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Effect of feed deprivation on daily water consumption in healthy horses.

饲料剥夺对健康马日耗水量的影响。

  • 影响因子:1.86
  • DOI:10.1111/evj.13259
  • 作者列表:"Freeman DE","Mooney A","Giguère S","Claire J","Evetts C","Diskant P
  • 发表时间:2021-01-01
Abstract

BACKGROUND:Measurements of water consumed by fed healthy horses might not apply to horses that are unwilling or unable to drink or are not fed for any reason. OBJECTIVE:To examine the effects of feed deprivation on voluntary water consumption compared with fed conditions. STUDY DESIGN:In vivo experiment. METHODS:Eight healthy adult Thoroughbred geldings were used in a randomised crossover design so that each horse served as its own control for fed vs feed-deprived conditions. Water intake, bodyweight, physical findings and vital signs were measured during 4 days of feeding and 4 days of feed deprivation. Daily measurements during the trial periods were PCV, TPP, electrolytes, osmolality and triglycerides. Plasma and extracellular fluid volumes were measured in the last 8 hours of the trial periods. Data were analysed with a two-way analysis of variance with repeated measures, and statistical significance was P ≤ .05. RESULTS:Feed deprivation immediately and persistently reduced water consumption to ~16% of fed values, with laboratory evidence of mild dehydration on day 4. MAIN LIMITATIONS:Changes in total body water and in water and electrolyte excretion or conservation through faeces and urine were not measured. CONCLUSIONS:Feed consumption has a marked effect on water requirements in healthy horses. Because current guidelines for water needs were obtained in the fed state, they might not apply to horses that are denied feed for any reason or have reduced feed intake. This study provides new information on water consumption in horses that should apply to this essential nutrient in health and disease.

摘要

背景: 测量被喂食的健康马消耗的水可能不适用于不愿意或不能喝水或出于任何原因没有被喂食的马。 目的: 比较饲料剥夺与喂养条件对自主饮水量的影响。 研究设计: 体内实验。 方法: 在随机交叉设计中使用八个健康的成年纯种马,以使每匹马作为其自身的饲养条件与饲料剥夺条件的对照。在喂养4天和饲料剥夺4天期间测量水摄入量、体重、身体发现和生命体征。试验期间的每日测量值为PCV、TPP、电解质、渗透压和甘油三酯。在试验期的最后8小时测量血浆和细胞外液体积。数据采用双向方差分析与重复测量进行分析,统计学意义为P ≤ 0.05。 结果: 饲料剥夺立即并持续地将水消耗降低至饲喂值的 ~ 16%,在第4天具有轻度脱水的实验室证据。 主要限制: 没有测量到全身水以及水和电解质排泄或通过粪便和尿液保存的变化。 结论: 饲料消耗对健康马的需水量有显著影响。由于目前的水需求指南是在喂食状态下获得的,因此它们可能不适用于因任何原因被拒绝喂食或饲料摄入量减少的马。这项研究提供了关于马的水消耗的新信息,这些信息应该适用于健康和疾病中的这种必需营养素。

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