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No. B-51.2.8 CH₄ and N₂O Emissions Control from Grassland and Animal Waste Management

Contact Person

Takeshi Shibuya Researcher
Department of Environment, National Grassland Research Institute,
Ministry of Agriculture, Forestry & Fisheries.
768 Senbonmatsu, Nishinasuno, Tochigi, 329-2793 Japan
Phone +81-287-36-0111(Ext.7558), FAX +81-287-36-6629
E-mail : mirage@ngri.affrc.go.jp

Total Budget for FY1998

4,381,000 Yen

Abstract

So far, we measured methane(CH₄) and nitrous oxide(N₂O) fluxes at the grassland in 91, 95, 96, 97, in 98. Moreover, it measured CH₄ and N₂O fluxes at the slurry applications with several times. Based on these data, we made the emission factor index for CH₄ and N₂O from grassland and animal waste. This emission factor index is the revise of the index which was made in 94(B-2.4.2 Emission of Trace Gases Contributing Greenhouse Effect from Grassland by GERF). Besides, we made the emission factor indexes of slurry application methods and nitrogen fertilizers.
We have proposing the management that N₂O emission could be effectively reduced by the change in the kind with nitrogen fertilizer(B-16.3 Studies of Control and Activities of Greenhouse Trace Gases in Grassland by GERF). As for the way of the fertilization management, it computed a cost. As a result, the effective way of the fertilization management to reduce N₂O emission had increased a fertilizer charge by 17-51% compared with the conventional management. The highest cost way of the fertilization management was the way of the fertilization management to have used CDU.

[Key Words]

Grassland Nitrous oxide, Methane Animal waste Nitrogen fertilizer