Determination of nitrogen mineralization of forest soil under the field using the resin core method

• Hirai Keizo

  Shikoku Research Center, Forestry and Forest Products Research Institute Present office: Tohoku Research Center, Forestry and Forest Products Research Institute

• Morisada Kazuhito

  Shikoku Research Center, Forestry and Forest Products Research Institute Present office: Forestry and Forest Products Research Institute

Bibliographic Information

Other Title

• レジンコア法を適用した森林土壌における現地窒素無機化の定量

Abstract

We determined nitrogen mineralization in top soil under the field using the resin core method. We installed incubating columns which were made from soil and ion exchange resin cores into soil surface during one year in the field. Rate of mineralized nitrogen was calculated from nitrogen contents in soil and resin cores after incubation. Nitrogen contents in the soil collected after incubation were small and it was neglect for progress of nitrogen mineralization. Nitrogen content in the soil was lower than those of in the ion exchange resin. Those results suggest that measurement of nitrogen mineralization in the field was available using resin core method. Annual amounts of mineralized nitrogen in this study were 20.6 to 55.6 kgN ha^-1 yr^-1 and ratio of mineralized nitrogen to organic nitrogen was 1.4 to 5.2%. Estimated amounts of mineralized nitrogen from A₀ horizon and surface soil and the ratio of ammonium nitrogen to total inorganic nitrogen contents were higher in the soil at the ridge site than those of in the upper slope site. At the ridge site, it was also cleared that the ratio of nitrogen amounts supplied from A₀ horizon was higher than those of in the upper slope site.

Journal

• Tohoku Journal of Forest Science

  Tohoku Journal of Forest Science 12 (1), 12-20, 2007-03-31

  The Tohoku Society of Forest Science

Details

• CRID: 1390001204460179840
• NII Article ID: 110009607276
• DOI: 10.18982/tjfs.12.1_12
• ISSN: 24241385
• ISSN: 13421336
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed