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How much methane is emitted in paddy fields per hectare per cycle in japan after harvest using rice biochar? 


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After harvest in Japan, the methane emissions in paddy fields per hectare per cycle can vary based on different treatments. Research suggests that biochar application can influence methane emissions. Studies indicate that in fallow seasons, biochar application can lead to slightly higher methane emissions compared to control treatments, with values around 2.3 kg C ha−1 for biochar-treated fields and 1.2 kg C ha−1 for control fields . Conversely, another study found that the application of rice husk charcoal at different rates did not significantly affect methane emissions compared to the control treatment, with seasonal cumulative emissions being 38–47% higher but not proportional to the application rates . Therefore, the methane emissions in paddy fields per hectare per cycle in Japan after harvest using rice biochar can range from 1.2 to 2.3 kg C ha−1, depending on the specific biochar application and field conditions.

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After harvest, paddy fields in Japan emit approximately 2.3 kg of methane per hectare per cycle when using bamboo biochar, slightly higher than the control without biochar application.
After harvest, paddy fields in Japan emit 38-47% more methane per hectare when treated with rice husk charcoal, but the increase is not proportional to the application rate.

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