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Evaluating the Impact of Single Application and Co-applications of Mangrove Biochar on CH4 and N2O Emissions, Soil Properties and Yield on Farmer’s Traditional Rice Cultivation

Patikorn Sriphirom 1, Sirintornthep Towprayoon 2, and Amnat Chidthaisong 2
1. The Joint Graduate School of Energy and Environment (JGSEE) and Center of Excellence on Energy Technology and Environment, King Mongkut’s University of Technology Thonburi (KMUTT), Bangkok, Thailand
2. The Joint Graduate School of Energy and Environment (JGSEE), Earth System Science Research Cluster and Center of Excellence on Energy Technology and Environment, King Mongkut’s University of Technology Thonburi (KMUTT), Bangkok, Thailand
Abstract—Application of biochar to replace traditional practice is limited due to its variation impact on rice yield and environmental outputs such as soil properties and Greenhouse Gas (GHG) emissions. This study cultivated rice in the wet and dry seasons to compare effect of single application (BI) and co-applications of mangrove biochar with compost (BC) or chemical fertilizer (BF) with farmer’s traditional practice (CT) in order to recommend the optimum practice for yield increasing and GHG reduction. As compared to CT, it showed that BI, BC and BF reduced the seasonal emissions of CH4 by 39.4%, 29.3% and 10.9% and N2O by 32.9%, 31.2% and 9.42%, respectively. Soil pH, OM, C and CEC were increased while bulk density was reduced for all of BI, BC and BF significantly. After two cultivation seasons, SOC stock significantly increased by 45.3%, 45.9% and 45.0% in BI, BC and BF respectively. BI and BC significantly reduced grain yield by 21.4% and 11.8% respectively but was enhanced in BF by 3.94%. Therefore, co-application of biochar with chemical fertilizer is the optimal practice to promote the replacement of farmer’s traditional practice in order to improve soil properties and increase yield with partially mitigated CH4 and N2O emissions.
 
Index Terms—biochar application, biochar co-application, CH4 emission, N2O emission, SOC stock, rice yield

Cite: Patikorn Sriphirom, Sirintornthep Towprayoon, and Amnat Chidthaisong, "Evaluating the Impact of Single Application and Co-applications of Mangrove Biochar on CH4 and N2O Emissions, Soil Properties and Yield on Farmer’s Traditional Rice Cultivation," Journal of Advanced Agricultural Technologies, Vol. 7, No. 1, pp. 8-13, June 2020. Doi: 10.18178/joaat.7.1.8-13

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