Abstract
The continuing increase in atmospheric carbon dioxide concentration ([CO2]) and projections of possible future increases in globalair temperatures have stimulated interest in the effects of these climate variables on agriculturally important food crops. Thisstudy was conducted to determine the effects of [CO2] and temperature on rice (Oryza sativa L., cv. IR–30). Rice plants weregrown season-long in outdoor, naturally sunlit, controlled-environment, plant growth chambers in temperature regimes ranging from 25/18/21°C to 37/30/34°C (daytime dry bulb air temperature/night-time dry bulb air temperature/paddy water temperature)and [CO2] of 660 μmol CO2 mol1 air. An ambient chamber was maintained at a [CO2] of 330 μmol mol–1 and temperature regimes of 28/21/25°C. Carbon dioxide enrichment at 28/21/25°C increased both biomass accumulation and tillering and increased grain yield by 60%. In the 660 μmol mol–1 [CO2] treatment, grain yield decreased from 10.4 to 1.0 Mg ha−1 with increasing temperature from 28/21/25°C to the 37/30/34°C temperature treatment. Across this temperature range, the number of panicles plant–1 nearly doubled while the number of seeds panicle–1 declined sharply. These results indicate that while future increases in atmospheric [CO2] are likely to be beneficial to rice growth and yield, potentially large negative effects on rice yield are possible if air temperatures also rise.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Carbon dioxide enrichment increased rice biomass accumulation and tillering at 28/21/25°C.
- Taxon
- Rice
Oryza sativat0 - Treatment
- Carbon dioxide enrichmente0
- Outcome
- biomass accumulation and tilleringe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide enrichment at 28/21/25°C increased both biomass accumulation and tillering”
t0“Rice”
Claim · model-written summary
Carbon dioxide enrichment increased rice grain yield by 60% at 28/21/25°C.
- Taxon
- RiceOryza sativat0
- Treatment
- Carbon dioxide enrichmente0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carbon dioxide enrichment at 28/21/25°C increased both biomass accumulation and tillering and increased grain yield by 60%”
t0“Rice”
Claim · model-written summary
Under elevated carbon dioxide, rice grain yield decreased from 10.4 to 1.0 Mg ha−1 as temperature increased.
- Taxon
- RiceOryza sativat0
- Treatment
- increasing temperature from 28/21/25°C to the 37/30/34°C temperature treatmente0
- Outcome
- grain yielde0
- Direction
- decreasede0
- Value
- 10.4 to 1.0 Mg ha−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the 660 μmol mol–1 [CO2] treatment, grain yield decreased from 10.4 to 1.0 Mg ha−1 with increasing temperature from 28/21/25°C to the 37/30/34°C temperature treatment”
t0“Rice”
Claim · model-written summary
Across the temperature range, rice panicles per plant nearly doubled.
- Taxon
- RiceOryza sativat0
- Treatment
- temperature rangee0
- Outcome
- number of panicles plant–1e0
- Direction
- nearly doublede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Across this temperature range, the number of panicles plant–1 nearly doubled”
t0“Rice”
Claim · model-written summary
Across the temperature range, rice seeds per panicle declined sharply.
- Taxon
- RiceOryza sativat0
- Treatment
- temperature rangee0
- Outcome
- number of seeds panicle–1e0
- Direction
- declined sharplye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Across this temperature range, the number of panicles plant–1 nearly doubled while the number of seeds panicle–1 declined sharply”
t0“Rice”
The same questions in other papers
co2 · growth · Oryza sativa (rice)Positive and negative results
99 papers in the same direction as this paper · 23 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- positive
120 papers more in this group
See all 124 papers →co2 · yield · Oryza sativa (rice)Positive and negative results
130 papers in the same direction as this paper · 28 in the opposite direction
- negative
- negative
- no effect
155 papers more in this group
See all 159 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.