Effect of soil disinfection with 1,3-dichloropropene, chloropicrin and solarization on cellulose-decomposing ability and nitrifying bacteria

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  • Wada Satoko
    Graduate School of Bio-Application and Systems Engineering, Tokyo University of Agric. and Technol.
  • Fujino Chie
    Graduate School of Bio-Application and Systems Engineering, Tokyo University of Agric. and Technol.:(Present office)Graduate School of Agriculture, Hokkaido University
  • Toyota Koki
    Graduate School of Bio-Application and Systems Engineering, Tokyo University of Agric. and Technol.
  • Okamoto Tamotsu
    Miura Peninsula Region Office of Kanagawa Agricultural Technology Center

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Other Title
  • 1,3-ジクロロプロペン,クロルピクリン及び太陽熱による土壌消毒がセルロース分解能及び硝化菌に及ぼす影響
  • 1 3 ジクロロプロペン クロルピクリン オヨビ タイヨウネツ ニ ヨル ドジョウ ショウドク ガ セルロース ブンカイノウ オヨビ ショウカキン ニ オヨボス エイキョウ

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Abstract

Field experiments conducted during the period of 2003 to 2005 to evaluate the effect of soil disinfection on the soil microbial function. Organic matter decomposition activity after soil disinfection with 1,3-dichloropropene (1,3-D), chloropicrin (CP) and solarization was evaluated by measuring the cellulose- and glucose-decomposing activities. In 2003, a Haplic Andosol field (HA-soil) was used. Glucose decomposition activity was inhibited immediately after disinfection, and recovered to the level observed in a non-disinfected control soil. In 2004, a Low Humic Andosol (LA-soil) and the HA - soil were used. Although the cellulose decomposition activity (CDA) was suppressed immediately after disinfection, the activity in the HA-soil recovered within 10-12 weeks and the microbial community structure (determined by 16S rDNA-PCR-DGGE) also recovered within 17 weeks after disinfection. Although CDA recovered earlier in the LA-soil than in the HA-soil, it was temporarily suppressed again. In 2005, the effect of soil disinfection on CDA was evaluated using the LA-soil amended and not amended with compost immediately after disinfection. The activity was suppressed by soil disinfection and recovered readily during the growth period, irrespective of compost amendment. The number of ammonia-oxidizing bacteria decreased after disinfection and recovered within 2 to 4weeks in all the treatments in 2003 and 2004. We concluded that the disturbance of organic matter decomposition and nitrification associated with soil disinfection may be temporary and that the soil microbial function recovered significantly during the cropping season.

Journal

  • Soil Microorganisms

    Soil Microorganisms 62 (1), 21-31, 2008

    Japanese Society of Soil Microbiology

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