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Changes in Enzyme Activities and Microbial Community Structure in Heavy Metal‐Contaminated Soil under in Situ Aided Phytostabilization
The effect of lignite and lime on the structural biodiversity and enzyme activities of soil microorganisms in heavy metal‐contaminated soil during an aided phytostabilization was studied. Over the experiment the amount of bioavailable fractions of Zn and Cd declined threefold and in the end reached the values of 87.8 and 4.2 mg kg−1 for Zn and Cd, respectively. The activities of enzymes increased markedly in soil under aided phytostabilization. On the last sampling day the activities of dehydrogenase, alkaline and acid phosphatase, as well urease, were 15‐, 8‐, 4‐, and 19‐fold higher as compared to the initial values. The analyses of fatty acid methyl ester and phospholipid fatty acid (PLFA) patterns showed a shift in the structure of microbial populations in the treated soil as compared to untreated soil. In general, the microbial biomass of total, Gram‐positive and Gram‐negative bacteria (GNBB), as well actinomycetes and fungi (FB), was higher in the soil under aided phytostabilization in comparison with control soil. The highest biomass increase from 2.3 to 2.9 and from 0.4 to 0.8 nmol PLFA g−1 soil (dry weight), was found for GNBB and FB, respectively. Phytostabilization supported by lignite and lime appeared to be an effective method to decrease Zn and Cd content in heavy metal‐contaminated soil.
Changes in Enzyme Activities and Microbial Community Structure in Heavy Metal‐Contaminated Soil under in Situ Aided Phytostabilization
The effect of lignite and lime on the structural biodiversity and enzyme activities of soil microorganisms in heavy metal‐contaminated soil during an aided phytostabilization was studied. Over the experiment the amount of bioavailable fractions of Zn and Cd declined threefold and in the end reached the values of 87.8 and 4.2 mg kg−1 for Zn and Cd, respectively. The activities of enzymes increased markedly in soil under aided phytostabilization. On the last sampling day the activities of dehydrogenase, alkaline and acid phosphatase, as well urease, were 15‐, 8‐, 4‐, and 19‐fold higher as compared to the initial values. The analyses of fatty acid methyl ester and phospholipid fatty acid (PLFA) patterns showed a shift in the structure of microbial populations in the treated soil as compared to untreated soil. In general, the microbial biomass of total, Gram‐positive and Gram‐negative bacteria (GNBB), as well actinomycetes and fungi (FB), was higher in the soil under aided phytostabilization in comparison with control soil. The highest biomass increase from 2.3 to 2.9 and from 0.4 to 0.8 nmol PLFA g−1 soil (dry weight), was found for GNBB and FB, respectively. Phytostabilization supported by lignite and lime appeared to be an effective method to decrease Zn and Cd content in heavy metal‐contaminated soil.
Changes in Enzyme Activities and Microbial Community Structure in Heavy Metal‐Contaminated Soil under in Situ Aided Phytostabilization
Wasilkowski, Daniel (author) / Mrozik, Agnieszka (author) / Piotrowska‐Seget, Zofia (author) / Krzyżak, Jacek (author) / Pogrzeba, Marta (author) / Płaza, Grażyna (author)
CLEAN – Soil, Air, Water ; 42 ; 1618-1625
2014-11-01
8 pages
Article (Journal)
Electronic Resource
English