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What the hay: predicting equine voluntary forage intake using a meta-analysis approach.
E M Leishman1, M Sahar1, S Cieslar2
1Centre for Nutrition Modelling, Department of Animal Biosciences, University of Guelph, Ontario N1G 2W1, Canada.
Animal : an International Journal of Animal Bioscience
|August 31, 2024
Summary
Accurate equine diet formulation requires precise estimation of voluntary forage dry matter intake (VFDMI). This study developed predictive equations for VFDMI based on animal traits and forage quality, improving nutritional management for horses and ponies.
Area of Science:
- Animal Science
- Equine Nutrition
- Nutrient Management
Background:
- Accurate estimation of feed intake is crucial for formulating equine diets and preventing nutrient imbalances.
- Existing predictive equations for equine forage intake are limited in scope.
- Individual variations in equine forage intake necessitate refined predictive models.
Purpose of the Study:
- To consolidate existing research on voluntary forage dry matter intake (VFDMI) in equines.
- To conduct a meta-analysis to identify key factors influencing VFDMI and sources of variation.
- To develop comprehensive predictive equations for equine VFDMI.
Main Methods:
- A systematic literature search identified 61 relevant publications.
- Data on forage intake, diet composition, and animal factors were extracted from selected studies.
- Linear mixed models were used for meta-analysis to identify driving variables for VFDMI.
Main Results:
- Forage quality (NDF, CP), forage type (grass, legume), animal size (horse vs. pony), and pasture access significantly influenced VFDMI.
- Higher quality forages and increased body weight (BW) led to higher VFDMI.
- Ponies exhibited a greater increase in VFDMI per unit of BW compared to horses.
Conclusions:
- Developed highly accurate predictive equations for equine VFDMI (CCC = 0.82-0.95).
- Animal traits and forage quality are significant determinants of VFDMI in equines.
- These equations can aid equine nutritionists and managers in precise diet formulation.
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