Abstract
Hybrid indica rice(Oryza sativa L.) cultivars play an important role in rice production system due to its heterosis,resistance to environmental stress,large panicle,and high yield potential.However,no attention has been given to its root growth dynamic responses to rising atmospheric CO2 concentration([CO2 ]) in conjunction with nitrogen(N) availability.Free air CO2 enrichment(FACE) and N have significant effects on rice root growth.In this experiment,a hybrid cultivar Shanyou 63(Oryza sativa L.) was used to study the effects of FACE and N levels on roots growth of rice.The results showed a significant increase in both adventitious root volume(ARV) and adventitious root dry weight(ARD) under the FACE treatment.The application of nitrogen also increased ARV and ARD,but the increase was smaller than that under FACE treatment.On the basis of the FACE experiment,numerical models for rice adventitious root volume and dry weight were built with the time as the driving factor.The models illustrated the dynamic development of rice adventitious root volume and dry weight after transplanting,regulated either by the influence factor of atmospheric [CO2 ] or by N application.The models were successfully used to predict ARV and ARD under FACE treatment in a different year with the predicted data being closely related to the actual experimental data.The model had guiding significance to growth regulation of rice root under the condition of atmospheric [CO2 ] rising in the future.
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Claims 4
Claim · model-written summary
FACE significantly increased adventitious root volume and dry weight.
- Taxon
- Oryza sativa L.
Oryza sativae0 - Material
- Shanyou 63e0
- Treatment
- FACE treatmente1
- Outcome
- adventitious root volume(ARV) and adventitious root dry weight(ARD)e1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shanyou 63(Oryza sativa L.) was used to study the effects of FACE and N levels on roots growth of rice”
e1“significant increase in both adventitious root volume(ARV) and adventitious root dry weight(ARD) under the FACE treatment”
Claim · model-written summary
Nitrogen application increased adventitious root volume and dry weight less than FACE did.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- Shanyou 63e0
- Treatment
- application of nitrogene1
- Outcome
- ARV and ARDe1
- Direction
- increasede1
- Comparator
- FACE treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shanyou 63(Oryza sativa L.)”
e1“The application of nitrogen also increased ARV and ARD,but the increase was smaller than that under FACE treatment”
Claim · model-written summary
The models depicted rice adventitious root volume and dry weight development after transplanting under CO2 or nitrogen influences.
- Taxon
- riceOryza sativae0
- Outcome
- dynamic development of rice adventitious root volume and dry weight after transplantinge0
- Qualifier
- atmospheric [CO2 ] or by N applicatione0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The models illustrated the dynamic development of rice adventitious root volume and dry weight after transplanting,regulated either by the influence factor of atmospheric [CO2 ] or by N application”
Claim · model-written summary
The models predicted root volume and dry weight under FACE in a different year, with predictions closely related to experimental data.
- Outcome
- predict ARV and ARDe0
- Direction
- closely relatede0
- Qualifier
- under FACE treatment in a different yeare0
- Comparator
- actual experimental datae0
Not reportedTaxon
Verbatim
e0“The models were successfully used to predict ARV and ARD under FACE treatment in a different year with the predicted data being closely related to the actual experimental data”
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