The Effects of Teat End Hyperkeratosis and Body Dirtiness Scores on Milk Yield and Quality in Holstein-Friesian Cows
The Effects of Teat End Hyperkeratosis and Body Dirtiness Scores on Milk Yield and Quality in Holstein-Friesian Cows
Frederic Ndihokubwayo and Atakan Koç
ABSTRACT
In this study, the effects of the body dirtiness score (BDS) and teat end hyperkeratosis score (TEHS) on milk yield and quality in Holstein-Friesian (HF) cows were determined. In the study, a total of 432 cows raised in 9 different dairy cattle farms in Aydın Province, Turkey, were inspected. In addition to measure milk yield (MMY, kg), the milk samples were taken from these cows during the morning milking for the determination of fat content (FC, %), non-fat dry matter content (NFDMC, %) and somatic cell count (SCC, cell/ml). The means for BDS, TEHS, MMY, FC, NFDMC and Log10SCC were 3.30±0.048, 2.17 ± 0.038, 13.92 ± 0.315 kg, 3.58 ± 0.039%, 10.14 ± 0.032% and 5.22 ± 0.024 (165 958 cells/ml), respectively. The effects of farm and parity (P < 0.01) on BDS and the effects of farm (P < 0.01), parity (P < 0.05) and lactation stage (P < 0.01) on TEHS and the effects of farm and lactation stage on MMY (P < 0.01) were statistically significant. Considering the milk quality traits, the effect of farm on FC (P < 0.01); the effects of farm, parity, calving season and lactation stage on NFDMC (P < 0.01) and the effects of farm, parity and TEHS on Log10SCC (P < 0.01) were found statistically significant. The Log10SCC positively correlated with the TEHS (r = 0.24; P < 0.01), but its correlation with BDS is very low (r = 0.07; P > 0.05). As a result, the BDS having no significant effect on milk yield and quality, the regular inspection of the TEHS could contribute to the amelioration of raw milk quality and decrease the SCC level in the milk.
To share on other social networks, click on any share button. What are these?
