Effects of Plant Species on CH_4 and N_2O Fluxes from a Volcanic Grassland Soil in Nasu, Japan(Environment)

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概要

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• To investigate the effects of plant species in grassland on methane (CH_4) and nitrous oxide (N_2O) fluxes from soil, fluxes from an orchardgrass (Dactylis glomerata L.) grassland, white clover (Trifolium repens L.) grassland and orchardgrass/white clover mixed grassland were measured weekly from April 2001 to March 2002 using a vented closed chamber method. Related environmental parameters (soil inorganic N content, soil pH (H_2O) value, soil moisture content, soil temperature, grass yield, and the number of soil microorganisms) were also regularly monitored. On an annual basis, CH_4 consumption in the soil of the orchardgrass grassland, white clover grassland and orchardgrass/white clover mixed grassland was 1.8, 2.4, and 1.8 kg C ha^<-1> year<-1>, respectively. The soil bulk density of the white clover grassland was lower than that of the other grasslands. Fluxes of CH_4 were positively correlated with the soil moisture content. White clover increased the CH_4 consumption by improving soil aeration. Nitrogen supply to the soil by white clover did not decrease the CH_4 consumption in the soil of our grasslands. On the other hand, annual N_2O emissions from the orchardgrass grassland, white clover grassland, and orchardgrass/white clover mixed grassland were 0.39, 1.59, and 0.67 kg N ha^<-1> year^<-1>, respectively. Fluxes of N_2O were correlated with the NO_3^- content in soil and soil temperature. White clover increased the N_2O emissions by increasing the inorganic N content derived from degrading white clover in soil in summer.

• 社団法人日本土壌肥料学会の論文

著者

• MORI Akinori

  National Institute of Livestock and Grassland Science

• HOJITO Masayuki

  National Institute of Livestock and Grassland Science

• Mori Akinori

  National Inst. Of Livestock And Grassland Sci. Tochigi

• Kondo Hiroshi

  National Institute of Livestock and Grassland Science

• Matsunami Hisaya

  National Institute of Livestock and Grassland Science

• Scholefield David

  Institute of Grassland and Environmental Research, North Wyke Research Station

• Hojito Masayuki

  National Inst. Livestock And Grassland Sci. Tochigi Jpn

• Matsunami Hisaya

  Fukushima Agricultural Technol. Centre Fukushima

• Scholefield David

  Institute Of Grassland And Environmental Research North Wyke Research Station

関連論文

• Rapid simultaneous multi-element determination of soils and environmental samples with polarizing energy dispersive X-ray fluorescence (EDXRF) spectrometry using pressed powder pellets(Soil Chemistry and Soil Mineralogy)
• N_2O and CH_4 fluxes from a volcanic grassland soil in Nasu, Japan : Comparison between manure plus fertilizer plot and fertilizer-only plot(Environment)
• Grassland renovation increases N_2O emission from a volcanic grassland soil in Nasu, Japan(Environment)
• Effects of Plant Species on CH_4 and N_2O Fluxes from a Volcanic Grassland Soil in Nasu, Japan(Environment)
• Environmental Impacts of Grazing Grassland
• B-3. Environmental impacts of grazing grassland(Abstracts of the International Symposium on Recent Advances in Animal Science(IS-RAAS),Joint meeting of 2^ IS-AS and 3^ IS-IFS)
• Nitrous oxide and methane emissions from grassland treated with bark- or sawdust-containing manure at different rates(Environment)

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