alexa Abstract | ASSESSING CHANGES IN SOIL MICROBIAL POPULATION WITH SOME SOIL PHYSICAL AND CHEMICAL PROPERTIES


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Abstract

Soil is a dynamic system in which continues interaction takes place between soil minerals, organic matter and living organisms that influences the soil physico-chemical and biological properties. In present investigation soil microbial community (bacteria and fungi) and soil chemical properties and their relation with soil texture has been addressed. Soil samples with a range of texture were collected from nine sites. Soil chemical characteristics (e.g., pH, organic matter (OM), total soil nitrogen (TN) that might influence microbial population were quantified for each site. The finding demonstrate that bacterial population was significantly affected by particle size, yielding higher bacterial population in finer soil texture, furthermore bacterial population strongly correlated with clay concentration (r = 0.90), pH(r = -0.85), OM (r=0.80), SOC (r = 0.79), TN (r= 0.81) and C:N ratio (r=-0.92). Fungal propagules did not show any significant differences in any soil texture with respect to sites. Soil texture significantly (p<0.05) affected pH, organic matter, organic carbon, water contents, total nitrogen and C:N ratio; and they were strongly correlated with clay concentration. Increasing bacterial population in finer soil likely due to protective microhabitat, the increased rate of organic matter and total nitrogen in finer texture, suggesting that the vicinity between microbes, organic matter, and clay is required for the survival and activity of microbes, in which organic matter and clay particles provide microhabitat, substrates and nutrients.

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Author(s): Anwar O. Mohammad

Keywords

Soil texture, Microbial communities, Organic matter, Soil characteristics, Plant Sciences, Environmental sciences

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