Variability of milking frequency and intervals between milkings in milking robots.

摘要

The aim of the research is to state in what way the voluntary visiting principle of milking robots implements robots with milking cows. The research was performed on the training and research farm of the Latvia University of Agriculture 'Vecauce' where the cows are milked in two company 'DeLaval' milking robots VMS; for guiding the cows to the robots the selectively guided cow traffic feed first system is applied. In order to ensure milking of the cows that are not milked during the planned time they are driven to the robot waiting box by the cattle breeder on duty in his leisure hours. All the data necessary for the research were obtained during seven days from the robot management system. There were 87 cows in the research group with the average milk yield of the herd 7,000kg/year. The research results showed that while milking in robots the programmed milking frequencies and intervals between milking did not materialize. The milking frequency reduces but the intervals between milking increase. The intervals between milking vary in a very wide range and their variations have irregular character. Milking delays in 50% of cases do not exceed two hours, but there are cases when they last for eight hours and more. On analyzing the research results it can be concluded that to ensure a successful milking process an important role is played by the person who drives the cows that are not milked in the planned time to the robot. The question what influence on the productivity of animals do the variable intervals between milking that often considerably exceed the set values have remains open.