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Microbial activity of Cu contaminated soils and effect of lime and compost on soil resiliency

In vineyards, the long-term use of copper fungicides has increased soil Cu concentrations that can adversely affect the number and activities of soil microorganisms. To better understand this phenomenon and to ameliorate such harmful effects, an incubation experiment was carried out with a sandy loam and a sandy soil to which increasing rates of CuS04 were added. By this treatment, the basal soil respiration (755%) and decomposition of added vine branches (46-86%) was inhibited. At the application rate of 500 mg Cu kg-1, soil microbial biomass-C was inhibited (7-66%) in the sandy soil and stimulated (2-10%) in the sandy loam soil. The specific respiration rate was a reliable indicator for ...

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