Impacts of Application of Methane Fermentation Digested Liquid on Green House Gas Emissions and Nitrogen Leaching from Upland Field

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  • メタン発酵消化液の施用が畑地土壌からの温室効果ガス発生と窒素溶脱に及ぼす影響
  • メタン ハッコウ ショウカエキ ノ シヨウ ガ ハタチ ドジョウ カラ ノ オンシツ コウカ ガス ハッセイ ト チッソ ヨウ ダツ ニ オヨボス エイキョウ

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Nitrogen uptake by crops, green-house gas emissions and nitrogen leaching were studied by using monolith lysimeters applied with digested liquid or ammonium sulfate to evaluate the environmental impacts of applications of methane fermentation digested liquid on Andosol upland field. A two-year experiment indicated the percentages of nitrogen uptake, leached nitrogen and nitrous oxide (N2O) emissions to each material-derived nitrogen were 27%, 44% and 0.41% in the digested liquid plot and 32%, 46% and 0.11% in the ammonium sulfate plot.<br>The results show that digested liquid is readily release fertilizer like ammonium sulfate, and nitrogen is leached as easily from the digested liquid as from the ammonium sulfate and the N2O emissions from the digested liquid plot are higher than from the ammonium sulfate plot.

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