The influence of the change of dairy management system from the tie stall barn to the free stall barn with a milking parlour or with an automatic milking system on production performances
2003
Izumi, K. (Rakuno Gakuen Univ., Ebetsu, Hokkaido (Japan)) | Ozaki, K. | Nagase, T. | Hirano, A. | Matsubara, H. | No, E.
We investigated the influence of the change of dairy management system from the tie stall barn with a pipe-line milking system to the free stall barn with a milking parlour system (MP) or with an automatic milking system (AMS) on milk production and reproduction performance. Daily milk yield of the MP group was lower than the tie stall group (P<0.01), however that of the AMS group was significant higher than the tie stall group (P<0.01). The content of protein and solids-not-fat in milk both of the free stall groups increased significantly compared with the tie stall group (the protein percent of AMS group: P < 0.05; the other contents: P<0.01). The feeding amount of concentrate for the AMS group was significantly higher than the other groups (P<0.01). In both groups in the free stall system, the feed efficiency was lower than the tie stall group (P<0.01). The ratio of milk income to feed cost in the MP group was higher than the other groups (P<0.01). The reproduction performance of the two groups in the free stall system tended to be worth compared with the tie stall system. From this investigation, it was seemed that the changing over from the tie stall system to MP might be less efficiency for only a year. On the other hand, the introducing of AMS was effective about milk production.
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