJAS

Effect of pre-stimulation on milk flow pattern and distribution of milk constituents at a quarter level

V. Tančin1, M. Uhrinčať1, L. Mačuhová1, R.M. Bruckmaier2
1 Slovak Centre of Agricultural Research, Nitra, Slovak Republic
2 Veterinary Physiology, Vetsuisse Faculty, University of Bern, Switzerland

The aim of this study was to investigate milk flow patterns and milk composition in relation to pre-milking udder stimulation. The milk of one quarter of each of the sixteen cows was removed separately and in the course of milking it was divided into six fractions (P – cisternal milk during milking without stimulation and the first 300 ml during milking with pre-stimulation, 0-25%, 25-50%, 50-75%, 75-100%, 75-100%, MS-machine stripping) and into five portions (25%, 50%, 75%, 100%, 100% + MS). Two milkings were performed during two consecutive evening milkings with or without manual stimulation. Pre-stimulation resulted in a reduction of milking time, duration of the increase and decline phase of milk flow, stripping yield, but it increased the peak flow rate as compared to milking without pre-stimulation (P < 0.05). In both fractions and portions the content of fat increased steadily during milking and reached a maximum at MS. Lactose increased from P to 50-75% and then it decreased to MS. Significantly higher fat contents at 25% and 50% portions and in both protein and dry matter at 25% portions were found during milking with pre-stimulation as compared to no stimulation (P < 0.05). The content of fat, protein and dry matter were also higher in both P and 0-25% fractions for milking with pre-stimulation (P < 0.05). Pre-stimulation positively influenced the parameters of milk flow and therefore the efficiency of milk removal and contributed to better distribution of components in milk fractions during milking.

Keywords: dairy cows; milking; stimulation, quarter; milk flow; milk constituents

Published: May 31, 2007  Show citation

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Tančin V, Uhrinčať M, Mačuhová L, Bruckmaier RM. Effect of pre-stimulation on milk flow pattern and distribution of milk constituents at a quarter level. Czech J. Anim. Sci.. 2007;52(5):117-121. doi: 10.17221/2234-CJAS.
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