Abstract
Understanding the performance of rice (Oryza sativa L.) agronomic traits and efficiency in water usage as well as grain yield under various irrigation regimes is crucial to achieving high resource use efficiency and high yield. In this study, 12 mid-season indica rice genotypes that have been grown in the lower reaches of the Yangtze River for the past 80 years were studied in a field experiment for two years under two irrigation regimes, i.e., conventional irrigation (CI) and alternate wetting and drying irrigation (AWD). The results showed that with genotype improvement in irrigation regimes, the total number of spikelets, shoot and root dry weight, root oxidation activity, total leaf area index (LAI), effective LAI, leaf photosynthetic rate, and abscisic acid contents and zeatin + zeatin riboside contents in root bleeding sap were significantly increased at main growth stages. AWD irrigation synchronously increased rice resource use efficiency (water use efficiency (WUE), radiation use efficiency (RUE), and temperature use efficiency (TUE)) and grain yield. Compared to CI, AWD more significantly enhanced the performances of rice genotypes in all studied traits. Based on our findings, a semi-dwarf hybrid rice genotype has great potential for high resource use efficiency and high yield under alternate wetting and drying irrigation, which was attributed to the improved agronomic characteristics and superior root traits.
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Claims 14
Claim · model-written summary
With genotype improvement, total number of spikelets significantly increased at main growth stages.
- Taxon
- rice (Oryza sativa L.)
Oryza sativat0 - Material
- genotypee0
- Outcome
- total number of spikeletse0
- Direction
- increasede0
- Qualifier
- at main growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that with genotype improvement in irrigation regimes, the total number of spikelets, shoot and root dry weight, root oxidation activity, total leaf area index (LAI), effective LAI, leaf photosynthetic rate, and abscisic acid contents and zeatin + zeatin riboside contents in root bleeding sap were significantly increased at main growth stages.”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
With genotype improvement, shoot and root dry weight significantly increased at main growth stages.
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Material
- genotypee0
- Outcome
- shoot and root dry weighte0
- Direction
- increasede0
- Qualifier
- at main growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that with genotype improvement in irrigation regimes, the total number of spikelets, shoot and root dry weight, root oxidation activity, total leaf area index (LAI), effective LAI, leaf photosynthetic rate, and abscisic acid contents and zeatin + zeatin riboside contents in root bleeding sap were significantly increased at main growth stages.”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
With genotype improvement, root oxidation activity significantly increased at main growth stages.
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Material
- genotypee0
- Outcome
- root oxidation activitye0
- Direction
- increasede0
- Qualifier
- at main growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that with genotype improvement in irrigation regimes, the total number of spikelets, shoot and root dry weight, root oxidation activity, total leaf area index (LAI), effective LAI, leaf photosynthetic rate, and abscisic acid contents and zeatin + zeatin riboside contents in root bleeding sap were significantly increased at main growth stages.”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
With genotype improvement, total leaf area index (LAI), effective LAI significantly increased at main growth stages.
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Material
- genotypee0
- Outcome
- total leaf area index (LAI), effective LAIe0
- Direction
- increasede0
- Qualifier
- at main growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that with genotype improvement in irrigation regimes, the total number of spikelets, shoot and root dry weight, root oxidation activity, total leaf area index (LAI), effective LAI, leaf photosynthetic rate, and abscisic acid contents and zeatin + zeatin riboside contents in root bleeding sap were significantly increased at main growth stages.”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
With genotype improvement, leaf photosynthetic rate significantly increased at main growth stages.
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Material
- genotypee0
- Outcome
- leaf photosynthetic ratee0
- Direction
- increasede0
- Qualifier
- at main growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that with genotype improvement in irrigation regimes, the total number of spikelets, shoot and root dry weight, root oxidation activity, total leaf area index (LAI), effective LAI, leaf photosynthetic rate, and abscisic acid contents and zeatin + zeatin riboside contents in root bleeding sap were significantly increased at main growth stages.”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
With genotype improvement, abscisic acid contents significantly increased at main growth stages.
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Material
- genotypee0
- Outcome
- abscisic acid contentse0
- Direction
- increasede0
- Qualifier
- at main growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that with genotype improvement in irrigation regimes, the total number of spikelets, shoot and root dry weight, root oxidation activity, total leaf area index (LAI), effective LAI, leaf photosynthetic rate, and abscisic acid contents and zeatin + zeatin riboside contents in root bleeding sap were significantly increased at main growth stages.”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
With genotype improvement, zeatin + zeatin riboside contents in root bleeding sap significantly increased at main growth stages.
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Material
- genotypee0
- Outcome
- zeatin + zeatin riboside contents in root bleeding sape0
- Direction
- increasede0
- Qualifier
- at main growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that with genotype improvement in irrigation regimes, the total number of spikelets, shoot and root dry weight, root oxidation activity, total leaf area index (LAI), effective LAI, leaf photosynthetic rate, and abscisic acid contents and zeatin + zeatin riboside contents in root bleeding sap were significantly increased at main growth stages.”
t0“rice (Oryza sativa L.)”
Claim · model-written summary
AWD irrigation increased water use efficiency (WUE).
- Taxon
- riceOryza sativae0
- Treatment
- AWD irrigatione0
- Outcome
- water use efficiency (WUE)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AWD irrigation synchronously increased rice resource use efficiency (water use efficiency (WUE), radiation use efficiency (RUE), and temperature use efficiency (TUE)) and grain yield.”
Claim · model-written summary
AWD irrigation increased radiation use efficiency (RUE).
- Taxon
- riceOryza sativae0
- Treatment
- AWD irrigatione0
- Outcome
- radiation use efficiency (RUE)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AWD irrigation synchronously increased rice resource use efficiency (water use efficiency (WUE), radiation use efficiency (RUE), and temperature use efficiency (TUE)) and grain yield.”
Claim · model-written summary
AWD irrigation increased temperature use efficiency (TUE).
- Taxon
- riceOryza sativae0
- Treatment
- AWD irrigatione0
- Outcome
- temperature use efficiency (TUE)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AWD irrigation synchronously increased rice resource use efficiency (water use efficiency (WUE), radiation use efficiency (RUE), and temperature use efficiency (TUE)) and grain yield.”
Claim · model-written summary
AWD irrigation increased grain yield.
- Taxon
- riceOryza sativae0
- Treatment
- AWD irrigatione0
- Outcome
- grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AWD irrigation synchronously increased rice resource use efficiency (water use efficiency (WUE), radiation use efficiency (RUE), and temperature use efficiency (TUE)) and grain yield.”
Claim · model-written summary
Compared with CI, AWD enhanced the studied traits of rice genotypes.
- Taxon
- riceOryza sativae0
- Treatment
- AWDe0
- Outcome
- performances of rice genotypes in all studied traitse0
- Direction
- enhancede0
- Comparator
- CIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to CI, AWD more significantly enhanced the performances of rice genotypes in all studied traits.”
Claim · model-written summary
A semi-dwarf hybrid rice genotype has potential for high resource use efficiency and yield under alternate wetting and drying irrigation.
- Taxon
- riceOryza sativae0
- Material
- semi-dwarf hybrid rice genotypee0
- Treatment
- alternate wetting and drying irrigatione0
- Outcome
- high resource use efficiency and high yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Based on our findings, a semi-dwarf hybrid rice genotype has great potential for high resource use efficiency and high yield under alternate wetting and drying irrigation, which was attributed to the improved agronomic characteristics and superior root traits.”
Claim · model-written summary
The authors attributed the potential for high resource use efficiency and yield to improved agronomic characteristics and superior root traits.
- Taxon
- riceOryza sativae0
- Material
- semi-dwarf hybrid rice genotypee0
- Outcome
- high resource use efficiency and high yielde0
- Qualifier
- improved agronomic characteristics and superior root traitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Based on our findings, a semi-dwarf hybrid rice genotype has great potential for high resource use efficiency and high yield under alternate wetting and drying irrigation, which was attributed to the improved agronomic characteristics and superior root traits.”
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