Lactation Order Effects on Milk Production in Romanian Black and White Cows from Timiş County

Atila Bognar, Gavril Stanciu, Ludovic Toma Cziszter, Stelian Acatincăi, Iulian Tripon, Dinu Gavojdian, Simona Baul, Ramona Tetileanu

Abstract


Researches were carried out on 988 normal lactations of Romanian Black and White cows from the actual active population raised in Timiş County. Six groups of production were formed according to the lactation order: 1st, 2nd, 3rd, 4th, 5th, and 6th and over. For each group, the averages and dispersion indices were calculated, and the differences between groups were statistically tested. The highest production was obtained by cows in the 6+ lactation, 4979.2 kg milk with 3.921% fat and 3.26% protein, and the lowest in the first lactation 4455.4 kg milk with 3.944% butterfat and 3.195% protein. Milk production in the first lactation was significantly lower (p<0.05) than that produced by cows in the second, fifth and sixth lactations, by 495.9 kg milk and 16.98 kg protein; 477.9 kg milk and 17 kg protein; and 523.8 kg milk and 19.97 kg protein, respectively. Also, cows in the second lactation produced more (p<0.05) by 353.8 kg milk and 10.61 kg butterfat than cows in the third lactation.


Keywords


cows; lactation; milk; Romanian Black and White; Timiş

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Scientific Papers Animal Science and Biotechnologies publish open access articles under the terms of the Creative Commons Attribution 4.0 Licence (read full legal code).


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
Phone: +40-256-277160, Fax.: +40-256-277110