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Milk Collection in the Rat Using Capillary Tubes and Estimation of Milk Fat Content by Creamatocrit
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Decreased milk yield is associated with delayed milk ejection.

R J Erskine1, B Norby1, L M Neuder1

  • 1Department of Large Animal Clinical Sciences, Michigan State University, East Lansing 48824.

Journal of Dairy Science
|April 30, 2019
PubMed
Summary
This summary is machine-generated.

Individual cow milking vacuum can identify delayed milk ejection, which is linked to lower milk yield. This finding suggests vacuum parameters can help improve herd productivity by monitoring milk flow.

Keywords:
delayed milk ejectionmilk flowmilk yield

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Area of Science:

  • Dairy science
  • Animal husbandry
  • Veterinary medicine

Background:

  • Delayed milk ejection, also known as bimodal milk flow, can impact milk yield.
  • Accurate monitoring of milk ejection is crucial for optimizing dairy herd productivity.

Purpose of the Study:

  • To assess if individual cow milking vacuum can replace milk flow technology for identifying delayed milk ejection.
  • To investigate the relationship between bimodal milk flow and milk yield in Holstein cows.

Main Methods:

  • Milking data were collected from 663 Holstein cows milked three times daily.
  • Multivariable analysis was used to examine associations between milking parameters, milk yield, and delayed milk ejection.

Main Results:

  • Delayed milk ejection occurred in 45.6% of milkings, with 98% exhibiting bimodal flow.
  • Milk yield was negatively associated with delayed milk ejection and increased lag time between unit attachment and milk letdown.
  • Each increase in lag time by 30 seconds decreased milk yield by 1.8 to 3.1 kg.

Conclusions:

  • Individual cow milking vacuum parameters can serve as a practical tool to estimate milk flow and identify delayed milk ejection within a herd.
  • Utilizing milking vacuum data can potentially enhance overall herd productivity by addressing issues related to milk letdown and yield.