Original Scientific Article
Milkability evaluation of jersey dairy cows by lactocorder
Tina Bobić,
Pero Mijić,
Vesna Gantner*,
Gjoko Bunevski,
Maja Gregić

Mac Vet Rev 2020; 43 (1): i - viii

10.2478/macvetrev-2019-0026

Received: 25 September 2019

Received in revised form: 28 November 2019

Accepted: 02 December 2019

Available Online First: 18 December 2019

Published on: 15 March 2020

Correspondence: Vesna Gantner, vgantner@fazos.hr

Abstract

Since there is not enough data about milkability of the Jersey cows, the aim of this paper is to show basic milkability traits of this cattle breed depending on the parity and milk flow curve types. Cows had average daily production (DMY) of 22.23 kg, milk yield per milking (MYM) of 9.72 kg, and average and maximum milk flow about 1.66 and 2.49 kg/min, respectively. Statistical analysis showed that DMY and MYM of the cows in 4th parity was significantly (p<0.05) higher comparing to cows in 1st and 3th parity. The duration of entirely milking is similar regarding the paritiesand only the cows in 3th and 4th differ significantly (p<0.05). Regarding the effect of milk flow curve, the significant (p<0.05) difference between unspecified and rectangular milk flow curve has been found for the average milk flow (AMF) and descending phase of the milk flow curve (TD). Cows with unspecified milk flow curve, have significantly (p<0.05) lower AMF and longer TD compared to cows with rectangular curve. Cows with bimodal milk flow curve have significantly (p<0.05) longer duration of the ascending phase compering to: unspecified, descending and rectangular. The results of this study have shown that Jersey cows have lower production and milk flow compared to other dairy cattle breeds. Nonetheless, they have uniform milkability traits, and a large representation of desirable milk flow curves which are associated with a beneficial effect on the udder health.

Keywords: Jersey cows, milkability, parity, milk flow curve types


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Copyright

© 2019 Bobić T. This is an open-access article published under the terms of the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Conflict of Interest Statement

The authors have declared that no competing interests exist.

Citation Information

Macedonian Veterinary Review. Volume 43, Issue 1, Pages i-viii, e-ISSN 1857-7415, p-ISSN 1409-7621, DOI: 10.2478/macvetrev-2019-0026, 2020