Abstract
Flooding is a major threat to agricultural production. Most studies have focused on the lower water storage limit in rice fields, whereas few studies have examined the upper water storage limit. This study aimed to explore the effect of waterlogging at the rice tillering stage on rice growth and yield. The early-ripening late japonica variety Yangjing 4227 was selected for this study. The treatments included different submergence depths (submergence depth/plant height: 1/2 (waist submergence), 2/3 (neck submergence), and 1/1 (complete submergence)) and durations (1, 3, and 5 d). The control group was treated with the conventional alternation of drying and wetting. The effects of waterlogging at the tillering stage on root characteristics, dry matter production, nitrogen and phosphorus accumulation, yield, yield components, and 1-aminocyclopropane-1-carboxylic acid synthase (ACS) gene expression were explored. Compared with the control group, the 1/1 group showed significant increases in yield, seed-setting rate, photosynthetically efficient leaf area, and OS-ACS3 gene expression after 1 d of submergence. The grain number per panicle, dry weight of the aboveground and belowground parts, and number of adventitious roots also increased. Correlation analysis revealed a significant positive correlation between the panicle number and nitrogen content; however, no significant correlation was found for phosphorus content. If a decrease in rice yield of less than 10% is acceptable, half, 2/3, and complete submergence of the plants can be performed at the tillering stage for 1-3 d; this treatment will increase the space available for rice field water management/control and will improve rainfall resource utilization.
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Claims 8
Claim · model-written summary
One day of complete submergence significantly increased rice yield and seed-setting rate versus conventional wetting and drying.
- Taxon
- rice
Oryza sativat0 - Treatment
- 1/1 groupe0
- Outcome
- yield, seed-setting ratee0
- Direction
- increasese0
- Qualifier
- after 1 d of submergencee0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the control group, the 1/1 group showed significant increases in yield, seed-setting rate, photosynthetically efficient leaf area, and OS-ACS3 gene expression after 1 d of submergence.”
t0“Rice”
Claim · model-written summary
One day of complete submergence significantly increased photosynthetically efficient leaf area.
- Taxon
- riceOryza sativat0
- Treatment
- 1/1 groupe0
- Outcome
- photosynthetically efficient leaf areae0
- Direction
- increasese0
- Qualifier
- after 1 d of submergencee0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the control group, the 1/1 group showed significant increases in yield, seed-setting rate, photosynthetically efficient leaf area, and OS-ACS3 gene expression after 1 d of submergence.”
t0“Rice”
Claim · model-written summary
One day of complete submergence significantly increased OS-ACS3 expression.
- Taxon
- riceOryza sativat0
- Treatment
- 1/1 groupe0
- Gene
- OS-ACS3e0
- Outcome
- OS-ACS3 gene expressione0
- Direction
- increasese0
- Qualifier
- after 1 d of submergencee0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the control group, the 1/1 group showed significant increases in yield, seed-setting rate, photosynthetically efficient leaf area, and OS-ACS3 gene expression after 1 d of submergence.”
t0“Rice”
Claim · model-written summary
Complete submergence also increased grains per panicle and dry weight of aboveground and belowground parts.
- Taxon
- riceOryza sativat0
- Treatment
- Complete Submergencet0
- Outcome
- grain number per panicle, dry weight of the aboveground and belowground partse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain number per panicle, dry weight of the aboveground and belowground parts, and number of adventitious roots also increased.”
t0“Complete Submergence of Rice”
Claim · model-written summary
Complete submergence increased adventitious root number.
- Taxon
- riceOryza sativat0
- Treatment
- Complete Submergencet0
- Outcome
- number of adventitious rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain number per panicle, dry weight of the aboveground and belowground parts, and number of adventitious roots also increased.”
t0“Complete Submergence of Rice”
Claim · model-written summary
Panicle number was significantly positively correlated with nitrogen content.
- Taxon
- riceOryza sativat0
- Compound
- nitrogen contente0
- Outcome
- panicle numbere0
- Direction
- positive correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlation analysis revealed a significant positive correlation between the panicle number and nitrogen content; however, no significant correlation was found for phosphorus content.”
t0“Rice”
Claim · model-written summary
Panicle number had no significant correlation with phosphorus content.
- Taxon
- riceOryza sativat0
- Compound
- phosphorus contente0
- Outcome
- panicle numbere0
- Direction
- no significant correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlation analysis revealed a significant positive correlation between the panicle number and nitrogen content; however, no significant correlation was found for phosphorus content.”
t0“Rice”
Claim · model-written summary
For an acceptable yield loss below 10%, half, two-thirds or complete submergence at tillering for 1–3 days can expand water-management space and improve rainfall use.
- Taxon
- riceOryza sativat0
- Outcome
- half, 2/3, and complete submergence of the plants can be performed at the tillering stage for 1-3 de0
- Qualifier
- a decrease in rice yield of less than 10% is acceptablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If a decrease in rice yield of less than 10% is acceptable, half, 2/3, and complete submergence of the plants can be performed at the tillering stage for 1-3 d; this treatment will increase the space available for rice field water management/control and will improve rainfall resource utilization.”
t0“Rice”
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