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Effect of biochar and its combined application with manure and fertilizer on nitrogen leaching, greenhouse gas (GHG) emissions, and grain yield under alternate wetting and drying (AWD) system

Visal Vat, The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok, Thailand., Amnat Chidthaisong, Sirintornthep Towprayoon, The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok, Thailand., The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok, Thailand.
2020 Journal of Agricultural and Crop Research  

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The application of biochar to the adoption of alternate wetting and drying (AWD) system is crucial to mitigate greenhouse gas (GHG) emissions, soil nutrient retention, and maximize crop productivities in rice cultivation. In this study, the lysimeter experiment was carried out to determine the ability of biochar and its co-application with manure or fertilizer on nitrogen (N) leaching, GHG emissions, and grain yield under the AWD system. The results showed that biochar application alone could
more » ... t reduce the total NH4 + -N and NO3 --N losses as compared to control. N loss varied depending on the N input and peaked mainly in the combined treatment soil especially after fertilization and re-watering of the AWD system. However, the total CH4 emissions were reduced by 20.92 to 25.75% in soils amended with biochar alone while N2O emissions were sharply reduced by 6.84 to 13.46%, respectively, compared to control. Both CH4 and N2O peaked in the following day after fertilizer, while CH4 reduced during AWD and N2O increased. Biochar co-application was increased by N leaching loss with higher emissions due to high N input to the system. The results show that biochar application alone significantly (p < 0.05) increased rice yields by 9.49 to 14.10% compared to treatment without it. In addition, the co-application with both manure and fertilizer were increased grain yield but nevertheless high GHG emission. When compared biochar combination between manure and fertilizer, we found it was beneficial in terms of yield production with lower emissions in biochar with manure than with fertilizer.
doi:10.33495/jacr_v8i2.19.168 fatcat:rj3b7434izaojovkbnccj52owu
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Visal Vat, The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok, Thailand., Amnat Chidthaisong, Sirintornthep Towprayoon, The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok, Thailand., The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok, Thailand.. "Effect of biochar and its combined application with manure and fertilizer on nitrogen leaching, greenhouse gas (GHG) emissions, and grain yield under alternate wetting and drying (AWD) system." Journal of Agricultural and Crop Research 8.2 (2020) 33-47