Abstract
Field measurements of CH4 emission from rice paddy field during cultivation periods were performed at all of 47 Japanese prefectures under the project of ‘Research for evaluation of CH4 and N2O emissions from agricultural land, and improvement methods of soil, water and fertilizer management’ conducted by Agricultural Production Bureau, the Ministry of Agriculture, Forestry and Fisheries. Although this project was carried out at 159 fields, the data of 132 fields were used for this report because other 27 fields had not enough data to be suitable for the statistics analyses.
The measurements at rice paddy fields in various locations in Japan showed that there were large temporal variations of CH4 flux and that the fluxes differed markedly with climate, characteristics of soil and paddy, application of organic matter and mineral fertilizer, and agricultural management practices.
These data mainly indicated that CH4 emission from Gley soils was greater than those from other soil types such as Andosols, Upland soils, fine-textured Lowland soils, medium and coarse-textured Lowlands soils and gravelly Lowland soils, and that water and organic matter managements influenced CH4 emission. It is suggested that midsummer drainage treatment suppressed while the application of fresh organic matter such as rice straw and wheat straw enhanced CH4 emission, respectively.
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Kanno, T., Miura, Y., Tsuruta, H. et al. Methane emission from rice paddy fields in all of Japanese prefecture. Nutrient Cycling in Agroecosystems 49, 147–151 (1997). https://doi.org/10.1023/A:1009778517545
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DOI: https://doi.org/10.1023/A:1009778517545