EFFECTS OF BAMBOO BIOCHAR AND RICE HUSK BIOCHAR ON CH4 AND N2O EMISSION FROM ALLUVIAL PADDY SOIL IN LABORATORY CONDITION
Main Article Content
Abstract
The application of biochar is a potential new solution to reduce greenhouse gas (GHG) emissions, in mitigating climate change. This study was conducted to evaluate and compare effective CH4 and N2O emissions from paddy soil supplemented with bamboo biochar and rice husk biochar in conditional continuous flooding. The study was carried out in the condition of 90% moisture paddy soil. The seven treatments based on a completely randomized design included both (i) bamboo biochar (BB) and (ii) rice husk biochar (RB) with 0.2%, 0.5%, and 1% and control (CON, without biochar). The main process in the condition of continuous flooding was the emission of CH4 and not N2O. The additional use of bamboo biochar with 0.2%, 0.5%, and 1% reduced total CH4 emissions by 19.10%, 27.74%, and 25.65% compared to CON. Similarly, applying RB with the ratio of 0.2%, 0.5%, and 1% reduced total CH4 emission by 32.59%, 29.53%, and 38.54% compared to CON. Using BB and RB decreased 19.15-27.71% and 29.56-38.49% of total GHG emission (CO2eq), respectively. Adding rice husk biochar and bamboo biochar was effective in lowering the quantity of CH4 and N2O emitted, with the rate of 1% rice husk biochar providing the best emission reduction impact in the experiment.
Keywords
alluvial soil, bamboo biochar, CH4 emission, rice husk biochar, N2O emission
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References
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