SELKO TMR

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Selko TMR

Preserve the value of your dairy ration with Selko-TMR

The impact of elevated temperatures on quality of dairy feed

Fresh TMR for dairy cows contains yeasts, moulds and bacteria that can reduce the quality of the dairy ration. Growth of these micro-organisms leads to heating and fermentation, which reduces both the palatability and the feeding value of the ration. Particularly the easily fermentable proteins, carbohydrates and starch are fermented into water and CO2 (see Figure 1) reducing the dry matter and therefore nutritional value of the dairy feed.


Figure 1: Effect of fermentation on sugar level and dry matter percentage o an untreated TMR. Sugal level was reduced by 50% over a period of 24 hours.

Growth of micro-organisms and fermentation in TMR of dairy cows starts once the ingredients have been exposed to oxygen in the air and results in an increase of the temperature of the TMR. On a warm day in the summer, increases of more than 20°C are not uncommon. Once environmental temperatures start rising, performance of the dairy herd is under pressure for two reasons. Firstly, dairy cows could potentially suffer from heat stress resulting in a decrease of dry matter intake. Secondly, the reduction of palatability and feeding value resulting from heating of the TMR will lead to a further reduction of dry matter intake of dairy cattle.

How can we reduce the negative impact of yeasts, moulds and bacteria on dairy TMR?

The quality of the initial raw materials has a big impact on the level of yeasts, moulds and bacteria. Contamination at harvesting should be avoided as much as possible, and silages should be closed properly to reduce exposure to oxygen. Growth of micro-organisms can be reduced further by using silage preservation products.

Contamination of the raw material with micro-organisms can never be avoided completely. Once the silage is opened, there will be exposure to oxygen and moisture leading to replication of micro-organisms. Particularly if ingredients with a high moisture content are being used or if water is being added to the TMR, heating can become a serious problem. This is where Selko®-TMR for dairy cows comes in.

Selko-TMR, dosage and administration

Treating the TMR

The standard amount of Selko-TMR to be added to dairy feed is 1.5 liters of Selko-TMR per 1000 kg of TMR. Add 2 liters of Selko-TMR if the risk of fermentation and heating is high:

  • If grass silage with more than 45% of dry matter or corn silage with more than 38% dry matter is included in the TMR of dairy cattle
  • If the cutting edge of the silage is irregular
  • If water is being added to the dairy TMR
  • If the environmental temperature is above 21 °C
  • If the feeding frequency is once per 2 days
  • If a premix of ingredients is being made

Treating the cutting edge of the silage

When a silage is sensitive for fermentation and heating at the cutting edge, the surface can be treated with Selko-TMR in order to slow down the fermentation. Spray 0.25 liter of Selko-TMR per square meter cutting surface.

Treating the top layer of the silage

If moulding of the top layer of the silage is a problem, Selko-TMR can be used at a dose of 0.5 liter of Selko-TMR per square meter.

HealthyLife | solutions based on science

Increase your milk production by improving fibre digestibility

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Selko HealthyLife | Solutions based science

Manage heat stress to maintain dairy performance during this summer with Selko® LactiBute.

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for a free consult.

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Figure 2: Increase in temperature of a TMR treated with Selko-TMR compared to a TMR treated with potassium sorbate and a untreated TMR.

Selko-TMR for dairy

Selko-TMR is a blend of organic acids that reduces the growth of yeasts, moulds and bacteria such as Enterobacteriaceae like Salmonella. As a result of the reduction in growth of micro-organisms, increases in temperature of the TMR are delayed by at least 6 hours in TMR treated with Selko-TMR (see Figure 2).

Download more research and documentation

You can access all of our documentation such as the science behind HealthyLife research documents, HealthyLife technical bulletins about transition management and technical product data sheets or feeding schedules.

Preserve the value of your feed

Selko-TMR is a blend of organic acids reducing growth of yeasts, moulds, Enterobacteriaceae and Salmonella in silage of dairy cows. The reduction in growth of micro-organisms delays increases in temperature of the TMR for at least 6 hours, Silages treated with Selko-TMR maintain their feeding value and palatabilty, resulting in a higher intake of dry matter.

Download the product brochure to learn how Selko-TMR helps to preserve the value of your feed.

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