降雨に伴う渓流水のＮＯ｀－´３‐Ｎ窒素安定同位体比の変動

• 木平 英一

  東京農工大学大学院連合農学研究科

• 楊 宗興

  東京農工大学農学部

• 八木 一行

  農業環境技術研究所 東京農工大学農学部

• 窪田 順平

  東京農工大学農学部

書誌事項

タイトル別名

• Variation in the Natural Abundance of 15N of NO-3-N in Streamwater During a Rainfall Event.
• コウウ ニ トモナウ ケイリュウスイ ノ NO3 N チッソ アンテイ ドウイタイヒ

抄録

The variation in N03--N concentration and the natural abundance of 15N (δ15N value) in streamwater was measured during a rainfall event. NO3--N concentration was positively correlated with discharge rate, but δ15N value was negatively correrated. The initial increase of N03--N concentration in streamwater was accompanied by a linear decrease of δ15N value from 0.2‰ to -1.4‰. Discharge of soil solution from surface soil layer explained this variation. When the NO3--N concentration decreased, δ15N value increased exponentially from -1.2‰ to 6.0‰. This variation could not be explained by the mixing of soil solutions, but it agreed with the classical equation of Rayleigh used to calculate the change in δ15N value during denitrification. We concluded that the decrease in NO3--N concentration in streamwater was caused by denitrification in the saturated soil layer during a rainfall event.

収録刊行物

• 水文・水資源学会誌

  水文・水資源学会誌 10 (4), 360-366, 1997

  水文・水資源学会

キーワード

• 渓流水, NO3--N,δ15N値,降雨イベント,脱窒

詳細情報

• CRID: 1390282679415795840
• NII論文ID: 130003663818
• NII論文ID: 10009850753
• NII書誌ID: AN10088049
• DOI: 10.3178/jjshwr.10.360
• ISSN: 13492853
• ISSN: 09151389
• ISSN: http://id.crossref.org/issn/09151389
• NDL書誌ID: 4257010
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4257010
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可