暗きょ排水組織を敷設した海岸砂地畑における窒素容脱量の推定 Estimation of Nitrogen Leaching Rates in a Vegetable Field with a Subsurface Drainage System in a Coastal Sand Dune Area

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Nitrogen leaching rates were estimated in a vegetable field with a subsurface drainage system in a coastal sand dune area of Shizuoka, Japan, in two different years (1992 and 1994). Nitrate was the major form of nitrogen leached out from the field. Nitrate concentration in the drainage water was high from fall to spring, with the maximum values exceeding 20 mg N L^<-1>. Removal of plastic film covering carrot fields in March might cause the leaching of nitrogen that accumulated in the soil during the carrot growing season during winter. The amount of discharge calculated from working duration of the lifting pumps corresponded well with the amount of percolation separately calculated from precipitation and evapotranspiration. The estimated nitrogen leaching rates showed two seasonal increases in spring and fall, reflecting increases in precipitation and nitrogen concentration in the drainage water. Annual nitrogen leaching rates ranged from 95 to 143 kg N ha^<-1> y^<-1>, which were 26 to 41% of the amount of chemical fertilizer applied. The precipitation in 1994 was extraordinarily low, which resulted in small amount of percolation and a low nitrogen leaching rate. Precipitation greatly affects nitrogen leaching in coastal sand dune areas.

収録刊行物

  • 日本土壌肥料學雜誌 = Journal of the science of soil and manure, Japan

    日本土壌肥料學雜誌 = Journal of the science of soil and manure, Japan 71(4), 512-519, 2000-08-05

    日本土壌肥料學會

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各種コード

  • NII論文ID(NAID)
    110001747012
  • NII書誌ID(NCID)
    AN00195767
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00290610
  • NDL 記事登録ID
    5489225
  • NDL 雑誌分類
    ZR7(科学技術--農林水産--農産)
  • NDL 請求記号
    Z18-331
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  IR 
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