Effect of biochar on CH4 and N2O emission from soils vegetated with paddy |
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Authors: | Ankit Singla Kazuyuki Inubushi |
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Affiliation: | 1. Graduate School of Horticulture, Chiba University, Matsudo, Chiba, 271-8510, Japan
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Abstract: | Biochar is believed to have positive impact on soil properties and plant yield. Due to the presence of C, it can also enhance CH4 emission in paddy soils. On the other hand, ammonium sulphate can decrease CH4 emission due to negative impacts on methanogenesis. Keeping these points in view, a pot experiment was conducted to determine the effect of biochar along with ammonium sulphate on CH4 and N2O emission from paddy soil. Analysis revealed that biochar treated soils released more CH4 compared to untreated. Ammonium sulphate treated soil emitted the highest N2O whereas biochar addition decreased its emission significantly. Further, total emission was found to be higher for CH4 (16.9–34.7 g/m2) in comparison to N2O (?0.05 to 0.02 g/m2) for all treatments. Biochar application has positive impact on plant variables such as panicle number and weight of panicles. This study suggests that biochar 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 biochar could be attributed to the increase in plant biomass. |
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