Email this article BAMBOO BIOCHAR APPLICATION MITIGATES CH4 AND N2O EMISSIONS FROM A RICE PADDY
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Received: 23/04/23 Revised: 31/05/23 Published: 31/05/23Authors
1. Pham Ngoc Thoa
, Ben Tre College2. Tang Le Hoai Ngan, Ngoc Xuan Seafood Corporation
Abstract
Biogas production from livestock production is very common in rural areas in the Mekong Delta. Biogas effluent is an excellent organic fertilizer for rice cultivation. Since the effluent contains labile organic carbon, the substrate for microbial CH4 production, there is concern that the waterlogged soil will transmit more gases (CH4) under reductive conditions. Therefore, in this study, the option of combining wastewater after biogas and bamboo biochar was proposed to reduce greenhouse gas in rice fields. A greenhouse potted experiment with six treatments was set up, with the soil supplemented with bamboo biochar ranging from 2 to 20 tons/ha and post-biogas wastewater used instead of chemical fertilizers. According to the study results, all treatments that include bamboo biochar had a reduction in CH4 emissions of 20% to 46% compared to the control. Simultaneously, N2O emissions were reduced by up to 44%. Finally, bamboo biochar reduced greenhouse gas emissions by 35.9 - 45.6% (in CO2 equivalent).
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DOI: https://doi.org/10.34238/tnu-jst.7802
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