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Mörk, Marie (2003) Introduktion av förstakalvare i AMS. Other thesis, SLU.

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Habituation to an automatic milking system (AMS) for cows in their first lactation differs from habituation to other milking systems. In AMS the cows are supposed to visit the milking station (MS) voluntarily. The milking takes place individually during the whole day, except when the milking system is cleaned. Milking is carried out without any human survey. The aim of the study was to describe the cow's introduction in AMS in their first lactation. Beside these questions, the questionnaire contained general questions concerning AMS and the answers to these questions are also presented in this paper. A questionnaire was sent to 48 farmers using AMS, having started production in AMS before first of April 2002. Thirty-six farmers answered and 33 questionnaires were finally used in the study. The questionnaire included questions about the system before AMS, a description of the AMS in question, housing of heifers before calving, introduction of heifers into AMS, diseases and injuries in the herd and finally a comparison between the production and quality of the milk before and after introduction of AMS. The questionnaire contained questions describing a major part of the production in AMS. This paper is focused on the introduction of cows in their first lactation. The study showed that heifers often were reared in loose housing system. They were usually moved to the herd before calving and they seemed to conform into the groups social order quite easily. Within a week after calving, most of the cows in their first lactation were being milked in AMS. Most cows only needed a few days up to a week to get used to the robot arm and within ten days after introduction, most first lactating cows visited MS voluntarily. Most of the farmers thought it was advantageous if the heifers had been in contact with MS before calving. Some farmers thought it was disadvantageous because proposed milking time were not used efficiently. Some cows did not visit the MS voluntarily and some cows could cause problem during milking in the MS but otherwise the introduction of first lactating cows were not considered to be a problem. The results showed that cows in their first lactation grew and produced as well in AMS as in the systems before AMS. The results indicated that cow traffic have a great influence on cows in their first lactation. The time when the heifers were introduced to the herd and when they started being milked in MS might have effected their habituation to AMS and milking in MS. Both frequency of diseases and cause of culling had changed slightly when comparing AMS to earlier systems.

Item Type: Thesis (Other)
Keywords: Mjölkko, automatisk mjölkning, tillvänjning, rangordning
Subject (faculty): Faculty of Veterinary Medicine and Animal Science > Dept. of Animal Nutrition and Management
Divisions: SLU > Faculty of Veterinary Medicine and Animal Science
Depositing User: Torsten Eriksson
Date Deposited: 01 Dec 2005
Last Modified: 18 Aug 2015 09:37
URI: http://ex-epsilon.slu.se/id/eprint/759

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