Effect of post-harvest practices on greenhouse gas emissions in rice paddies: flooding regime and straw management

نویسندگان

چکیده

Abstract Aims To assess 1) the effect of combination flooding (winter vs. non-winter flooding; WFL vs NWF) and timing straw incorporation (early late incorporation; ESI LSI) in post-harvest paddy agrosystem, on a year-round global balance greenhouse gases (GHG) exchanges, i.e. methane (CH 4 ), carbon dioxide (CO 2 ) nitrous oxide (N O); 2) impact net ecosystem (NECB) 3) resulting warming potential (GWP). Methods A field experiment was conducted with fortnightly samplings main GHG emissions. Effect studied factors emissions seasonally assessed. The GWP is estimated from between N O) NECB. Results NWF-LSI reduced by 206% compared to conventional management (WFL-ESI). NECB similar all treatments. Avoiding winter CH significantly next growing seasons, while delay prevented CO during post-harvest. None treatments increased O emission. Environmental implications options are discussed. Conclusions Post-harvest affects rice cultivation modifying season without compromise sequestration C budget. strategies were more effective reducing both emissions, due avoiding higher temperatures at time increasing soil Eh conditions following season.

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ژورنال

عنوان ژورنال: Plant and Soil

سال: 2022

ISSN: ['0032-079X', '1573-5036']

DOI: https://doi.org/10.1007/s11104-021-05234-y