Hello, I wonder if the recording protocol A4 is suitable for once daily milking system. I think that a once daily milking underestimate the production of goat, and makes result incomparable with that in twice daily milking system. Best Regards
thank you for your answer Miljan, but we know that fat rate and protein rate, and quantity milked per day are not equal in the two systems (once daily milking and twice daily milking), so how we could compare 2 animals from different milking systems?
A published a small review on milking frequency in goats in Scientific Journal of Agricultural Advances, December, 2014, Volume 3, Issue 12. Can you browse that possibly it might help you.
Good luck
Hi Again, Hossem, Yes You can. A4 protocol normally aims to control the total milk production of a day by using to control one during morning and one during evening milking and to repeat this control approximately each month (6 control dates during lactation). In ODM milking system, it is naturally simplified and the sampling of the only daily milking qive you the true daily value of milk quality/quantity. BUT, be careful if you aim to calculate index, you cannot compare ODM and Twice daily milking performances. It is not the same milking system and twice daily always produce more milk than ODM due to modification of hormone and metabolite access to the gland and also down regulation of milk on its synthesis when udder is totally filled. Thus, you can compare animals in a same milking system (even with various milking regimen during lactation i.e. when breeder reduce milking frequency at the end of lactation when milk production decline) but not between animals not managed in the same system.because of the high variability of animals responses to ODM management, you cannot use any correction to make the data of performances comparable. best regards
Do you know, Hossem Sharaqi, the courbe of lactation of those sheep?
We know that " 65 to 80% tof he total sheep milk is until the 5th week of lactation". Ann. Zootech, v.18, n.2, p.169-184, 1969.
and
"... total milk production of ewes of groups I and II remained similar until the 8th lactation week" . The Journal of Agricultural Science, v.70,n.01, p87-94, 1968.
- Badges
- Science topic
- Similar topics
- Biological Science
- Biochemistry
- Biochemical Techniques
- Analytical Chemistry
- pH