Digestibility Coefficient of Organic Matter (DCOM)
Definition
The Digestibility Coefficient of Organic Matter (DCOM) is a measure expressed as a percentage that indicates how much of the organic matter in a feed is digested by the cow and how much passes through the digestive system and is excreted in the manure.
Importance
Digestibility is a key indicator of feed quality and efficiency. A higher digestibility coefficient means:
- Better nutrient utilisation: More energy and nutrients are absorbed by the cow.
- Improved milk production and growth: Efficient digestion supports optimal performance.
- Reduced waste: Less undigested material in manure improves environmental sustainability.
Factors Affecting Digestibility
Several factors influence the digestibility of organic matter in feed:
- Feed composition: Fibre content, lignin levels, and processing methods.
- Animal health and physiology: Rumen function and microbial activity.
- Feeding practices: Balance of roughage and concentrates, feed particle size.
Role in Feed Evaluation
The DCOM is widely used in ration formulation and feed analysis to:
- Compare different feedstuffs.
- Optimise diets for maximum energy extraction.
- Monitor feed efficiency and adjust feeding strategies.
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