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The level of udder emptying and milk flow stability in Tsigai, Improved Valachian, and Lacaune ewes during machine milking

Author

Listed:
  • L. Mačuhová

    (Animal Production Research Centre Nitra, Nitra, Slovak Republic)

  • V. Tančin

    (Animal Production Research Centre Nitra, Nitra, Slovak Republic
    Slovak University of Agriculture in Nitra, Nitra, Slovak Republic)

  • M. Uhrinčať

    (Animal Production Research Centre Nitra, Nitra, Slovak Republic)

  • J. Mačuhová

    (Institute for Agricultural Engineering and Animal Husbandry, Poing, Germany)

Abstract

The objective of this investigation was to evaluate the stability of milk flow curves and the volume of residual milk in relation to milk flow curves in breeds Tsigai, Improved Valachian, and Lacaune (n = 16 heads per breed) milked twice daily. Milk flow type stability was evaluated at morning milking (stabile milkings) during three successive days in the middle of two months (June, July). After the following fourth morning milking (OT milkings) in both months, oxytocin was injected intravenously at a dose of 2 UI. Afterwards the ewes were milked again in order to remove residual milk. The milk flow curves were classified into four types: 1 peak (1P), 2 peaks (2P), plateau I (maximal milk flow over 0.4 l/min) (PLI), plateau II (maximal milk flow less than 0.4 l/min) (PLII). If all milk flow curves of one animal were of the same type within one month and within both months, respectively, the animal was characterized as the ewe with the stabile type of milk flow. Frequency of occurrence of single milk flow types (1P : 2P : PLI : PLII) during stabile milkings was 42 : 49 : 9 : 0% in June and 51 : 37.5 : 11.5 : 0% in July. 33 ewes (i.e. 69%) had the stabile type of milk flow within both months. But, more than 51% of them had 1P type of milk flow. Milk production varied according to milk flow curve during OT milkings (0.427 ± 0.015, 0.498 ± 0.024, and 0.655 ± 0.035 l for 1P, 2P, and PLI, respectively). The highest percentage of residual milk from total milk yield (RM/TMY) was observed in ewes with 1P (20.29 ± 0.85%), followed by ewes with PLI (12.31 ± 1.99%) and 2P (9.72 ± 1.36%) (P < 0.0001). Lacaune ewes had the lowest amount of residual milk (0.054 ± 0.006 l) and RM/TMY (9.86 ± 1.16%) compared to breeds Tsigai (0.088 ± 0.008 l; 16.47 ± 1.44%) and Improved Valachian (0.069 ± 0.010 l; 15.99 ± 1.78%) indicating their better udder emptying.

Suggested Citation

  • L. Mačuhová & V. Tančin & M. Uhrinčať & J. Mačuhová, 2012. "The level of udder emptying and milk flow stability in Tsigai, Improved Valachian, and Lacaune ewes during machine milking," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 57(5), pages 240-247.
    • Handle: RePEc:caa:jnlcjs:v:57:y:2012:i:5:id:5922-cjas
    DOI: 10.17221/5922-CJAS
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    References listed on IDEAS

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    1. M. Milerski & M. Margetín & A. Čapistrák & D. Apolen & J. Špánik & M. Oravcová, 2006. "Relationships between external and internal udder measurements and the linear scores for udder morphology traits in dairy sheep," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 51(9), pages 383-390.
    2. V. Tancin & J. Macuhova & D. Schams & R.M. Bruckmaier, 2006. "The importance of increased levels of oxytocin induced by naloxone to milk removal in dairy cows," Veterinární medicína, Czech Academy of Agricultural Sciences, vol. 51(6), pages 340-345.
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