AHLU (Accumulated Heat Load Unit)
AHLU (Accumulated Heat Load Unit) is a measure of the amount of heat that may be stored in a body.
An animal’s “heat energy balance” is determined by the duration of exposure above the HLI Threshold. Cattle may accumulate heat during the day (the body temperature rises) and dissipate this heat during the night. If there is insufficient night cooling, cattle may enter the following day with an accumulated heat load. This is the AHLU value.
The AHLU Risk Level is displayed on the Cattle Heat Risk dashboard as the colours highlighting the AHLU values. This is based on the AHLU, panting scores and risk of a heat event, as shown in the below table:
