Effect of Marine Microorganisms on Limestone as an Approach for Calcareous Soil

Abstract

Calcareous soils generally have low levels of organic matter and nitrogen; they require modification to promote their support for agriculture production. Calcareous soils are commonly found in important agricultural areas throughout the world, mainly around the Mediterranean, America and Australia. In this study, we the isolated and identified different groups of microorganisms, from a product made from seaweed, in relation to their soil improvement properties. The objective was to use these microorganisms for the solubilization of specific soil elements and reduce their accumulation as a result of overfertilization. The isolated microorganisms were grown in specific culture media and were applied on limestone to determine their effect on mobility of Ca, Mg and K. Also, changes in soil properties such as pH, texture and density were evaluated. This study demonstrated that the treatments applied were able to modify the solubility of Ca, Mg and K, increasing it, in some cases, up to 3500%. In addition, an increase of organic matter close to 200% was observed. Both the group of molds and yeasts, and the group of nitrogen-fixing microorganisms, modified the proportion of sand, silt and clay in the treated limestone. These results open possibilities for the widespread use of marine microorganisms on a large scale in the agricultural sector, since they improve the nutrient availability present in the soil.

Active permanent greening – a new slope greening technology based on mineral solubilizing microorganisms

“…At present, mineral solubilizing microorganisms have many applications in heavy metal remediation( Mishra et al., 2017 ; Yin et al., 2019 ; Fakhar et al., 2020 ) and microbial metallurgy( Behera and Mulaba-Bafubiandi, 2016 ; Ilyas et al., 2018 ; Priya and Hait, 2020 ), but there is little research in slope engineering management. In this study, MSMs could significantly increase the effective calcium, magnesium, and potassium ion contents of the soil, which is consistent with previous findings ( Villarreal Sanchez et al., 2018 ; Soumare et al., 2022 ). Strategy A showed the highest performance among the different strategies.…”

Effect of applying bio-enriched rock phosphate on soil properties and wheat plant growth

“…The negative effect of microorganisms under this study on the soil CaCO 3 content is attributed mainly to microbial activity, producing CO 2 and organic acids that react and dissolve the calcium carbonate of the soil. These results agree with those reported by Abo-baker (2017), Adnan et al (2017), Sanchez et al (2018) and Farrag and Bakr (2021).…”

“…Also, Olsen extractable P content progressively decreased after 2 days of incubation in this treatment, where the lowest value for extractable phosphorus 5091.66 mg kg -1 was recorded at (15 days incubation at 30 °C). Acid-producing bacteria (APB) such as Bacillus megathirum and Bacillus polymyxa, have the ability to convert the insoluble forms of P into soluble ones through the production of organic and inorganic acids, as well as CO 2 that react and dissolve the rock phosphate Therefore, APB play an important role in increasing the availability of P, these results agree with those reported by Abobaker (2017), Sanchez et al (2018) and Farrag and Bakr (2021).…”

Multi-Trait Wheat Rhizobacteria from Calcareous Soil with Biocontrol Activity Promote Plant Growth and Mitigate Salinity Stress

“…Calcareous soils are commonly found in important agricultural areas, mainly around the Mediterranean, America and Australia [ 62 ]. Calcareous soils are problematic, usually poor in organic matter and available nitrogen and they require modification to promote their support for agriculture production.…”