Reducing greenhouse gas emissions and improving rice yield: The influence of cultivars, soil salinity, and nitrogen management
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View abstract on PubMed
Summary
This summary is machine-generated.Selecting climate-smart rice cultivars and optimizing nitrogen fertilizer can significantly reduce greenhouse gas emissions, including methane and nitrous oxide, from rice cultivation without compromising yield.
Area Of Science
- Agricultural Science
- Environmental Science
- Climate Change Research
Background
- Rice cultivation is a major source of greenhouse gas emissions, contributing to global climate change.
- Effective mitigation strategies are crucial for sustainable agricultural practices.
Purpose Of The Study
- To evaluate the impact of different rice cultivars and nitrogen rates on methane (CH4) and nitrous oxide (N2O) emissions in Bangladesh.
- To compare emissions and yield in non-saline and coastal saline soil environments.
Main Methods
- A multi-location field experiment was conducted over two seasons (Boro and Aman) with four rice cultivars and two nitrogen rates.
- Methane (CH4) and nitrous oxide (N2O) emissions were measured, alongside crop yield and nitrogen uptake.
- Statistical analysis was used to determine the significance of different factors on emissions and yield.
Main Results
- Specific rice cultivars (BRRI dhan67, BRRI hybrid dhan3, BRRI dhan75, BRRI hybrid dhan6) demonstrated significant reductions in methane (CH4) emissions.
- A 20% reduction in nitrogen fertilizer decreased CH4 by 6% and N2O by 17% with no significant yield loss.
- Coastal saline soils emitted approximately 10% less CH4 than non-saline soils, though non-saline soils showed higher yield and nitrogen uptake.
Conclusions
- Climate-smart rice cultivars and optimized nitrogen management are effective strategies for reducing greenhouse gas emissions in rice cultivation.
- Sustainable, low-emission rice production is achievable in both saline and non-saline environments through careful cultivar selection and nutrient management.
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