Evaluation of Slag Application to Decrease Methane Emission from Paddy Soil and Fate of Iron
スポンサーリンク
概要
- 論文の詳細を見る
Organic carbon in paddy soil is oxidized to carbon dioxide by reducing electron acceptors for a certain period after submerging. Methane production commences after the reduction of iron oxide which is the most important electron acceptor in the soil. We aimed to study the long-term suppression of the methane emission from the paddy soil by single application of iron slag. A revolving furnace slag (RFS ; 248 g Fe kg^<-1>) was applied to the potted soil at the rate of 0 (control) or 20 ton ha^<-1> in 2000. Rice plants were successively cultivated on the potted soils for 3 years without further application of the RFS. Methane emissions from the potted soils with rice plants were measured by the closed chamber method during these cultivation periods. Total flux of CH_4 emission from the pot applied with RFS decreased by 5-30% compared with the control. The RFS supplied free iron oxide to the potted soil, and its iron acted as the oxidizing agent as evidenced by the increase in ferrous iron content in the soil. The amount of iron lost from leaching at the bottom of the pots was estimated as 54-59 kg Fe ha^<-1> year^<-1> at the percolation rate of 20 mm d^<-1>. Accordingly, half-life of the iron in the applied RFS was calculated as 42-46 years. Therefore, there is a possibility that the suppressing effect of RFS on CH_4 emission is sustained for a half-century. Contents of heavy metals (Cd, Cu, and Zn) in the brown rice harvested from the pot applied with RFS were not significantly different with those from the control pot.
- 社団法人日本土壌肥料学会の論文
著者
-
Inubushi Kazuyuki
Faculty Of Agriculture The University Of Tokyo
-
Furukawa Yuichiro
Graduate School Of Science And Technology Chiba University
-
Inubushi Kazuyuki
Faculty Of Ho〓culture Chiba University
関連論文
- Measurement of concentrations of trace metals in arable soils with animal manure application using instrumental neutron activation analysis and the concentrated acid digestion method(Environment)
- Accumulation of Zinc and Copper in an Arable Field after Animal Manure Application (Environment)
- 17-3 Effect of different organic amendments and ferrous sulfate application on the mycorrhizal infection of highbush blueberry root system
- Properties of Microbial Biomass in Acid Soils and Their Turnover
- Production Potential and Emission of Methane in Flooded Rice Soil Microcosms after Continuous Application of Straws
- Methanogenic Characteristics of Flooded Rice Soils in Response to Glucose Amendment
- PB-69 Dynamic of greenhouse gases emission and bacteria communities in a corn field applied with different fertilizers in South Sulawesi, Indonesia(Agricultural soil ecosystem,Session B,(1) Poster Presentation)
- Transport of Trace Elements through the Hyphae of an Arbuscular Mycorrhizal Fungus into Marigold Determined by the Multitracer Technique
- Uptake of 15 Trace Elements in Arbuscular Mycorrhizal Marigold Measured by the Multitracer Technique
- Decomposition and CO_2-C Evolution of Okara, Sewage Sludge, Cow and Poultry Manure Composts in Soils (Soil Biology)