We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
CH4 and N2O emissions and their potential control by rice biomass biochar: The case of continuously flooded paddy fields in Indonesia - A review
Summary
This review analyzes published data on methane (CH4) and nitrous oxide (N2O) emissions from continuously flooded paddy fields across different soil types in Indonesia and examines the potential of biochar derived from rice straw and rice husk to mitigate greenhouse gas emissions, finding that emissions vary significantly by soil type and region.
Methane (CH 4 ) and nitrous oxide (N 2 O) are the two most important greenhouse gases (GHG) from flooded paddy fields in Indonesia. This review aims to characterise CH 4 and N 2 O emissions from flooded paddy fields by published data analysis and to examine the potential of biochar from rice straw (RSB) and rice husk (RHB) to mitigate the emissions in Indonesia. A comparison of various box-plot datasets of CH 4 emissions showed that the different types of flooded paddy field soil cause varying amounts of CH 4 emissions from various regions in Indonesia. Sequentially, CH 4 emissions of flooded paddy fields from highest to lowest are Alluvial of Kalimantan and Sulawesi, Andisols of Java, Ultisols of Sumatra, Alfisols of Java and Bali and Inceptisols of Java and Bali, with a mean of 1062, 505, 446, 135 and 64 kg ha -1 season -1 , respectively. The organic amendments application combined with chemical fertilisers is the principal driver of anthropogenic CH 4 emissions from paddy fields. However, N chemical fertiliser application contributes only about 0.37% of the N 2 O flux, 0.69 kg ha -1 season -1 . The produced biochar number was insufficient effectively to reduce CH 4 and N 2 O emissions, at least 20 tonnes ha -1 year -1 , in addition to the pyrolysis process to produce biochar, releasing CH 4 emissions. Yet, with its recalcitrant properties and continuous application, RSB and RHB potentially reduce CH 4 and N 2 O emissions from paddy fields.
Sign in to start a discussion.
More Papers Like This
Effects of Biochar on Methane Emissions and Crop Yields in East Asian Paddy Fields: A Regional Scale Meta-Analysis
This regional meta-analysis of 43 studies found that biochar application to East Asian rice paddies significantly reduced methane emissions while increasing soil organic carbon and crop yields. The magnitude of these benefits depended on biochar feedstock type, application rate, and soil properties.
Nitrous oxide emissions from rice paddy: Impacts of rice straw and water management
This field study found that alternative wetting and drying irrigation reduced nitrous oxide emissions from rice paddies by 30-40% compared to continuous flooding, while rice straw application at higher rates increased emissions. The interaction between water management and straw application is key to minimizing greenhouse gas output from rice cultivation.
Effects of biochar addition on nitrous oxide emission during soil freeze–thaw cycles
Researchers conducted microcosm experiments to assess how maize straw biochar and rice straw biochar affect nitrous oxide emissions during soil freeze-thaw cycles under flooded and non-flooded conditions, finding both biochar types suppressed N2O emissions by approximately 67-69% compared to unamended soils and reduced nitrifier gene abundance.
Rice yield and carbon dioxide emissions in a paddy soil: A comparison of biochar and polystyrene microplastics
Researchers compared the effects of biochar and polystyrene microplastics on rice growth and carbon dioxide emissions in paddy soil. Both materials increased CO2 emissions, but biochar improved rice yield while microplastics did not provide the same benefits. The study suggests that microplastic accumulation in rice paddies could worsen greenhouse gas emissions without the soil-improvement benefits that biochar offers.
Effects of Straw Incorporation Years and Water-Saving Irrigation on Greenhouse Gas Emissions from Paddy Fields in Cold Region of Northeast China
Researchers conducted a field experiment in Northeast China comparing greenhouse gas (N2O, CO2, and CH4) emissions under four combinations of controlled versus flooded irrigation and one-year versus five-year straw incorporation in paddy fields, finding that straw incorporation duration and irrigation method both significantly influence GHG emissions in cold-region agriculture.