Total digestible nutrients (TDN) are the common energy reference for both feed content and animal requirement, so how are the two connected and what can we know to better examine TDN of feedstuffs and use energy economically?
The initial measure of energy begins with gross energy (GE), which is the term for all energy contained within a feed and consumed by the animal. By subtracting all the energy that passes through to manure from GE, you get digestible energy (DE). Digestible energy is the measure of energy converted into TDN within feedstuffs.
