Temporal change in N2O production process after crop-residue input by continuous measurements of N2O isotopomer ratios using quantum cascade laser spectrometry

Research Project

Project/Area Number	26892010
Research Category	Grant-in-Aid for Research Activity Start-up
Allocation Type	Single-year Grants
Research Field	Environmental agriculture(including landscape science)
Research Institution	Tokyo Gakugei University
Principal Investigator	YAMAMOTO AKINORI 東京学芸大学, 教育学部, 講師 (20733083)
Project Period (FY)	2014-08-29 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000) Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords	亜酸化窒素 / 作物残渣 / N2O同位体レーザー分光計
Outline of Final Research Achievements	Nitrous oxide (N2O) has 298 times of the global warming potential than carbon dioxide. Crop-residue is an important N2O source in agricultural ecosystems. We measured N2O isotopomer ratios (bulk N isotope ratios, and intramolecular 15N site preference) using a quantum cascade laser spectrometry system to estimate microbial N2O production process after crop-residue input. The N2O isotopomer ratios showed large fluctuation throughout the experiment. We found that predominant microbial process of N2O production changed after crop-residue input.

Report

(3 results)