Jan 16, 2009

Influence of Cu2+, Cd2+ and cypermethrin on microbial functional diversity in different fertilization soils

Huan jing ke xue= Huanjing kexue
Wen-Jun XieHuo-Yan Wang

Abstract

Determination the bioavailability of contaminants in different fertilizer management soils can be of great theoretical significance for predicting and decreasing the effect of pollutants on eco-environment. In this study, three different fertilization soils were employed in a 16-year field experiment: no fertilization (CK), composted wheat straw and oil cakes (OM) and NPK fertilizer (NPK). The influences of Cu2+ (100 mg/kg), Cd2+ (5 mg/kg) and cypermethrin (l0 mg/kg) and their combinations on microbial functional diversity were observed in different fertilization soils. The results showed that the highest microbial functional diversity was observed in the NPK treatment, followed by CK, and the lowest in the OM soil. At 72 h incubation, AWCD (average well color development) of the NPK soil was 1.19 times than that of the CK soil and 1.62 times than that of the OM soil. After addition of contaminants into soils, microbial functional diversity decreased to a different extent. The greatest decrease extent was recorded in the NPK soil, followed by CK and the least in OM. Combination of Cd and cypermethrin had the biggest influence on the microbial functional diversity. AWCD was decreased by 48%, six substrate groups and microbial di...Continue Reading

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Mentioned in this Paper

Fertilizers
Pyrethroids
Fendona
Copper
Microbial
Biodiversity
Soil Pollutants
Fertilization
Environmental Monitoring
Soil Microbiology

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