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http://dx.doi.org/10.17137/korrae.2018.26.2.11

Reduction of Carbon Dioxide and Nitrous Oxide Emissions through Various Biochars Application in the Upland  

Lee, Sun-Il (Climate Change & Agroecology Division, National Institute of Agricultural Sciences)
Kim, Gun-Yeob (Climate Change & Agroecology Division, National Institute of Agricultural Sciences)
Choi, Eun-Jung (Climate Change & Agroecology Division, National Institute of Agricultural Sciences)
Lee, Jong-Sik (Climate Change & Agroecology Division, National Institute of Agricultural Sciences)
Jung, Hyun-Cheol (Climate Change & Agroecology Division, National Institute of Agricultural Sciences)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.26, no.2, 2018 , pp. 11-18 More about this Journal
Abstract
Biochar is a carbon-rich solid product obtained by the pyrolysis of biomass. It has been suggested to mitigate climate change through increased carbon storage and reduction of greenhouse gas emission. The objective of this study was to evaluate carbon dioxide ($CO_2$) and nitrous oxide ($N_2O$) emissions from soil after various biochars addition. The biochars were produced by pyrolysing pear branch, rice hull and bean straw at $400{\sim}500^{\circ}C$. The treatments were consisted of a control without input of biochar and three type biochars input as 5.0 Mg/ha. Emissions of $CO_2$ and $N_2O$ from upland soil were determined using closed chamber for 8 weeks at $25^{\circ}C$ of incubation temperature. It was shown that the cumulative $CO_2$ were 207.1 to $255.2g\;CO_2/m^2$ for biochar input treatments and $258.6g\;CO_2/m^2$ for the control after experimental periods. The cumulative $CO_2$ emission was slightly decreased in biochar input treatment compared to the control. It was appeared that cumulative $N_2O$ emissions were $2,890.6mg\;N_2O/m^2$ for control, 379.7 to $525.2mg\;N_2O/m^2$ for biochar input treatment at the end of experiment. All biochar treatments were found to significantly reduce $N_2O$ emission by 82~87%. Consequently the biochar from byproducts such as pear branch, rice hull and bean straw could suppress the soil $N_2O$ emission. The results from the study imply that biochar can be utilized to reduce greenhouse gas emission from the upland field.
Keywords
Biochar; Carbon dioxide; Inorganic nitrogen; Nitrous oxide;
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Times Cited By KSCI : 3  (Citation Analysis)
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