Abstract
Ridge irrigation (RI) is a water-saving irrigation technique for paddy fields. To obtain a suitable mode of RI in increasing rice yield and reducing greenhouse gas (GHG) emissions from paddy fields, taking conventional irrigation (CI) as a control, the effects of RI with different ridge widths on rice yield, methane (CH4) and nitrous oxide (N2O) emissions, global warming potential (GWP) and GHG emission intensity (GHGI) in paddy fields of south China were investigated using the double-cropping rice field experiments. Compared with CI mode, RI with ridge width of 80 cm (RI80) increased the yields of double-cropping rice by 11.3–17.6% and decreased CH4 emissions from double-cropping rice fields by 45.6–70.3%. However, RI80 mode slightly increased N2O emissions from double-cropping rice fields. Compared with CI mode, RI80 mode decreased GWP and GHGI in double-cropping rice fields by 45.2–61.4% and 52.5–74.8%, respectively. Thus, the RI with ridge width of 80 cm was the optimal mode in increasing the yields of double-cropping rice and decreasing CH4 emission, GWP and GHGI in this study.
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Claims 6
Claim · model-written summary
RI80 increased double cropping rice yield by 11.3–17.6% versus conventional irrigation.
- Taxon
- rice
Oryza sativae0 - Treatment
- RI with ridge width of 80 cm (RI80)e0
- Outcome
- yields of double-cropping ricee0
- Direction
- increasede0
- Value
- 11.3–17.6%e0
- Comparator
- CI modee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CI mode, RI with ridge width of 80 cm (RI80) increased the yields of double-cropping rice by 11.3–17.6%”
Claim · model-written summary
RI80 decreased methane emissions from rice fields by 45.6–70.3% versus conventional irrigation.
- Taxon
- riceOryza sativae0
- Treatment
- RI with ridge width of 80 cm (RI80)e0
- Outcome
- CH4 emissions from double-cropping rice fieldse0
- Direction
- decreasede0
- Value
- 45.6–70.3%e0
- Comparator
- CI modee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CI mode, RI with ridge width of 80 cm (RI80) increased the yields of double-cropping rice by 11.3–17.6% and decreased CH4 emissions from double-cropping rice fields by 45.6–70.3%”
Claim · model-written summary
RI80 slightly increased nitrous oxide emissions from rice fields.
- Taxon
- riceOryza sativae0
- Treatment
- RI80 modee0
- Outcome
- N2O emissions from double-cropping rice fieldse0
- Direction
- increasede0
- Qualifier
- slightlye0
- Comparator
- CI modee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RI80 mode slightly increased N2O emissions from double-cropping rice fields”
e1“Compared with CI mode, RI80 mode”
Claim · model-written summary
RI80 decreased global warming potential by 45.2–61.4% versus conventional irrigation.
- Taxon
- riceOryza sativae0
- Treatment
- RI80 modee0
- Outcome
- GWPe0
- Direction
- decreasede0
- Value
- 45.2–61.4%e0
- Comparator
- CI modee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CI mode, RI80 mode decreased GWP and GHGI in double-cropping rice fields by 45.2–61.4% and 52.5–74.8%, respectively.”
Claim · model-written summary
RI80 decreased greenhouse gas emission intensity by 52.5–74.8% versus conventional irrigation.
- Taxon
- riceOryza sativae0
- Treatment
- RI80 modee0
- Outcome
- GHGIe0
- Direction
- decreasede0
- Value
- 52.5–74.8%e0
- Comparator
- CI modee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CI mode, RI80 mode decreased GWP and GHGI in double-cropping rice fields by 45.2–61.4% and 52.5–74.8%, respectively.”
Claim · model-written summary
The authors identified 80 cm ridge irrigation as optimal for raising rice yield and lowering methane emissions, GWP and GHGI.
- Taxon
- riceOryza sativae0
- Treatment
- RI with ridge width of 80 cme0
- Outcome
- optimal mode in increasing the yields of double-cropping rice and decreasing CH4 emission, GWP and GHGIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the RI with ridge width of 80 cm was the optimal mode in increasing the yields of double-cropping rice and decreasing CH4 emission, GWP and GHGI”
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See all 1,171 papers →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.