Influence of quarter-individual milking in a conventional milking parlor on milk constituents of dairy cows

摘要

To evaluate the effect of milking with single tube guidance (MULTI) in comparison with conventional milking clusters (CON), various milk parameters were analyzed in foremilk samples. The two milking systems had the following technical configurations:milking vacuum was set to 37 kPa (MULTI) and 41 kPa (CON), respectively. Pulsation ratios were 65:35 (MULTI) and 60:40 (CON); both milking systems worked with a pulsation rate of 60 cycles/min. Furthermore, MULTI allowed periodic air inlet into the pulsation chamber of the teat cups (BioMilker~R) and used sequential pulsation. For the experiment, 57 German Holstein cows were randomly allocated to two groups (group 1: exclusively milked with MULTI, 28 cows; group 2: exclusively milked with CON, 29 cows).Foremilk samples were analyzed for fat, lactose, electrical conductivity (EC) and somatic cell count (SCO. Milking system could not be found to have a significant effect on the analyzed parameters. The fixed effect trial week had a significant effect onall examined traits. Furthermore, parity showed a sigifi-cant impact on most investigated traits with exception of EC, and the covariable day in milk (DIM) showed a significant impact on fat, lactose and EC. In summary, milking with single guided milk tubes did not change the percentage of milk components (fat, lactose) and the level of milk characteristics (EC, SCO, compared with conventional milking.