EPNの容器内土壌中における分解

DOI NDLデジタルコレクション 日本農学文献記事索引 Web Site Web Site
  • 若林 猛
    Biological and Chemical Research Laboratory, Nissan Chemical Industries, Ltd.
  • 五十嵐 丕
    Biological and Chemical Research Laboratory, Nissan Chemical Industries, Ltd.
  • 山本 出
    Department of Agricultural Chemistry, Tokyo University of Agriculture

書誌事項

タイトル別名
  • Degradation of EPN in Soils under Laboratory Conditions
  • EPNの容器内土壌中における分解〔英文〕
  • EPN ノ ヨウキナイ ドジョウチュウ ニ オケル ブンカイ エイブン

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抄録

The degradation of [phenyl-U-14C] EPN and [p-nitrophenyl-U-14C] EPN was studied in three soils under laboratory conditions. Persistence of EPN was influenced by soil type and moisture condition. Half-life at 1ppm dose level varied as follows: Upland conditions: about 30 days for Utsunomiya volcanic ash soil and about 90 days for Taketoyo diluvial soil. Submerged conditions: 7-15 days for Utsunomiya soil and 3-7 days for Konosu alluvial soil. In upland soils, identified degradation products were EPN-oxon, desethyl EPN-oxon, p-nitrophenol, O-ethyl S-methyl phenylphosphonothiolate, O-ethyl O-methyl phenylphosphonate, O-ethyl hydrogen phenylphosphonate and hydrogen phenylphosphonate. The latter two were found only when the soils were extracted after acid treatment, indicating their strong adsorption to soils. In submerged soils, all the degradation products from upland soils were found except desethyl EPN-oxon, and O-ethyl hydrogen phenylphosphonothioate and amino-EPN were also found. In a sterilized soil (submerged Utsunomiya soil), the degradation of EPN was almost suppressed, indicating the importance of microbial degradation. When incubated with Bacillus subtilis in a liquid medium, EPN was degraded rapidly and the degradation products formed were the same as those found in the submerged soils.

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