Sources of variation in milk flow characteristics at udder and quarter levels

Journal of Dairy Science
V TancinJ Macuhová

Abstract

The aim of this study was to describe and analyze effects of parity, stage of lactation, milkability (3 groups of cows with differing peak flow rates), time of milking, and quarter position on milk production and milk flow measures at udder and quarter levels. Particular emphasis was put on changes to the decline phase and in duration of overmilking. More than 75,800 quarter milk flow curves and more than 19,300 udder milk flow curves obtained from 38 cows throughout lactation were analyzed. Stage of lactation significantly influenced all studied variables at both udder and quarter levels. At the quarter level, the duration of decline phase and the decline ratio (decline phase as a percentage of milking time) decreased from mo 1 to 2 and then gradually increased as lactation advanced. In contrast, at the udder level, duration of decline phase decreased throughout lactation but beginning at mo 2, the decline ratio increased as lactation advanced. The duration of the overmilking phase of quarters increased from mo 1 to 3 and then decreased in the course of lactation. Parity did not influence peak and average flow rates, the duration of increase phase, or the decline ratio at either udder or quarter levels. All milk flow measures ...Continue Reading

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Citations

Mar 14, 2014·The Journal of Dairy Research·Moufida AtiguiPierre-Guy Marnet
May 24, 2016·The Journal of Dairy Research·Sabine FerneborgKerstin Svennersten-Sjaunja
Nov 12, 2013·Journal of Dairy Science·J P EdwardsN Lopez-Villalobos
Apr 14, 2007·Journal of Dairy Science·V TancinP Hogewerf
Jul 3, 2013·Journal of Dairy Science·D P BerryM Burke
Oct 13, 2006·Journal of Dairy Science·R NitzanI Halachmi
Sep 30, 2009·The Journal of Dairy Research·Alberto TamburiniAnna Sandrucci
Oct 20, 2018·Animal : an International Journal of Animal Bioscience·C ChartonJ Guinard-Flament
Mar 5, 2016·Tropical Animal Health and Production·Pierre Guy MarnetMohamed Hammadi
Nov 25, 2019·Journal of Dairy Science·J C F PantojaG S Latosinski
Feb 14, 2007·Journal of Dairy Science·A SandrucciM Zucali
Oct 17, 2016·Journal of Mammary Gland Biology and Neoplasia·Francisco CeaceroLaureano Gallego
Jul 10, 2019·Animal : an International Journal of Animal Bioscience·M OdorčićR M Bruckmaier
Aug 28, 2020·Frontiers in Veterinary Science·Carlo BoselliAntonio Borghese
Aug 23, 2017·Scientific Reports·Patrick Gasqui, Jean-Marie Trommenschlager
Sep 26, 2019·Journal of Veterinary Pharmacology and Therapeutics·Andrew P Woodward, Ted Whittem
Feb 28, 2021·Animal : an International Journal of Animal Bioscience·D MeyerE Hartung
Jul 3, 2021·Animals : an Open Access Journal From MDPI·Matthias WielandAnja Sipka

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