Selko Renergy®

Feed efficiency measures biological output of dairy cattle, the amount of energy-corrected milk per kg of feed consumed. It is calculated by dividing the amount of energy-corrected milk (ECM) by the dry matter intake (DMI). Sometimes the diet that has the highest feed efficiency is also more profitable, but this is not always the case. Production efficiency looks at the biological output per amount of money spent on feed. Production efficiency of dairy cows is sensitive to both changes in feed efficiency and changes in ingredient costs. It is therefore more predictive of dairy farm profitability than feed efficiency.

Product application

Benefits

Enhancing rumen function to increase propionate production
Improving production efficiency via a more efficient feed to milk conversion

Selko Renergy

Maximize the efficiency of your dairy operation

Production efficiency of dairy cows is key to profitability. By increasing the amount of milk produced relative to the cost of feed, you can significantly improve your income over feed costs. Selko Renergy is the innovative solution to help you achieve this by:

The difference between feed efficiency and production efficiency of dairy cows

Feed efficiency of dairy cows starts with optimising energy supply to the udder

Figure 1, Glucose demand and supply of dairy cows between 21 days before and 21 days after calving.

Energy requirements of a dairy cow double in the period immediately after calving117, 118. As a result, the demand for glucose increases above the supply (see Figure 1). Propionate is a key source of energy for dairy cows. More energy from propionate in the rumen increases production efficiency of cattle, providing dairy nutritionists and producers with options to increase herd profitability.

Rumen modifiers for dairy cows

Rumen modifiers are feed additives that alter one or more aspects of rumen fermentation of dairy cattle. Rumen modifiers for dairy cows can either change the digestibility of feed components, inhibit or stimulate specific microbial populations or enhance production of volatile fatty acids (VFA) in the rumen. VFA are a major source of energy for dairy cows.

Administration of Selko Renergy

Feed Selko Renergy at 30 grams/cow/day.

Reach out to your local Selko nutritionist for free expert advice

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Selko ® | sharing latest scientific insights

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Hydroxy trace minerals improve milk production, health & fertility

Several scientific trials have proven the effects of Selko Intellibond. Prof. Dr. Santos at the University of Florida has again shown great results of our Hydroxy Trace Mineral mixture for cows. Watch the videos from the latest webinar and discover how Hydroxy Trace Minerals like Selko Intellibond can increase colostrum production with 1.5 kg (3.3 lbs) per cow per day and 1.4 kg ECM (3 lbs) per cow per day throughout the first 105 lactation days.

Increase milk production or lower your feed cost with Selko Renergy

Selko Renergy can be used to increase feed efficiency of dairy cattle by increasing the amount of milk produced out of their diet. Alternatively, Selko Renergy can be used to increase production efficiency of dairy cattle by adding it to the dairy diet and replacing expensive dairy feed ingredients with cheaper alternatives.

Option 1: Add Selko Renergy on top of your diet to increase milk production

Add Selko Renergy on top of the existing diet to increase energy available for milk production. Add Selko Renergy to the diets for:

Fresh cows
High yielding groups of cows
Transition cows

Option 2: Reformulate your diet to lower feed costs

Feeding Selko Renergy allows you to reduce the amount of expensive, energy-dense ingredients in the diet and replace the space with lower-cost ingredients like forages. Replace costly, energy-dense ingredients in the diet such as:

Rumen available fats
Rumen by-pass fats
Starch sources like corn

Increase production of volatile fatty acids in the rumen with Selko Renergy

An in-vivo trial was carried out by the Colorado State University to measure the impact of Selko Renergy on the production of volatile fatty acids in the rumen of steers on a diet with high levels of grain119.

Material and methods

Two groups of 4 ruminally canulated steers each were fed a high concentrate diet. One group was fed Selko Renergy at the recommended dose, the other group served as a control group. After 28 days of feeding Selko Renergy, VFA profiles and lactic acid levels were compared between the group of cattle fed Selko Renergy and the controls.

Results

Adding Selko Renergy to the diet resulted in a significant increase of total VFA by 13.3% and propionic acid by 25.7%. L-Lactate production tended to be decreased by 25.1% (see Figure 3).

Figure 3: Total production of VFA, production of propionate and production of lactate in steers fed Selko Renergy compared to untreated controls receiving the same diet.

Increase milk production by feeding Selko Renergy to dairy cattle

Three performance trials in lactating dairy cows were carried out.

Trial in transition cows

A total of 72 dairy cows were included in this trial to assess the impact of feeding Selko Renergy during the close-up, prepartum, and transition period until 28 days in milk. The four groups were:

• Selko Renergy fed only prepartum

• Selko Renergy fed only postpartum

• Selko Renergy fed both pre and postpartum

• Control group without Selko Renergy

Production of energy corrected milk (ECM) was significantly improved by 5.34 kg (p = 0.05) per day in the group of animals fed Selko Renergy both pre and postpartum, 3.12 kg (p = 0.02) per day in the group fed Selko Renergy only postpartum and 2.2 kg (p = 0.10) per day in the group fed Selko Renergy only prepartum.

Figure 4: Production of 3.5% Fat Corrected Milk in early lactation cows or mid lactation cows fed Selko Renergy compared to control animals fed the same TMR without Selko Renergy.

Trials in early and mid-lactation cows

Two trials were carried out in early and mid-lactation cows. In the early lactation trial, 66 cows were included, half of them was fed Selko Renergy and compared to controls fed the same TMR, but without Selko Renergy. In the mid lactation trial, 28 cows were included. All cows included in the trial were fed the same TMR, half of them with, the other half without Selko Renergy. In both trials, the amount of Fat Corrected Milk was compared between the cows fed Selko Renergy and the controls (see Figure 4).

Download research and documentation

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

Releasing the power to drive production efficiency with Selko Renergy

Download product information for Selko Renergy™

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