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Research Journal of Soil Biology
  Year: 2009 | Volume: 1 | Issue: 1 | Page No.: 8-14
DOI: 10.3923/rjsb.2009.8.14
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Pedogenetic Activities of Soil Microbes as Influenced by Trivalent Cationic Chromium

E.U. Onweremadu and M.I. Nwufo

We investigated the effects of different levels of chromium (111) (0, 10, 50, 100, 250, 500 and 1000 mg Cr kg-1 d.w.) on selected soil microbial parameters, such as total and active fungal mycelia, total microbial biomass carbon (Cmic) and soil potential activity (respiration) on an Isohyperthermic Arenic Kandiudult of Otamiri River floodplain, southeastern Nigeria. Field sampling was conducted in 2006 and collected soil samples were put in plastic containers before application of 7 treatments of Cr (111) as indicated. Soil samples were kept under laboratory conditions (water holding capacity = 30%; temperature = 25°C). Treatments were arranged using Completely Randomized Design (CRD) with 5 replicates. Routine and special analyses were conducted on investigated parameters. Results indicated significant (p<0.001) reduction in active and total fungal mycelia caused by additions of Cr (111) to the soil. A significant decrease (p<0.01) in Cmic was detected only in soils with 1000 mg Cr kg-1 d.w. Soil microbial activity declined to 17.07% in contaminated soils when compared with soils for control experiments. There were good relationships between soil microbial respiration and active fungal mycelium, suggesting their use in soil quality predictions.
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How to cite this article:

E.U. Onweremadu and M.I. Nwufo, 2009. Pedogenetic Activities of Soil Microbes as Influenced by Trivalent Cationic Chromium. Research Journal of Soil Biology, 1: 8-14.

DOI: 10.3923/rjsb.2009.8.14






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