[Comportamento de vacas da raça Holandesa em ordenha robótica (Behaviour of holstein cows in robotic milking)]

ABSTRACT The aim of this study was to assess the ingestive behavior of concentrate and milking of dairy cows in automatic milking system (AMS) according to parity. The experiment was conducted from March to June 2014, in Castro, PR, with Holstein cows housed in a free stall, milked automatically, and classified according to the lactation order (1, 2 and +3 lactations). Data were extracted from the management software, considering the activities of one day a month (24 hours) for four months, the day after the official milk production control. The data were analyzed by multivariate analysis (factorial analysis, canonical and cluster), using the statistical package SAS. The ingestive behavior of concentrate influenced the entire activity of the cows in the AMS, being a fundamental factor in the performance of animals in this system. Parity did not influence the milking behavior, only the ingestive behavior, due to the social dominance of multiparous cows. High-yielding cows had a more aggressive ingestive behavior. It was concluded that parity influenced the ingestive behavior of concentrate, but does not interfere in milking behavior in cows with higher parity. In the AMS, primiparous should be managed in a specific group.

摘要 本研究旨在依据胎次，评估自动挤奶系统（Automatic Milking System, AMS）中奶牛的精料采食行为与挤奶行为。本实验于2014年3月至6月在PR州卡斯特罗市开展，试验对象为饲养于散栏式牛舍的荷斯坦奶牛，采用自动挤奶模式，并按泌乳胎次（1胎、2胎及3胎及以上）进行分组。研究数据从牧场管理软件中提取，选取每月官方牛奶产量检测次日的24小时活动数据，共覆盖4个月时长。本研究采用统计软件SAS，通过多元分析（含因子分析、典型相关分析及聚类分析）对数据进行处理。结果显示，精料采食行为对自动挤奶系统中奶牛的整体活动具有显著影响，是该系统下奶牛生产性能的核心影响因素。胎次对挤奶行为无显著影响，仅会影响采食行为，这源于经产奶牛的社会优势地位。高产奶牛的采食行为更具攻击性。研究结论表明，胎次会影响精料采食行为，但不会干扰高胎次奶牛的挤奶行为。在自动挤奶系统中，初产奶牛应单独分组进行管理。