Abstract
The tested milker is a variable pulse rate milker which has the capability of selecting the pulse rate depending on the milk flow rate. We compared the constant pulse rate milker and the tested milker to clarify the milking performance. The tested milker effected the milk flow rate in 87% of the tested cows. The average milk flow speed ratio of the tested milker was 8% higher than that of the constant pulse rate milker. The milk flow rate of the tested milker reached its maximum in the first milking stage(0.5-3.5 L). The ratio was 9.9% higher than the average milk flow speed ratio, but the ratio gradually decreased as milking progressed. The tested milker was effective for the cows of slow milking flow rate; the average milk flow speed ratio was 34% higher than the constant pulse rate milker, and consequently, shortened the milking time.
