Abstract
Abstract This experiment aims to study the effect of water‐saving irrigation on rice production and methane emissions. Three irrigation methods, that is, flooding irrigation, deficit irrigation (DI) and alternate partial root‐zone drying (APRD), were employed in a 2‐year field trial. The experiment was conducted in a randomized complete block design with three replications. For the DI and APRD treatments, plots were not irrigated until the soil matric potential reached −10 (DI10 and APRD10), −30 (DI30 and APRD30) and −60 kPa (DI60 and APRD60). In the APRD treatments, two adjacent furrows of each plant row were alternately irrigated in consecutive irrigation events. The DI and APRD treatments did not affect yield components when the soil matric potential was −10 kPa. Applying APRD treatments increased irrigation water productivity by 45%, 51% and 31% for soil matric potentials of −10, −30 and −60 kPa, respectively. On average, water stress treatments reduced methane emissions by 78% compared to flooding treatment. On average, the APRD treatments decreased the water input by 10% compared with the DI treatments while achieving a 2.5% higher yield. This is the first study to outline the effect of APRD on methane emissions and rice production. These findings suggest that APRD could be a valuable strategy to mitigate methane emissions without risking rice yield reduction.
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Claims 8
Claim · model-written summary
DI and APRD at −10 kPa did not affect yield components.
- Taxon
- rice
Oryza sativat0 - Treatment
- DI and APRD treatmentse0
- Outcome
- yield componentse0
- Direction
- did not affecte0
- Qualifier
- −10 kPae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The DI and APRD treatments did not affect yield components when the soil matric potential was −10 kPa.”
t0“rice”
Claim · model-written summary
APRD at −10 kPa increased irrigation water productivity by 45%.
- Taxon
- riceOryza sativat0
- Treatment
- APRD treatmentse0
- Outcome
- irrigation water productivitye0
- Direction
- increasede0
- Value
- 45%e0
- Qualifier
- −10e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying APRD treatments increased irrigation water productivity by 45%, 51% and 31% for soil matric potentials of −10, −30 and −60 kPa, respectively.”
t0“rice”
Claim · model-written summary
APRD at −30 kPa increased irrigation water productivity by 51%.
- Taxon
- riceOryza sativat0
- Treatment
- APRD treatmentse0
- Outcome
- irrigation water productivitye0
- Direction
- increasede0
- Value
- 51%e0
- Qualifier
- −30e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying APRD treatments increased irrigation water productivity by 45%, 51% and 31% for soil matric potentials of −10, −30 and −60 kPa, respectively.”
t0“rice”
Claim · model-written summary
APRD at −60 kPa increased irrigation water productivity by 31%.
- Taxon
- riceOryza sativat0
- Treatment
- APRD treatmentse0
- Outcome
- irrigation water productivitye0
- Direction
- increasede0
- Value
- 31%e0
- Qualifier
- −60 kPae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying APRD treatments increased irrigation water productivity by 45%, 51% and 31% for soil matric potentials of −10, −30 and −60 kPa, respectively.”
t0“rice”
Claim · model-written summary
Water stress treatments reduced methane emissions 78% relative to flooding.
- Taxon
- riceOryza sativat0
- Treatment
- water stress treatmentse0
- Outcome
- methane emissionse0
- Direction
- reducede0
- Value
- 78%e0
- Comparator
- flooding treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress treatments reduced methane emissions by 78% compared to flooding treatment”
t0“rice”
Claim · model-written summary
APRD reduced water input 10% relative to DI.
- Taxon
- riceOryza sativat0
- Treatment
- APRD treatmentse0
- Outcome
- water inpute0
- Direction
- decreasede0
- Value
- 10%e0
- Comparator
- DI treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the APRD treatments decreased the water input by 10% compared with the DI treatments while achieving a 2.5% higher yield”
t0“rice”
Claim · model-written summary
APRD gave 2.5% higher yield than DI.
- Taxon
- riceOryza sativat0
- Treatment
- APRD treatmentse0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 2.5%e0
- Comparator
- DI treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the APRD treatments decreased the water input by 10% compared with the DI treatments while achieving a 2.5% higher yield”
t0“rice”
Claim · model-written summary
APRD could mitigate methane without risking rice yield reduction.
- Taxon
- riceOryza sativae0
- Outcome
- APRD could be a valuable strategy to mitigate methane emissions without risking rice yield reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“APRD could be a valuable strategy to mitigate methane emissions without risking rice yield reduction”
The same questions in other papers
irrigation · physiology: water · Oryza sativa (rice)Positive and negative results
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- positive
- positive
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See all 380 papers →irrigation · yield · Oryza sativa (rice)Positive and negative results
905 papers in the same direction as this paper · 201 in the opposite direction · 64 reporting no difference from an alternative
- no effect
- positive
- positive
1,167 papers more in this group
See all 1,171 papers →drought · environment: emissions · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.