Detect heating in silage in good time using short and long thermometers

Heat build-up in silage and the feed ration quickly leads to a loss of energy, palatability and, ultimately, milk production. As heat build-up is often only noticeable at a late stage, it is important to detect it objectively and at an early stage. The simultaneous use of a short and a long thermometer is a simple yet powerful tool for this purpose.

Two measurements, one clear diagnosis
By using a short thermometer (10–15 cm) and a long probe (50–80 cm) at virtually the same spot on the silage face, aerobic stability becomes apparent:

• Stable silage: the long probe measures the same or a higher temperature than the short one.
• Early heating: long probe 3–5°C cooler than the short one.
• Severe heating: long probe >5°C cooler than the short one

This temperature difference indicates active growth of yeasts and moulds on the surface, whereby valuable nutrients are converted into heat, CO₂ and moisture.

Application in the TMR
Heat build-up can also be detected in the mixed ration by comparing surface and deeper temperature measurements, for example at the feed fence or by placing the TMR in a bucket until the next feeding. A temperature difference of >5°C indicates instability and an increased risk of feed value loss, particularly in warm weather, with higher dry matter content or when water is added.

From measurement to action: Selko TMR
When temperature measurements indicate susceptibility to heating, intervention is necessary. Selko TMR helps inhibit the growth of yeasts, moulds and enterobacteria in the ration. This keeps the TMR fresh and stable for longer, whilst maintaining dry matter content and intake. To measure is to know – and targeted protection of the ration pays immediate dividends in feed efficiency and performance.