FIRST CALVING AGE EFFECT ON MILK PRODUCTION OF FRIESIAN – ROMANIAN BLACK SPOTTED COW BREED IN TRANSYLVANIAN FARMS

G. ONACIU, GABRIELA CRIŞAN, DANIELA CRIŞAN

Abstract


Obtaining higher quantitative productions, of superior quality and in maximumeconomical conditions, is determined by the high biologic material’s characteristicsand parameters. Researches carried out on a 294 heads of primiparous cowspopulation, establish the first calving age effect on the phenotypic characteristics ofthe milk production in the first lactation and its economical implications in theimprovement process of the Friesian – Black Spotted cow population, raised inconditions of private farms from 3 counties from Transylvania: Bihor, Cluj, andMureş. The obtained results demonstrate the fact that the studied primiparous cowshad a first calving age that exceeds with 35-42% the average values expected andpredicted for this breed. The population was studied and structured on 5 agegroups, presenting significant differences regarding the milk production obtained inthe first and the following age groups. Starting with the 850-950 days group, themilk production had values near the average production of the primiparous cows,realized at the farm level. This indicates a prolongation of the investment periodwith unjustified economical and financial implications. The first calving age valuescan be reduced by adopting adequate technical and organizational procedures andby giving the right importance to the replacement heifers.

Keywords


first calving age; quantitative milk production; primiparous cows

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LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Faculty of Animal Science and Biotechnologies
300645, Timişoara, Calea Aradului 119, Romania

E-mail: spasb [at] animalsci-tm.ro
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