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B-51.2.3 Studies on CH₄ and N₂O emission from tropical arable land, and fertilizer management

[Contact Person]

Takeshi Watanabe
Researcher
Environmental Resources Division
Japan International Research Center for Agricultural Sciences
Ministry of Agriculture, forestry and fishery
Ohwashi 1-2, Tsukuba, Ibaraki, 305 Japan
Tel:+81-298-38-6355 Fax:+81-298-38-6651
E-mail: watatake@jircas.afffrc.go.jp

Total Budget for FY1998

4,000,000Yen

Abstract

The final goal of the research project is to estimate the amount of N₂O emitted from the tropical cultivated soils and to develop mitigation alternatives. Before this project, another project which had same goal, had been carried out from FY 1995 to FY 1997. In addition to the results of the former project, we clarified N₂O emission from upland fields' soil in Thailand through a year.
As hopeful mitigation alternatives, the effects of a controlled availability fertilizer and a chemical nitrogen fertilizer amended with a nitrification inhibitor (AM: 2-amino-4-chloro-6-methyl pyrimidine) on mitigation of nitrous oxide emission from soil were surveyed by pot. Those fertilizers reduced N₂O emission compared with urea.

[Key Words]

Nitrous oxide, Greenhouse gas, Upland fields' soil, the Tropics, Mitigation alternatives