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Effect of heavy metals on soil microbial activities during two seasons

Research Paper | February 1, 2018

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Muhammad Nawaz, Rumsha Hassan, Muhamamd Dawood, Sheikh Saeed Ahmad, Aziz-ur-Rehman, Saeed Ahmad Malik,Yusraw Jawad, Salma Shahzad, Rubina Gishkori

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Int. J. Biosci.12( 2), 90-97, February 2018

DOI: http://dx.doi.org/10.12692/ijb/12.2.90-97


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Microbes are the important components of soil fertility but their efficiency is reduced due to the entry of heavy metals in the soil through different sources. The present work was conducted to examine the effect of three heavy metals (Zn, Cu, Cd) on the microbial parameters like microbial biomass, soil respiration and metabolic quotient during the season of spring and winter. Experiment was conducted in the pots by the addition of salts of Zn, Cu, Cd with three concentration i.e., conc. 1; 100, 200, 300, conc. 2; 5, 15, 25 and conc. 3; 0.12, 0.24 & 0.36 mg /kg in the soil respectively with respect to the control. Results regarding microbial biomass were significant in all three metals during spring and winter at (P<0.001) while in case of soil respiration only Cd showed significance effect in both seasons. Metabolic quotient expressed significance at (P<0.001) in case of Cu + Cd during spring and with Zn + Cd at (P<0.001) in winter. Overall results show that metals were in sequence of Cd>Cu>Zn in their effects and toxicity and spring was dominant in case of all metals.


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Effect of heavy metals on soil microbial activities during two seasons

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