集約的畜産地帯における大気中アンモニア濃度の実態 The Status of Atmospheric Concentrations of Ammonia in an Intensive Dairy Farming Area in Central Japan

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比較的簡便なパッシブ法を用い、関東北部の集約的畜産地帯とその周辺部において大気中アンモニア濃度を13月間観測した。その結果、観測期間の平均値は畜産地帯中央部で3.2-36.2μgNm-3、遠隔山林地帯で0.2-0.4μgNm-3と、畜産地帯中央部で高く周辺部で低い明瞭な地点間差と、4-5月をピークとする季節変動が認められた。平均アンモニア濃度と畜産農家のふん尿施設からの距離は負の相関関係を示し、lkm以内では畜産農家を起源とするアンモニアが大気中濃度の決定要因と考えられた。この平均大気濃度はこの間の雨水の窒素濃度に対応していたことから、畜産を起源とするアンモニアが窒素沈着量に反映したと考えられた。季節変動の要因として降雨パターンとともに畜産農家のふん尿処理・利用の作業が想定できた。

Atmospheric concentrations of ammonia were monitored for one year in an intensive dairy farming area and its environs in the Kanto region in central Japan. Passive samplers were used to collect gaseous ammonia in the atmosphere. A clear difference in concentrations was observed ; they were high in the central farming area (3.2-36.2μg Nm^<-3>) and low in its surrounding area (0.2-0.4μg Nm^<-3>). Seasonal changes in concentrations were also witnessed ; concentration reached a peak in April and May. A negative correlation was found between the annual mean of ammonia concentrations and the distance from the manure facilities of dairy farmers. Ammonia volatilization from manure was considered to be the primary factor that controlled the atmospheric concentrations of ammonia within 1 km of the manure facilities. The annual mean concentrations of ammonia positively correlated with the nitrogen concentrations in open-bulk precipitation. It was, therefore, suggested that ammonia emissions from dairy farming affected the wet deposition of nitrogen. On the other hand, both seasonal changes in precipitation and manure management performed by dairy farmers were considered to be the primary factors that induced seasonal changes in atmospheric ammonia concentrations.

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 77(1), 53-57, 2006-02-05

    日本土壌肥料學會

参考文献:  11件中 1-11件 を表示

被引用文献:  6件中 1-6件 を表示

各種コード

  • NII論文ID(NAID)
    110006280011
  • 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
    7826496
  • 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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