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.
منابع مشابه
Greenhouse gas emissions from rice
Rice provides the staple food for over 60% of the world’s population. Globally 80% of rice is grown by small farmers in low income and developing nations, and in India rice farming is a key source of employment for the 60% of Indian workers still dependent on agriculture for work. Yet rice production is also an important source of greenhouse gas emissions, for example responsible for between 3 ...
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[1] Since the early 1980s, water management of rice paddies in China has changed substantially, with midseason drainage gradually replacing continuous flooding. This has provided an opportunity to estimate how a management alternative impacts greenhouse gas emissions at a large regional scale. We integrated a process-based model, DNDC, with a GIS database of paddy area, soil properties, and man...
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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