Claim · model-written summary
Ozone reduced rice biomass by 25% relative to charcoal-filtered air at ambient CO2.
- Taxon
- rice
Oryza sativae0 - Treatment
- O 3e1
- Outcome
- biomasse1
- Direction
- reducede1
- Value
- 25%e1
- Qualifier
- in Ae1
- Comparator
- CFe0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We grew rice ( Oryza sativa L.) at five densities in CF”
e1“O 3 reduced biomass by 25% and seed yield by 13–20% in A, but had little effect in +CO2”
Title
Ozone and density affect the response of biomass and seed yield to elevated CO2 in rice
CHANTAL D. REID; EDWIN L. FISCUS Global Change Biology 2007. doi:10.1111/j.1365-2486.2007.01472.x
Other claims from this paper (14)
- Intervention effect Ozone reduced rice seed yield by 13-20% relative to charcoal-filtered air at ambient CO2.
- Intervention effect Ozone had little effect on rice biomass and seed yield under elevated CO2.
- Intervention effect In ambient CO2, a smaller share of resources was used for biomass under ozone than in charcoal-filtered air (average 53% vs. 70%).
- Observation Under elevated CO2, 85% of resources were used for biomass regardless of ozone.
- Intervention effect The CO2 enhancement ratio of biomass was 22% greater in ozone-fumigated air than in charcoal-filtered air.
- Observation For seed yield, few resources were used (average 17% for charcoal-filtered air in 1997 and 25% in 1998).
- Intervention effect The seed yield CO2 enhancement ratio was 13% greater in ozone-fumigated air than in charcoal-filtered air.
- Intervention effect The rate of change of individual plant biomass with density was not affected by elevated CO2 in charcoal-filtered air in 1997.
- Intervention effect The rate of change of individual plant biomass with density was increased 19% by elevated CO2 in charcoal-filtered air in 1998, with more nutrients.
- Intervention effect The rate of change of individual plant yield with density was reduced by CO2 in 1997.
- Intervention effect The rate of change of individual plant yield with density was unchanged by CO2 in 1998.
- Mechanism Resource limitation is asserted to preclude the CO2 fertilization impact in rice.
- Recommendation Increased density and soil fertility might compensate for ozone (pollutant) damage in rice.
- Recommendation Both ozone and CO2 need consideration for better management and forecasts of future rice productivity.