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Milk flow-controlled changes of pulsation ratio and pulsation rate affect milking characteristics in dairy cows

Published online by Cambridge University Press:  02 March 2009

Sarah Ambord  and
Rupert M Bruckmaier
Sarah Ambord
Affiliation:
Veterinary Physiology, Vetsuisse Faculty, University of Bern, 3001Bern, Switzerland
Rupert M Bruckmaier*
Affiliation:
Veterinary Physiology, Vetsuisse Faculty, University of Bern, 3001Bern, Switzerland
*
*For correspondence; e-mail: [email protected]
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Abstract

To test a system with milk flow-controlled pulsation, milk flow was recorded in 29 Holstein cows during machine milking. The three different treatments were routine milking (including a pre-stimulation of 50–70 s), milking with a minimum of teat preparation and milking with milk flow-controlled b-phase, i.e. with a gradually elongated b-phase of the pulsation cycle with increasing milk flow rate and shortening again during decreasing milk flow. For data evaluation the herd was divided into three groups based on the peak flow rate at routine milking (group 1: <3·2 kg/min; group 2: 3·2–4·5 kg/min; group 3: >4·5 kg/min). Compared with routine milking, milking with milk flow-controlled b-phase caused a significant elevation of the peak flow rate and the duration of incline lasted longer especially in cows with a peak flow rate of >3·2 kg/min in routine milking. In milking with a minimum of teat preparation the duration of incline lasted longer compared with the two other treatments. Bimodality of milk flow, i.e. delayed milk ejection at the start of milking, was most frequent at milking with a minimum of teat preparation. No significant differences between routine milking and milking with milk flow-controlled b-phase were detected for all other milking characteristics. In summary, milking with milk flow-controlled b-phase changes the course of milk removal, however mainly in cows with high peak flow rates.

Keywords

Flow-controlled pulsationpeak flow rateb-phase
Type
Research Article
Information
Journal of Dairy Research , Volume 76 , Issue 3 , August 2009 , pp. 272 - 277
Copyright
Copyright © Proprietors of Journal of Dairy Research 2009

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References

Ayadi, M, Caja, G, Such, X & Knight, CH 2003 Use of ultrasonography to estimate cistern size and milk storage at different milking intervals in the udder of diary cows. Journal of Dairy Research 70 1–7CrossRefGoogle Scholar
Ayadi, M, Caja, G, Such, X, Rovai, M & Albanell, E 2004 Effect of different milking intervals on the composition of cisternal and alveolar milk in dairy cows. Journal of Dairy Research 71 304–310CrossRefGoogle ScholarPubMed
Bruckmaier, RM, Schams, D & Blum, JW 1994a Continuously elevated concentrations of oxytocin during milking are necessary for complete milk removal in dairy cows. Journal of Dairy Research 61 323–334CrossRefGoogle ScholarPubMed
Bruckmaier, RM, Rothenanger, E & Blum, JW 1994b Measurements of mammary gland cistern size and determination of the cisternal milk fraction in dairy cows. Milchwissenschaft 49 543–546Google Scholar
Bruckmaier, RM & Blum, JW 1996 Simultaneous recording of oxytocin release, milk ejection and milk flow during milking of dairy cows with and without prestimulation. Journal of Dairy Research 63 201–208CrossRefGoogle ScholarPubMed
Bruckmaier, RM 2005 Normal and disturbed milk ejection in dairy cows. Domestic Animal Endocrinology 29 268–273CrossRefGoogle ScholarPubMed
Gleeson, DE, O'Callaghan, EJ & Rath, MV 2004 Effect of liner design, pulsator setting, and vacuum level on bovine teat tissue changes and milking characteristics as measured by ultrasonography. Irish Veterinary Journal 57 289–296CrossRefGoogle ScholarPubMed
Hamann, J & Mein, GA 1996 Teat thickness changes provide biological test for effective pulsation. Journal of Dairy Research 63 179–189CrossRefGoogle ScholarPubMed
Mayer, H, Schams, D, Worstorff, H & Prokopp, A 1984 Secretion of oxytocin and milk removal as affected by milking cows with and without manual stimulation. Journal of Endocrinology 103 355–361CrossRefGoogle ScholarPubMed
Pfeilsticker, HU, Bruckmaier, RM & Blum, JW 1995 Interruption of machine milking in dairy cows: effects on intramammary pressure and milking characteristics. Journal of Dairy Research 62 559–566CrossRefGoogle ScholarPubMed
Pfeilsticker, HU, Bruckmaier, RM & Blum, JW 1996 Cisternal milk in dairy cow during lactation and after preceding teat stimulation. Journal of Dairy Research 63 509–515CrossRefGoogle ScholarPubMed
Sandrucci, A, Tamburini, A, Bava, L & Zucali, M 2007 Factors affecting milk flow traits in dairy cows: Results of a field study. Journal of Dairy Science 90 1159–1167CrossRefGoogle ScholarPubMed
Schams, D, Mayer, H, Prokopp, A & Worstorff, H 1984 Oxytocin secretion during milking in dairy cows with regard to the variation and importance of a threshold level for milk removal. Journal of Endocrinology 102 337–343CrossRefGoogle Scholar
Smith, VR & Petersen, WE 1946 The effect of increasing the negative pressure and widening of the vacuum-release ratio on the rate of removal of milk from the udder. Journal of Dairy Science 29 45–53CrossRefGoogle Scholar
Spencer, SB, Shin, JW, Rogers, GW & Cooper, JB 2007 Short Communication: Effect of vacuum and ratio on the performance of a monoblock silicone milking liner. Journal of Dairy Science 90 1725–1728CrossRefGoogle ScholarPubMed
Thomas, CV, Force, DK, Bremel, DH & Strasser, S 1991 Effects of pulsation ratio, pulsation rate, and teatcup liner design on milking rate and milk production. Journal of Dairy Science 74 1243–1249CrossRefGoogle Scholar
Weiss, D, Dzidic, A & Bruckmaier, RM 2003 Effect of stimulation intensity on oxytocin release before, during and after machine milking. Journal of Dairy Research 70 349–354CrossRefGoogle ScholarPubMed
Weiss, D, Weinfurtner, M & Bruckmaier, RM 2004 Teat anatomy and its relationship with quarter and udder milk flow characteristics in dairy cows. Journal of Dairy Science 87 3280–3289CrossRefGoogle ScholarPubMed