TRACE MINERAL MANAGEMENT
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Manganese trace mineral source has an impact on rumen fermentation of dairy cattle

Key take aways from this article

  • Compared to other manganese trace minerals, Selko IntelliBond M and Selko Optimin Mn improved organic matter disappearance (aOMD) and apparent microbial biomass production (aMBP), two parameters for rumen fermentation.
  • It has been shown that improved rumen fermentation increases lactational performance of dairy cattle.

Fermetics trial with Selko IntelliBond M and Selko Optimin Mn

Dairy nutritionists are often concerned about under-supply of trace minerals. Both the level of supplementation as well as the source of trace minerals used in dairy cattle diets can have a significant impact on NDF digestibility. The source of trace minerals fed can have a negative impact on rumen fermentation and feed efficiency, which in term can impact lactational performance, health and fertility of dairy cattle.
According to Oba and Allen, if NDF digestibility increases by 1 point, dry matter intake might increase by 0.17 kg and milk production by 0.25 kg of 4% fat corrected milk[1]. A meta-analysis showed that feeding hydroxy trace minerals instead of sulphates improves improves NDF digestibility by 1.7% points[2].

Limited data are available on the effects of supplemental mineral sources on rumen fermentation of dairy cattle. The Fermentics model was used to test the effect of different manganese sources on apparent organic matter disappearance (aOMD) and apparent microbial biomass production (aMBP).[3,4]. Both aMBP and aOMD are correlated with milk production.

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Impact of manganese source on rumen fermentation, material and methods

Manganese trace minerals were added to containers containing a mix of 80% buffer and 20% cattle rumen fluid and bags containing TMR for cattle. The containers were incubated for 48-h in a 39.5°C water bath. Data were analysed using PROC MIXED (SAS institute Inc, Cary, NC). A p-value ≤ 0.05 was considered significant. The different manganese sources included in the trial were Selko IntelliBond M, Selko Optimin Mn, Mn oxide and Mn sulphate.The manganese trace minerals were compared to a control with no trace mineral source included.

Apparent Organic Matter Disappearance of Mn sources

Figure 1: Apparent Organic Matter Disappearance of Selko IntelliBond M and Selko Optimin Mn vs other manganese trace mineral products for dairy cattle.

Figure 2: Apparent Microbial Biomass Production of Selko IntelliBond M and Selko Optimin Mn vs other manganese trace mineral products for dairy cattle.

Impact of manganese source on rumen fermentation, results

Mn oxide and Mn sulphate reduced aOMD relative to the control (P<0.001), whereas Selko IntelliBond M and Selko Optimin Mn were similar to the control (see Figure 1). Selko IntelliBond M and Selko Optimin Mn had higher apparent microbial biomass production (aMBP) than the control, Mn sulphate and Mn oxide treatments (P<0.01, see Figure 2).

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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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Conclusion

Compared to the control without a manganese source, apparent Microbial Biomass Production (aMBP) was increased by Selko IntelliBond M and Selko Optimin Mn, suggesting a positive impact of manganese supplementation on rumen fermentation of dairy cattle. Compared to control, Selko IntelliBond M and Selko Optimin Mn did however not increase apparent Organic atter Dissapearance (aOMD). Compared to Mn sulphate and Mn oxide, both for Selko Optimin Mn and Selko IntelliBond M, aMBP and a OMD were increased, suggesting that the source of manganese supplementation for dairy cattle can have a significant impact on rumen fermentation.

References about the impact of manganese source on rumen fermentation of dairy cattle

  1. Oba, M. and M.S. Allen (1999). Evaluation of the Importance of the Digestibility of Neutral Detergent Fiber from Forage: Effects on Dry Matter Intake and Milk Yield of Dairy Cows. J. Dairy Sci., 99:589-596.
  2. Ibraheem, M, Kvidera, S. and B. Bradford (2021). Meta-analysis to determine the impact of trace mineral source on nutrient digestibility in dairy and beef animals. J. Dairy Sci. 104:97.
  3. Peterson, C., G. Boerboom, M. McCarthy, J. Heldt, K. Griswold, and J. Johnston. 2023. Effects of zinc and manganese source on 48-hour in vitro fermentation. J. Dairy Sci. 106 (Suppl. 1):455-456.
  4. Boerboom, G.M, Peterson, C.B, McCarthy, M.M, Heldt, J.S, and J. Johnston (2023). Effect of mineral source on 48-h in vitro fermentation. Proceedings of the 74th EAAP Congress, Lyon, page 710.

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