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| Effect of Biogas Digested Liquid on CH4 and N2O Flux in Paddy Ecosystem |
| Ankit Singla , Kazuyuki Inubushi |
| Bioresource Science, Graduate School of Horticulture, Chiba University, Matsudo, Chiba 271-8510, Japan |
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摘要 Biogas production generates digested slurry as a byproduct. It can be used as a fertilizer especially after its conversion into digested liquid. A pot based study was conducted in order to evaluate the effect of the application of digested liquid on CH4 and N2O flux, and plant biomass in paddy. Analysis revealed that digested liquid treated soils released more CH4 compared to ammonium sulphate and the control. Ammonium sulphate treated soil emitted the highest N2O whereas digested liquid application decreased its emission significantly. Further, the cumulative emission over 101 d of the experiment was found to be higher for CH4 (16.9 to 29.9 g m-2) compared to N2O (-49.3 to 18.9 mg m-2) for all treatments. Digested liquid application had positive impact on plant variables such as panicle number and weight of panicles. This study suggests that digested liquid application significantly decrease N2O emission and increase CH4 emission possibly due to affecting the availability of organic C in the soil to microbial activity for methanogenesis. Another possibility for enhancing CH4 emission by following biogas digested liquid could be attributed to the increase in plant biomass.
Abstract Biogas production generates digested slurry as a byproduct. It can be used as a fertilizer especially after its conversion into digested liquid. A pot based study was conducted in order to evaluate the effect of the application of digested liquid on CH4 and N2O flux, and plant biomass in paddy. Analysis revealed that digested liquid treated soils released more CH4 compared to ammonium sulphate and the control. Ammonium sulphate treated soil emitted the highest N2O whereas digested liquid application decreased its emission significantly. Further, the cumulative emission over 101 d of the experiment was found to be higher for CH4 (16.9 to 29.9 g m-2) compared to N2O (-49.3 to 18.9 mg m-2) for all treatments. Digested liquid application had positive impact on plant variables such as panicle number and weight of panicles. This study suggests that digested liquid application significantly decrease N2O emission and increase CH4 emission possibly due to affecting the availability of organic C in the soil to microbial activity for methanogenesis. Another possibility for enhancing CH4 emission by following biogas digested liquid could be attributed to the increase in plant biomass.
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Received: 09 October 2013
Accepted:
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| Fund: The first author is thankful to Indian Council of Agricultural. Research (ICAR), India, to provide financial support under. International Fellowship Scheme to carry out this study. |
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Corresponding Authors:
Ankit Singla, Tel: +81-47-3088818, Fax: +81-47-3088720, E-mail: ankitsingla2607@yahoo.co.in
E-mail: ankitsingla2607@yahoo.co.in
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| About author: Ankit Singla, Tel: +81-47-3088818, Fax: +81-47-3088720, E-mail: ankitsingla2607@yahoo.co.in |
Cite this article:
Ankit Singla , Kazuyuki Inubushi.
2014.
Effect of Biogas Digested Liquid on CH4 and N2O Flux in Paddy Ecosystem. Journal of Integrative Agriculture, 13(3): 635-640.
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