Changes of the utilization of trough, stall and automatic milking machine after the transfer cows to automatic milking system
2001
Morita, S. (Rakuno Gakuen Univ., Ebetsu, Hokkaido (Japan)) | Komiya, M. | Izumi, K. | Oikawa, K. | Hoshiba, S.
The objective of this study was to assess the changes in the use of trough, stall, and automatic milking machine by 19 cows transferred from tie-stall housing to free-stall housing equipped with automatic milking machine. The number of cows fetched daily decreased sharply from the day of transfer to Day 13 after transfer and continued to decrease to the end of the experimental period (90 days). The average number of daily milkings was significantly (P < 0.05) lower between post-transfer Days 1 and 10 than any other period. With the increasing number of days after transfer, the percentage of milkings rose during the periods 0 to 3 o'clock, 8 to 11 o'clock, and 20 to 23 o'clock and declined during the periods 4 to 7 o'clock, 12 to 15 o'clock, and 16 to 19 o'clock. With the cows' adjustment to the percentage of milkings at midnight (20 to 23 o'clock, 0 to 3 o'clock), as a feature of the automatic milking system, spreading the milkings over the day became fixed in a month after transfer to the new housing system. The time the cows spent reclining in the stall and eating was 80% greater on Day 3 than on Day 82.
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