Effect of chemical fertilizer and manure application on N_2O emission from reed canary grassland in Hokkaido, Japan

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We evaluated the effect of chemical fertilizer and manure applications on N2O emission from a managed grassland by establishing three treatment plots of chemical N fertilizer (chemical fertilizer), manure combined chemical N fertilizer (manure) and no N fertilizer (control) at the Shizunai Experimental Livestock Farm in southern Hokkaido, Japan. N2O fluxes from soils were measured by a closed-chamber method from May 2005 to April 2008. Soil denitrifying enzyme activity (DEA) in root-mat layer (0-2.5cm) and mineral soil layer (2.5-5cm) of each treatment plot was measured by an acetylene inhibition method after treatment with NO^[-]_[3]-N and glucose addition and neither NO^[-]_[3]-N nor glucose addition, respectively. Annual N2O emission ranged from 0.6 4.9 kg N2O-N ha^[-1]yr^[-1], with the highest observed in manure plot and lowest in control plot. Chemical fertilizer-induced emission factor (EF) (range: 0.85-1.32%) was significantly higher than manure-induced EF (range 0.35-0.85%). Denitrification potential of soil horizons was measured with addition of both NO^[-]_[3]-N and glucose, which was significantly higher in root-mat soil than that in mineral soil. Soil DEA in root-mat in NO^[-]_[3]-N addition with and without addition of glucose had a significantly positive correlation with soil pH (P < 0.05). Soil pH was significantly influenced by N source, which was significantly lower in chemical fertilizer plot than that in control and manure plot. For a fixed quantity of available N, the application of manure could result in higher N2O emission compared with chemical fertilizer owing to high soil pH values under manure application than under chemical fertilizer application.

We evaluated the effect of chemical fertilizer and manure applications on N_2O emission from a managed grassland by establishing three treatment plots of chemical N fertilizer (chemical fertilizer), manure combined with chemical N fertilizer (manure) and no N fertilizer (control) at the Shizunai Experimental Livestock Farm in southern Hokkaido, Japan. The N_2O fluxes from the soils were measured using a closed-chamber method from May 2005 to April 2008. Soil denitrifying enzyme activity (DEA) in the root-mat layer (0-2.5cm) and in the mineral soil layer (2.5-5cm) of each treatment plot was measured using an acetylene inhibition method after treatment with NO_3^--N addition, glucose addition, both NO_3^--N and glucose addition or neither NO_3^--N nor glucose addition. Annual N_2O emission ranged from 0.6 to 4.9kg N_2O-N ha^<-1> year^<-1>, with the highest emission observed in the manure plot and the lowest in the control plot. The chemical fertilizer induced emission factor (EF) (range: 0.85-1.32%) was significantly higher than the manure-induced EF (range: 0.35-0.85%). The denitrification potential of the soil horizons was measured with the addition of both NO_3^--N and glucose, and was significantly higher in root-mat soil than in mineral soil. Soil DEA in the root mat with the addition of NO_3^--N with and without the addition of glucose had a significantly positive correlation with soil pH (P<0.05). Soil pH was significantly influenced by N source, which was significantly lower in the chemical fertilizer plot than in the control and manure plots. For a fixed quantity of available N, the application of manure could result in higher N_2O emission compared with chemical fertilizer, owing to higher soil pH values under manure application than under chemical fertilizer application.

収録刊行物

  • Soil science and plant nutrition

    Soil science and plant nutrition 56(1), 53-65, 2010-02-01

    一般社団法人日本土壌肥料学会

参考文献:  44件中 1-44件 を表示

被引用文献:  3件中 1-3件 を表示

各種コード

  • NII論文ID(NAID)
    110008144298
  • 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
    10598337
  • NDL 請求記号
    Z53-G349
  • DOI
    info:doi/10.1111/j.1747-0765.2010.00447.x
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  IR 
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