Abstract
Adoption of the right rice variety and water-saving irrigation method could reduce greenhouse gas (GHG) emissions in lowland rice cultivation. A study was conducted at the research farm of Bangladesh Agricultural University, Mymensingh, Bangladesh, in 2019 during the Boro (dry) season to determine the impacts of different rice varieties (BRRI dhan29, BRRI dhan47, BRRI dhan69, Binadhan-8, Binadhan-10, and Binadhan-17) on methane (CH4) emissions under two irrigation methods, i.e., alternate wetting and drying (AWD) and continuous flooding (CF). The treatments were laid out in a split-plot design, considering water regime as the main plots and rice variety as the sub-plots. The emission rates of CH4 were determined by collecting air samples using the closed chamber technique and measuring the concentrations using a gas chromatograph. CH4 emission rates varied with the growth and development of the rice varieties. The lowest cumulative CH4 emission rate was observed in Binadhan-17, particularly under AWD irrigation. Across the rice varieties, AWD irrigation significantly reduced the cumulative CH4 emissions by about 35% compared with CF. No significant variation in rice yield was observed between AWD (5.38 t ha−1) and CF (5.16 t ha−1). This study suggests that the cultivation of Binadhan-17 under AWD irrigation could be effective at reducing the carbon footprint of lowland rice fields.
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Claims 5
Claim · model-written summary
Methane emissions varied across rice growth and development.
- Taxon
- rice
Oryza sativae0 - Outcome
- CH4 emission ratese0
- Direction
- variede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CH4 emission rates varied with the growth and development of the rice varieties”
Claim · model-written summary
Binadhan-17 had the lowest cumulative methane emissions, particularly with AWD irrigation.
- Taxon
- riceOryza sativae1
- Material
- Binadhan-17e0
- Treatment
- AWD irrigatione0
- Outcome
- cumulative CH4 emission ratee0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest cumulative CH4 emission rate was observed in Binadhan-17, particularly under AWD irrigation”
e1“different rice varieties (BRRI dhan29”
Claim · model-written summary
AWD reduced cumulative methane emissions about 35% against continuous flooding.
- Taxon
- riceOryza sativae0
- Treatment
- AWD irrigatione0
- Outcome
- cumulative CH4 emissionse0
- Direction
- reducede0
- Value
- about 35%e0
- Comparator
- CFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Across the rice varieties, AWD irrigation significantly reduced the cumulative CH4 emissions by about 35% compared with CF”
Claim · model-written summary
Rice yield did not vary significantly between AWD and CF, at 5.38 and 5.16 t ha−1.
- Taxon
- riceOryza sativae0
- Treatment
- AWDe0
- Outcome
- rice yielde0
- Direction
- No significant variatione0
- Value
- 5.38 t ha−1e0
- Qualifier
- 5.16 t ha−1e0
- Comparator
- CFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant variation in rice yield was observed between AWD (5.38 t ha−1) and CF (5.16 t ha−1)”
Claim · model-written summary
The authors suggest Binadhan-17 under AWD to reduce lowland rice carbon footprint.
- Taxon
- riceOryza sativae0
- Material
- Binadhan-17e0
- Treatment
- AWD irrigatione0
- Outcome
- reducing the carbon footprint of lowland rice fieldse0
- Direction
- reducinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the cultivation of Binadhan-17 under AWD irrigation could be effective at reducing the carbon footprint of lowland rice fields”
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