N_2O and CH_4 fluxes from a volcanic grassland soil in Nasu, Japan : Comparison between manure plus fertilizer plot and fertilizer-only plot

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We examined the effects of manure + fertilizer application and fertilizer-only application on nitrous oxide (N_2O) and methane (CH_4) fluxes from a volcanic grassland soil in Nasu, Japan. In the manure + fertilizer applied plot (manure plot), the sum of N mineralized from the manure and N applied as ammonium sulfate was adjusted to 210kgNha^<-1> year^<-1>. In the fertilizer-only applied plot (fertilizer plot), 210kgNha^<-1> year^<-1> was applied as ammonium sulfate. The manure was applied to the manure plot in November and the fertilizer was applied to both plots in March, May, July and September. From November 2004 to November 2006, we regularly measured N_2O and CH_4 fluxes using closed chambers. Annual N_2O emissions from the manure and fertilizer plots ranged from 7.0 to 11.0 and from 4.7 to 9.1kgNha^<-1>, respectively. Annual N_2O emissions were greater from the manure plot than from the fertilizer plot (P<0.05). This difference could be attributed to N_2O emissions following manure application. N_2O fluxes were correlated with soil temperature (R=0.70, P<0.001), NH^+_4 concentration in the soil (R=0.67, P<0.001), soil pH (R=-0.46, P<0.001) and NO^-_3 concentration in the soil (R=0.40, P<0.001). When included in the multiple regression model (R=0.72, P<0.001), however, the following variables were significant: NH^+_4 concentration in the soil (β=0.52, P<0.001), soil temperature (β=0.36, P<0.001) and soil moisture content (β=0.26, P<0.001). Annual CH_4 emissions from the manure and fertilizer plots ranged from -0.74 to -0.16 and from -0.84 to -0.52kgCha^<-1>, respectively. No significant difference was observed in annual CH_4 emissions between the plots. During the third grass-growing period from July to September, however, cumulative CH_4 emissions were greater from the manure plot than from the fertilizer plot (P<0.05). CH_4 fluxes were correlated with NH^+_4 concentration in the soil (R=0.21, P<0.05) and soil moisture content (R=0.20, P<0.05). When included in the multiple regression model (R=0.29, P<0.05), both NH^+_4 concentration in the soil (β=0.20, P<0.05) and soil moisture content (β=0.20, P<0.05) were significant.

収録刊行物

  • Soil science and plant nutrition

    Soil science and plant nutrition 54(4), 606-617, 2008-08-01

    一般社団法人日本土壌肥料学会

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被引用文献:  6件中 1-6件 を表示

各種コード

  • NII論文ID(NAID)
    110007326954
  • NII書誌ID(NCID)
    AA00844314
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00380768
  • NDL 記事登録ID
    9590448
  • NDL 雑誌分類
    ZR7(科学技術--農林水産--農産)
  • NDL 請求記号
    Z53-G349
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS 
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