STUDY ON DAYS OPEN IN A ROMANIAN BLACK AND WHITE COW POPULATION FROM HE WESTERN ROMANIA

A. BOGNAR, G. STANCIU, L.T. CZISZTER, S. ACATNCĂI, I. TRIPON, C. JULEAN, SIMONA BAUL, D. GAVOJDIAN, RAMONA TETILEANU

Abstract


The aim of the paper was to study the length of days open in Romanian Black and White cows according to county and parity. Researches were carried out on 3167 lactations obtained from 1200 cows reared in Timis and Caras-Severin counties. Average days open was 163.5 days (5 months and 11 days) for cows in Timis County and 122.7 days (4 months and one day) for cows in Caras-Severin County. The difference of 40.8 days in the favor of cows from Timis County was significant (p<0.001). The longest period of days open was obtained in primiparous cows both in Timis and Caras-Severin, being 174.6 days (5 months and 22 days) and 139.0 (4 months and 17 days), respectively. The shortest length of days open was obtained for both counties in the third parity, being 150.8 days (5 months and 4 days) and 112.9 (3 months and 21 days), respectively. In Timis County, primiparous cows had a significantly longer days open (p<0.05) compared to cows in second, third, fourth and seventh and over parities. There were no significant differences (p>0.05) for days open between parities for cows in Caras-Severin County.


Keywords


days open; cows; Romanian Black and White

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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
Bioengineering Faculty of Animal Resources
300645, Timişoara, Calea Aradului 119, Romania

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