Abstract
Effects of two concentrations (200 and 2000μg g−1 soil) of two heavy metals (copper and zinc as sulphates) applied to clay or sandy soil for 12 weeks on the total counts of fungi, bateria and actinomycetes were studied. Activities of three soil enzymes (urease, nitrate reductase and amidase) were also investigated. Application of heavy metals to the clay soil reduced the microbial populations. However, although neither heavy metal showed any significant increasing effect on microorganisms populations in clay soil samples, some stimulatory effects were noted in sandy soil. Activities of urease and nitrate reductase were inhibited by heavy metal application in both soils. Amidase activity was inhibited only with the higher application rate after some experimental periods.
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Hemida, S.K., Omar, S.A. & Abdel-Mallek, A.Y. Microbial populations and enzyme activity in soil treated with heavy metals. Water Air Soil Pollut 95, 13–22 (1997). https://doi.org/10.1007/BF02406152
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DOI: https://doi.org/10.1007/BF02406152