Effects of Pesticides on Soil Microflora -I. Effects of pesticides on Microflora, Soil Respiration and Enzyme Activity in Soil

농약(農藥)이 토양(土壤) 미생물상(微生物相)에 미치는 영향(影響)에 관(關)한 연구(硏究) -I. 살균(殺菌)·살충제(殺蟲劑)가 토양중(土壤中)의 미생물(微生物), 토양호흡(土壤呼吸) 및 효소활성(酵素活性)에 미치는 영향(影響)

  • Published : 1987.12.30


This study was carried out to investigate the effects of pesticides on soil respiration, microflora and enzymes in loam soil, and on pathogenic microorganisms in continuous pepper cropping soil. The results are summarized as follows. No significant effect of pesticides on soil respiration was shown, with the exception of propoxur which slightly increased at $10{\mu}g\;g^{-1}$ treatment. When pesticides were treated, the amount of soil microorganisms generally decreased at the early stage of incubation and the number of microflora was much more decreased at 60-day incubation. When pesticides were treated, the amount of soil enzyme activity was inhibited at the early stage of incubation and gradually recovered at the last stage of incubation. The amount of polygalacturonase activity was increased at the 20-and 30-day incubation in propoxur treatment plot. The amount of ${\beta}$-glucosidase and dehydrogenase activity was increased at 20-and 60-day incubation in carbofuran and acephate treatment plot. The amount of phosphatase activity was increased at 60-day incubation in propoxur and isoprocarb treatment plot. The amount of Fusarium generally decreased in continuous pepper cropping soil, with the exception of isoprocarb and acephate treatment plot which significantly increased. The amount of Pythium increased at 60-day incubation with the exception of captan treatment plot which significantly decreased.



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