Study on interaction between nitrogen cycle and nitrogen input/output in forested ecosystem.

2015 Fiscal Year Final Research Report

• Project/Area Number: 25850114
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: The University of Shiga Prefecture
• Principal Investigator: Osaka Ken'ichi 滋賀県立大学, 環境科学部, 助教 (30455266)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 森林 / 窒素 / 水文過程 / 安定同位体比 / 硝酸イオン / 降雨調査

Outline of Final Research Achievements

To determine the availability of atmospheric nitrate deposition on forested ecosystem we quantitatively evaluated the atmospheric nitrate passing through forest watersheds by measuring oxygen isotope of nitrate leaching at the rainfall events. 2.9-37.8% (average = 15.5%) of atmospheric nitrate deposition passed through the watershed, and that account for 3.1 to 49.8% (average = 26.4%) of nitrate leaching during rainfall events. This suggests the possibility that the nitrate leaching will increase immediately in the forested watershed when the amount of nitrate deposition increases.

Free Research Field

森林水文学