International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 5, Issue:4, April, 2016

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : /
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(4): 287-296

Reproductive and Productive Indicators of Holstein-Friesian Cows Grown in Cubical Technology
Georgi Popov*, Zapryanka Shindarska and Iliya Ralchev
University of Forestry – Sofia, Faculty of Veterinary Medicine, Kliment Ohridski Blvd. 10
*Corresponding author

Reproductive and productive performances of Holstein - Friesian cows grown at cubic technology were studied. The study included 70 animals separated and aligned into groups according to number of lactation. The following reproductive parameters are traced: age of fertilization, age of calving, length of periods from calving to first heat and from calving to fertilization, number of inseminations, duration of pregnancy and calving period. From the productive parameters are researched: milk quantity for lactation, duration of lactation and dry period. The aim of the study is to establish productive and reproductive performances in Holstein-Friesian cows, at different lactation placed under the same technological conditions of feeding and breeding. The obtained results shows: extended duration for first, second, third and fourth lactation (respectively 347, 304, 326 and 316 days), increased number of insemination to fertilization (1,79; 1,39; 1,71 and 3,25 for each lactation), increased age of calving (35,5; 45,8; 60,7 and 73,2 months), extended period from calving to first heat (100,1; 81,6; 64,6 and 42,7 days), from calving to fertilization (141,6; 102,3; 126,7 and 125,7 days) and calving period (420,7; 381,4; 405,4 and 401,7 days) for the four lactations respectively.

Keywords: Production, Reproduction, Cows, Lactating Period, Sexual Cycle, Period from Calving to Fertilization.

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How to cite this article:

Georgi Popov, Zapryanka Shindarska and Iliya Ralchev. 2016. Reproductive and Productive Indicators of Holstein-Friesian Cows Grown in Cubical Technology.Int.J.Curr.Microbiol.App.Sci. 5(4): 287-296. doi:
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