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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39 For more details click here
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2016.5(3): 254-259
DOI: http://dx.doi.org/10.20546/ijcmas.2016.503.031


Influence of Age at First Calving on Milk Quantity at Holstein-Friesian Cows
Zapryanka Shindarska*, Georgi Popov and Iliya Ralchev
University of Forestry – Sofia, Faculty of Veterinary Medicine, Kliment Ohridski Blvd. 10, Bulgaria
*Corresponding author
Abstract:

A study has been held in two farms (A and B) with cows of Holstein-Friesian breed. The farms included in the study are divided in diet and breeding. The animals were divided into groups according to age at first calving. The age of first calving for each group in the two farms has been traced. This study aims to track the age of first calving in cows of Holstein-Friesian breed and milk quantity on first lactation in both farms. The survey results indicate an optimal age for first calving at Farm A - 24 months of age, and for Farm B - 29 months of age. In the respective ages the total milk is highest.


Keywords: Heifers, Age at first Calving, Production, Milk, Lactation
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How to cite this article:

Zapryanka Shindarska, Georgi Popov and Iliya Ralchev. 2016. Influence of Age at First Calving on Milk Quantity at Holstein-Friesian Cows.Int.J.Curr.Microbiol.App.Sci. 5(3): 254-259. doi: http://dx.doi.org/10.20546/ijcmas.2016.503.031