Effects of warming on rice production and metabolism process associated with greenhouse gas emissions
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View abstract on PubMed
Summary
This summary is machine-generated.Global warming significantly reduced rice yield and biomass in single-cropping systems. It also increased methane (CH4) emissions, highlighting the need to mitigate greenhouse gas (GHG) emissions and boost crop production.
Area Of Science
- Agricultural Science
- Climate Science
- Environmental Science
Background
- Global warming impacts on rice production and greenhouse gas (GHG) emissions are critical for food security and climate change mitigation.
- The effects of warming on crop production, GHG emissions, and microbial mechanisms in single-cropping rice systems are not fully understood.
Purpose Of The Study
- To investigate the effects of warming on rice crop production, GHG emissions, and associated microbial functional genes in a single-cropping rice system.
- To assess the impact of a 2.7-3.0°C average temperature increase during the rice growing season.
Main Methods
- A two-year field experiment was conducted to simulate warming conditions.
- Measurements included crop yield components, seasonal methane (CH4) and nitrous oxide (N2O) emissions, and the relative abundance of microbial genes involved in GHG metabolism.
Main Results
- Warming significantly reduced aboveground biomass, grain yield, grain weight, spikelets per panicle, and seed-setting rate.
- Conversely, warming increased the number of panicles and significantly elevated seasonal CH4 emissions while reducing N2O emissions.
- The abundance of genes related to CH4 metabolism (production and oxidation) and nitrogen metabolism increased, while those for N2O denitrification were unaffected.
Conclusions
- Warming negatively impacts rice yield and biomass in single-cropping systems.
- Increased CH4 emissions and global warming potential were observed under warming conditions.
- Strategies are needed to reduce GHG emissions and enhance crop yields to meet growing food demand and mitigate climate change.
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