Estimation of carbon and nitrogen content in surface horizon using “Soil Information Web Viewer”

DOI JASI Web Site

Bibliographic Information

Other Title
  • 土壌情報閲覧システムを活用したわが国の農耕地作土層中の炭素・窒素賦存量の試算
  • ドジョウ ジョウホウ エツラン システム オ カツヨウ シタ ワガクニ ノ ノウコウチ サクドソウ チュウ ノ タンソ ・ チッソフゾンリョウ ノ シサン

Search this article

Abstract

The digital cultivated soil map and the Ba-sic Soil - Environmental Monitoring database are one of the most important soil information in Japanese ag-ricultural land. These soil information can be browsed on “Soil Information Web Viewer” which is provided by National Institute for Agro-Environmental Sciences. In this study, we estimated carbon and nitrogen con-tent of soil surface （0 － 14cm） in Japanese agricultur-al land using these soil inventories, and we also evalu-ated spatio-temporal variation of soil carbon and nitrogen content during 1979‒1998. Organic soil groups and Andosol groups showed high carbon and nitrogen content （Mg ha‒1） in surface horizon. And, the tempo-ral variation of soil carbon content was maintained constant in paddy fields, and it increased in orchard and grass land. On the contrary, soil carbon content in upland fields was decreased. And, soil nitrogen content in all land use type was gradually increased, and soil carbon and nitrogen ratio was tended to decrease in all land use type. Total soil carbon and nitrogen stock of surface horizon in Japanese agricultural land had peaked at 235 Tg C and 19.0 Tg N during 1984‒1988, and these had decreased to 218 Tg C and 18.4 Tg N during 1994‒1998. The spatio-temporal variation of soil carbon and nitrogen stock did not coincide with the fl uctuation of agricultural land area.

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top