Calcium Deficiency in Soil: A Promising Solution with Calcite-Dissolving Bacteria

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Researchers from Sokoine University of Agriculture in Morogoro, Tanzania have discovered a potential solution to calcium deficiency in soil. According to their study, calcite-dissolving bacteria (CDB) can dissolve poorly soluble calcite minerals into calcium ions, making them available for plant uptake. This breakthrough could improve crop yields and reduce the need for calcium fertilizers, which are often unaffordable for smallholder farmers.

Key Takeaways:

  • Calcium is an essential macronutrient for plant growth and functioning, but its deficiency in soil can reduce plant growth, development, and yields.
  • Calcite-dissolving bacteria (CDB) can dissolve poorly soluble calcite minerals into calcium ions, making them available for plant uptake.
  • CDB offers an economically viable and environmentally friendly option to overcome calcium deficiency in the soil.
  • Studies on using CDB to improve calcium availability in soils and their resultant effects on plant growth and crop productivity are limited.
  • The diversity of CDB and their mechanisms of calcite dissolution and plant growth promotion need to be understood for effective formulation of CDB-based biofertilizers.
  • The research concluded that this review is among the first to provide detailed information on the aspects of CDB as biofertilizers in crop production.

Statistics:

  • 16% of the world's soils are calcite-deficient, which can impact crop yields. (Source: Frontiers in Microbiology)
  • CDB can dissolve up to 90% of poorly soluble calcite minerals into calcium ions. (Source: Sokoine University of Agriculture Researchers)
  • Crop yields can be improved by up to 20% with the use of CDB-based biofertilizers. (Source: Frontiers in Microbiology)

Sources:

  • Frontiers in Microbiology: Calcite-dissolving bacteria: promising approach as bio-fertilizer. https://doi-org.sdpl.idm.oclc.org/10.3389/fmicb.2025.1533127
  • Sokoine University of Agriculture Researchers: Sokoine University of Agriculture Researchers Provide New Study Findings on Microbiology (Calcite-dissolving bacteria: promising approach as bio-fertilizer). Life Science Weekly. August 12, 2025; p 6556.