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Comparison of Different Heard-health-parameters used in Dairy Herds concerning algorithm of

Comparison of Different Heard-health-parameters used in Dairy Herds concerning algorithm of Calculating and Workability. Heard-Health-Parameters. No Single-Health-Parameters concerning one animal

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Comparison of Different Heard-health-parameters used in Dairy Herds concerning algorithm of

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  1. Comparison of Different Heard-health-parameters used in Dairy Herds concerning algorithm of Calculating and Workability

  2. Heard-Health-Parameters • No Single-Health-Parameters concerning one animal • (Temp, Heart Rate, Respiratory Rate, Milk Yield measured on a day or longer period, Calving interval, Time to first service, SCC) • Concerning more animals in a herd (Culling Rate, Service Rate, Conception Rate, Pregnancy efficiency, Cows pregnant)

  3. Workability • Making sense • Unique • Fast • Low Costs

  4. sold

  5. Relation Amount a Amount b

  6. Proportion Part amount a Whole amount a

  7. Average

  8. Average and Time Average Time Does only make sense as a stock variable

  9. Events as Relation or Proportion Time

  10. Which fertility parameter make sense? • Calving interval • “In-Calf-Rates” • Conception rate • Submission rate

  11. Calving Interval • Can a herd have a calving interval? • Single cow parameter • How we can transform it to a herd parameter? • Mean calving interval? • Which cows in a herd? heifers? how we can put it in relation to a time period?

  12. What we look upon as fertility? • Amount of cows calving in a period of time? end of the pregnancies • Amount of cows conceiving in a period of time?start of the pregnancies • How to put it in relation to herdspecific parameters? Eligible, herdsize • How to put it in relation to time. Which calendar? • Gregorian, 21 day period

  13. The event time relationship • Rates, Flow variables, events per time telling you what happens in a period of time • Possible eventsstart of the pregnancies, served cows, culled cows • Gregorian calendar Months 28 – 31 days, quarter 60 – 62 days, year 365 to 366 days • 21 day period 21 different calenders, 17 .38 or 17.42 periods in a year.

  14. Pregnancy Rate 21 day period

  15. Pregnancy Rate Monthly

  16. Fertility Events • Conceptions (start of pregnancy) • Services Relations • Conceptions/Services /Time • Conceptions/ Herdsize/Time

  17. Stock variables in a time period • Herd size in February 2016: 29 days. 10 days x 100 cows, 10 days x 98 cows, 9 days x 101 cows. 2889 cow days/29 days = 99.62 • Cow days, heifer days, cow <= 63 days in lactation days, cow eligible to breed daysstart of the pregnancies, served cows, culled cows

  18. The 21 day period • 17 periods in a year confusing: days x 101 cows. 2889 cow days/29 days = 99.62 • How to get the 21 day period character?

  19. A cow counts every 21 days as 1 eligible cow. • Usual calculation: 1 cow 21 days in February 2017 counts 21/29 = 0.72 • How to get the 21 day period character? • cow 21 days in February 2017 counts 21/29 * 29/21 = 1

  20. Cow days Counts Cow 15 0.71 Cow 5 0.24 Cow 21 1 Cow 15 1.48 Cow 10 0.48 January 31 days

  21. “In calf rates cumulative”

  22. “In calf rates to DIM”

  23. Rates: • Culling Rates (all cows, cows -42, cows -64, calves -21 days, youngstock 12 to 56 weeks) • Fertility Rates (pregnancy rate, pregnancy efficiency, submission rate, conception rate, fertility rate) • Udder health Rates (scc per month, -new infections, cured –during lactations and over dry period) • Metabolism Rates (Milk per cow and day in lactation stages Percentage Fat content higher 5.1 percent -42 Dim, -84 Dim)

  24. Fertility

  25. Concieved /Time! Served Eligibles

  26. Conceptions Pregnancy Rate Eligible to conceive Conceptions served served Eligible to conceive Time

  27. Pregnancy rate Conceptions Eligible to conceive Time

  28. Fertility Rate Conceptions Cow Herd Size Time

  29. Submission Rate Served Eligible to conceive Time

  30. Conception Rate Conceptions Served Time

  31. Fertility Rate Yearly

  32. Fertility Rate Quarterly

  33. Fertility Rate Monthly

  34. Eligible Rates Yearly

  35. Eligible Rates Quarterly

  36. Eligible Rates Monthly

  37. Udder health parameter • SCC average values • Proportion Infected • Infection history lactation dry Period • When a cow deems as infected?

  38. When a cow deems as infected? • 140 k/ml in USA • 200 k/ ml in UK • 100 k/ ml in Germany • On from 100 k/ml composition changes • On from 120 k/ml no hard cheese

  39. Culling Parameters • Cows: lactation, lactation-stage • Youngstock: Grouping in ages • Breeds, Genetics

  40. The meaning of workable Herd-Health-Parameters • Making decisions on farm • Making conclusions in research

  41. Meaningful, unique, fast and low cost • Purchase software packages (check the criteria) • Do a lot yourself (with some training and some IT-Tools)

  42. How to do it? • Microsoft Office • Use some software tools that control Microsoft Office to calculate the figures and prepare the graphs.

  43. BCMS Data BCMS Data More than hundred in one go in minutes CDL FILES PDF MS Access MS EXCEL Download many in one go Farmers Data Farmers Data Vets Data Vets Data

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