Ruminal Solubility and Bioavailability of Inorganic Trace Mineral Sources and Effects on Fermentation Activity Measured in Vitro

Antal Vigh (), Adriana Criste, Kévin Gragnic, Léa Moquet and Christine Gerard
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Antal Vigh: Faculty of Animal Sciences and Biotechnology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania
Adriana Criste: Faculty of Animal Sciences and Biotechnology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania
Kévin Gragnic: ADM Animal Nutrition, Talhouët, 56250 Saint-Nolff, France
Léa Moquet: ADM Animal Nutrition, Talhouët, 56250 Saint-Nolff, France
Christine Gerard: ADM Animal Nutrition, Talhouët, 56250 Saint-Nolff, France

Agriculture, 2023, vol. 13, issue 4, 1-18

Abstract: The aim of this study was to assess the effects of supplementation with inorganic sources of manganese (MnO, MnSO 4 ), zinc (ZnO, ZnSO 4 ) and copper (CuSO 4 ) at different levels (0.06%DM for Mn, 0.05%DM for Zn; 0.01 and 0.05%DM for Cu) on in vitro rumen fermentation, solubility and bioavailability. Fermentation activity was measured by total gas production (TGP) and dry matter degradability after 70 h of fermentation (dDM%). Trace mineral (TM) solubility was estimated via the TM concentration in the supernatant of the final fermentation medium (SOL) and TM bioavailability from the TM concentration in a bacterial-enriched fraction (BACT). Mn (regardless of source) and ZnO tended ( p < 0.10) to decrease, while Cu showed no significant effect on TGP. The addition of inorganic Mn and of ZnO tended ( p < 0.10) to decrease, ZnSO 4 tended to increase ( p < 0.10), whilst Cu showed no effect on dDM%. Concerning solubility, Mn (MnO and MnSO 4 ), ZnSO 4 and CuSO 4 significantly ( p < 0.05, p < 0.001 and p < 0.01) increased, while ZnO did not affect TM content in the SOL. These results indicate that MnSO 4 , ZnSO 4 and CuSO 4 are highly soluble, MnO is quite soluble, while ZnO has a low solubility in the rumen. Based on the TM content in BACT, MnO, MnS 4 and CuSO 4 have high bioavailability, while ZnO is poorly assimilated by rumen bacteria. However, the lack of clear inhibition or improvement in fermentations suggests that the rumen microbiota have a low requirement for TM supplementation.

Keywords: ruminant; fermentation; solubility; trace minerals (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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