Soil Microbes from Saline–Alkali Farmland Can Form Carbonate Precipitates

The formation of soil inorganic carbon in saline–alkali lands is great significance for enhancing sequestration. As the mechanisms, addition to discovered abiotic microbial mechanisms remain unclear. To address this, microbes were isolated from farmland Yellow River Delta north China. Then, their capacity carbonate precipitation was determined. Ten strains obtained soil. Of these, seven (four bacterial and three fungal strains), belonging Rhodococcus sp., Pseudomonas Bacillus Streptomyces Aspergillus Cladosporium Trichoderma formed precipitates range 89.77~383.37 mg. Moreover, related specific metabolisms by which can raise pH (from 7.20 >8.00), suggesting that enhance values containing function formation. Although an situ experiment needed confirm such capacity, these results showed bacteria fungi existing form precipitates. present study provided a perspective mechanism formation, further implying potential sequestration farmlands.