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Notice of Academic Report "Greenhouse gas research in agricultural fields"

Sourse: College of Natural Resources and Environment  Date:2017-04-28

Presentation title: Greenhouse gas research in agricultural fields

Presenter: Kosuke Noborio

Time: Tuesday, 430 pm, May 2, 2017

Venue: Conference hall 307, College of Natural Resources and Environment

Biograph of Kosuke Noborio:

Kosuke Noborio was born in July 16, 1955 in a mountainous small community in Ehime Prefecture, Japan. He was raised up there until graduating Ozu Highschool in 1974. He entered Ehime University and majored in Agricultural Engineering in 1974. He started working for an agricultural engineering consulting company just after graduation in 1981. He returned to a graduate school of Tottori University in 1985 and graduated in 1987. He continued to his education in Texas A&M University until he obtained a Ph.D. in Soil Science under the supervisions of Dr. Jim Heilman and Dr. Kevin McInnes in 1995. He worked as a postdoctoral research fellow for Dr. Gary Kachanoski in Guelph University, Canada until 1997. He moved to Iowa State University and worked as a postdoctoral research associate for Dr. Bob Horton until he found a permanent faculty position at Iwate University in Japan in 1998. He started greenhouse gas research in an agricultural field where cow manure was applied. He moved to Meiji University in 2005. Since then he has continued to conduct greenhouse gas research in lowland rice paddies. Dr. Noborio has published over 60 papers with high impact journals as Soil Science Society American Journal、Agriculture Ecosystems & Environment、Atmospheric Environment。


Agricultural fields are thought to be a major source of greenhouse gases whereas the ocean to be a major sink. We used a relaxed eddy accumulation (REA) technique along with the closed chamber method to measure greenhouse gas flux in the agricultural fields, including a grass field applied with cow manure and lowland rice paddies. In an Andisol grass field applied with cow manure, whose major constituent was NH4+, nitrification and denitrification processes simultaneously occurred and N2O gas was emitted. In a lowland rice paddy field, the REA measured average gas flux over a certain area of the field whereas the closed chamber covered on the water surface only measured gas diffused through the water surface and carried by bubbles. More bubbles were formed with increases in soil temperature and decreases in atmospheric pressure. Near the roots of rice plants in soil, CH4 was oxidized into CO2.

College of Natural Resources and Environment
April 28, 2017