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The impact of trace mineral management on rumen function of dairy cows

The EAAP congress will take place from September 5-9 in Porto. Professor Jerry W. Spears from the North Carolina State University, Department of Animal Science, will be one of the speakers. His invited lecture will focus on trace mineral requirements of ruminal microorganisms, and the effect of trace mineral source on ruminal fermentation.

Selko® | sharing latest scientific insights

Did you know?
TMR spoilage can already begin at temperatures of 21°C

In a trial at Kempenshof Ruminant Research Centre involving 120 dairy cows, Selko TMR proved to be effective in improving milk production during warm weather. While maintaining dry matter intake, cows on Selko TMR showed an increase in milk yield, particularly a 1.7 kg rise in the 5th week, and significantly higher milk solids.

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Selko® | sharing latest scientific insights

Selko TMR preserves TMR quality and elevates milk yield at the same time

A study revealed Selko TMR's role in TMR preservation, maintaining feed quality and enhancing milk output. By mitigating TMR spoilage and heating, it demonstrated a 0.9 kg/h/d milk production increase, highlighting its importance in feed management during cooler seasons.

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Trace mineral requirements of ruminal microorganisms of dairy cows

A number of trace minerals for dairy cows are required in low concentrations by ruminal microorganisms. With the exception of cobalt (Co), minimal dietary trace mineral requirements of the host ruminant appear to be considerably greater than that needed for rumen microbial requirements. It is well known that certain ruminal bacteria can synthesize vitamin B12 from inorganic Co. Some bacteria species require vitamin B12 as a growth factor, and adequate dietary Co is needed to allow sufficient ruminal B12 synthesis to meet their requirement. Vitamin B12 is needed as a cofactor for ruminal microorganisms to convert succinate to propionate. Dietary Co deficiency results in decreased ruminal propionate in ruminants fed high concentrate diets with low levels of fiber and decreased fiber digestion in ruminants fed high fiber diets with low levels of concentrate.

Selko® | sharing latest scientific insights

Check the quality of your TMR
with a free TMR pathogen screening

Protect cow health and milk production with a complementary TMR pathogen screening worth €100. Early detection of contamination maintains herd performance. Contact us to claim your analysis.

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Thank you for requesting your free pathogen screening.

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The impact of trace mineral nutrition on ruminal fermentation of dairy cows

Attempts have been made to use high concentrations of certain trace minerals to favorably manipulate ruminal fermentation. For example, attempts have been made to increase rumen protein bypass by feeding high dietary zinc (Zn) to cattle. However, studies have indicated that high concentrations of copper (Cu), Zn, and iron reduce cellulose digestion in vitro. Recent studies have indicated lower fiber digestibility in cattle supplemented with sulfate sources of Cu, Zn, and manganese compared with those fed similar concentrations from hydroxy or certain organic sources. Research has clearly indicated that hydroxy sources of Zn and Cu are metabolized differently in the rumen than sulfate sources and limited research suggests that trace mineral source may affect the rumen microbiome. Additional research is needed to elucidate the mechanism(s) whereby trace mineral sources affect fiber digestibility of dairy cows differently.

Selko | solutions based on science

Increase your milk production by improving fibre digestibility

Contact your local Selko IntelliBond representative for more information

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the Selko global marketing team

Find out more about dairy performance...