Effects of lactation month and season on test-day milk yield and milk components in Holstein cows

DOI: 10.18805/ijar.11464    | Article Id: B-555 | Page : 952-955
Citation :- Effects of lactation month and season on test-day milkyield and milk components in Holstein cows .Indian Journal Of Animal Research.2017.(51):952-955

Özden Çobanoglu, Eser Kemal Gurcan, Soner Çankaya, Ertugrul Kul, Samet Hasan Abaci and Mehmet Ülker
 

ertugrul.kul@ahievran.edu.tr
Address :

Department of Animal Science, Faculty of Agriculture, Ahi Evran University, Kirsehir

Submitted Date : 23-06-2016
Accepted Date : 28-07-2016

Abstract

This study aims to determine the correlations between the test-day milk yield (TDMY) and the fat and protein content as well as the fat and protein yields in Holstein dairy cows and to investigate the effects of lactation period and sampling season on these parameters. The study material consists of 1.380 records of a total of 151 head of Holstein dairy cows raised on a private farm in Samsun province. In the study, the mean TDMY, fat content, protein content, fat yield and protein yield were recorded as 20.6±5.10 kg, 3.97±0.734%, 3.23±0.276%, 0.81±0.210 kg and 0.66±0.160 kg, respectively. The effects of lactation period and sampling season on the TDMY, fat content, protein content, fat yield and protein yield were found statistically significant (P<0.01). Statistically significant negative correlations were determined between the TDMY and the fat and protein content, but positive and statistically significant (P<0.01) correlations between the TDMY and the fat and protein yields. In conclusion, it might be stated that the effects of lactation period and sampling season should also be taken into account to improve milk yield and milk components.

Keywords

Fat content Holstein Lactation period Protein content Test-day milk yield.

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