1) The document presents research on the relationship between milk production and age in Holstein-Friesian dairy cows. 2) Data was collected from 40 randomly selected cows at Givat Hayyim Dairy farm over 30 days, measuring milk production and age. 3) The results show that milk production increases with age up to around 4-5 years of age, after which production declines, indicating a polynomial relationship between milk production and age.

1. Life age vs Milk production
Holstein Friesian cow
GROUP II
Givat Hayyim Dairy farm
Supervised By Mr. Dan Bachrach
CLASS III

2. Presentation outline
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Israel Holstein-friesian cow
•
Factors affecting milk quantity and quality
•
Research question
•
Objectives,hypothesis
•
Methodology
•
Research results, Analysis and discussion
•
Limitations, conclusion, questions and
acknowledgements.

3. •
highest milk producers
•
distinctive black and
white spots
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from local breeding stock
•
Israel Genetic
Improvement system.
Israel Holstein Friesian Cows

4. Factors affecting milk quantity and quality in
Holstein Dairy cows.

Age.

Individuality.

lactation stage.

Breed.

Estrus.

Pregnancy.

Temperature.

Humidity

5. Age..
“How does the milk production in
the Israel Holstein-Friesian
cow correlate with its
age???”

6. Hypothesis:
Milk production in Holstein-Friesian dairy cows correlates positively with the
age up to a maximum and there after a negative correlation occurs.
Main objective
To determine,

the correlation between the age and milk production in Holstein-Friesian
dairy cows.
Other objectives

the age at which Holstein-Friesian cows first calve down

daily average maximum milk production per cow

age at which a Holstein Friesian cow reaches its highest peak in milk
production.

7. Methodology.
Work plan,.
activity period personality
planning 24-28th/11/2014 Group 2 members
Research proposal writing 30th -27th 2014 Group 2 members
Submission of proposal 29/12/2014 Omia Razaki Iganachi
Data collection January 2015 Bunanyike Collins
Statistical analysis and
report writing
Feb-May 2015 Group 2 members
Report submission June 2015 Omia Razaki Iganachi
Preparation of a Power
point presentation
July 2015 Precious and Isaac
Presenting the power point August 2015 Group 2 members

8. Data collection;
GIVAT HAYYIM DAIRY FARM.
meuhad Kibutiz
over 480 lactating Holstein Friesian
cows on this farm.
sample space, 40 cows
(partriated in a month's time)
Randomly selected.
•
fed at the same time,
same type and
proportion of feed,
•
same milker, milking
machine and time of
milking.
•
for 30days - daily data
collection.

9. Results.
Lactation Tag Average Daily Age in Age in years
number milk(ltrs) months
2 4,612,186 46.20 37.30 3.11
2 4,613,387 49.40 37.7 3.14
2 4,613,090 45.90 37.70 3.14
2 4,613,072 55.40 38.40 3.20
2 4,604,974 47.80 39.00 3.25
2 4,606,386 53.70 39.20 3.27
2 4,605,635 48.60 39.30 3.28
3 4,597,758 51.00 49.70 4.14
3 4,612,605 47.40 50.50 4.21
3 4,602,821 52.20 50.80 4.23
3 4,613,561 53.50 51.10 4.26
3 4,612,515 51.80 51.70 4.31
Givat Hayyim Dairy farm

10. Average daily milk yield by Lactation number of
a Holstein dairy cow.

11. Average Dairy Milk in Litres by Age in months of a
Holstein Dairy cow.

13. Discussion of results
Factors that lead to the
increase in milk yield in
relation to age.

Digestive system/rumen
size increases

Mammary gland development.
Udder development – increase cell
size and numbers (Alveoli )
increase in milk.

Body weight gain.

14. Result Discussion cont'd
Factors that lead to the
decrease in milk yield in
relation to age.
With time,
a) milk secreting cells
degenerates (Alveoli)
b) Fertility problems
Retained placenta,
anoestrous
metabolic diseases (ketosis)
c) Incidences of diseases
Mastitis

15. Conclusion
•
Milk yield in Holstein-Friesian dairy cows
correlates positively with the age up to a
maxmum and there after a negative correlation
occurs at the age of 4-5 years.(polynomial
relationship)

16. Recommendations.
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Attention to fertility
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Grouping animals ( maturity time)
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Culling older animals (after 4-5 calving)
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Proper management practice (Feeding, health
care for early maturity.

17. Questions??

18. Acknowledgements.
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We acknowledge all our lecturers
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Mr. Dan Bachrach, and Agrostudies team
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Givat Hayyim Farm
•

19. THANKS TO YOU