摘要
Coal mining adversely affects soil quality around opencast mines. Therefore, a study was conducted in 2010 and 2011 to assess seasonal and site-specific variations in physical, chemical, and biological properties of soil collected at different distances from mining areas in the Jharia coalfield, India. Throughout the year, the soil in sites near coal mines had a significantly higher bulk density, temperature, elec trical conductivity, and sulfate and heavy metal contents and a significantly lower water-holding capacity, porosity, moisture content, pH, and total nitrogen and available phosphorus contents, compared with the soil collected far from the mines. However, biological properties were site-specific and seasonal. Soil microbial biomass carbon (MBC) and nitrogen (MBN), MBC/MBN, and soil respiration were the highest during the rainy season and the lowest in summer, with the minimum values in the soil near coal mines. A soil quality index revealed a significant effect of heavy metal content on soil biological properties in the coal mining areas.
Coal mining adversely affects soil quality around opencast mines.Therefore,a study was conducted in 2010 and 2011 to assess seasonal and site-specific variations in physical,chemical,and biological properties of soil collected at different distances from mining areas in the Jharia coalfield,India.Throughout the year,the soil in sites near coal mines had a significantly higher bulk density,temperature,electrical conductivity,and sulfate and heavy metal contents and a significantly lower water-holding capacity,porosity,moisture content,pH,and total nitrogen and available phosphorus contents,compared with the soil collected far from the mines.However,biological properties were site-specific and seasonal.Soil microbial biomass carbon(MBC)and nitrogen(MBN),MBC/MBN,and soil respiration were the highest during the rainy season and the lowest in summer,with the minimum values in the soil near coal mines.A soil quality index revealed a significant effect of heavy metal content on soil biological properties in the coal mining areas.
基金
the Ministry of Coal, Government of India and the University Grant Commission, New Delhi, India for financial assistance
