Abstract
Midsouthern US producers are reluctant to adopt alternate rice (Oryza sativa L.) irrigation techniques that could reduce groundwater withdrawal due to perceived reduction in nitrogen use efficiency (NUE) and rice grain yield. The objective of this study was to determine the impact of four rice irrigation techniques (continuous flood, straighthead irrigation, alternate wet/dry, and aerobic) on maturity, mature plant height, NUE, and rice grain yield for six cultivars commonly grown in Louisiana and Mississippi. This experiment was conducted in 2013 and 2014 at Louisiana State University (LSU) AgCenter in Crowley, Louisiana, on a Crowley silt loam (fine, smectitic, thermic Typic Albaqualfs) and at Delta Research and Extension Center in Stoneville, Mississippi, on a Sharkey clay (veryfine, smectitic, thermic Chromic Epiaquerts). Nitrogen use efficiency and rice grain yield for rice grown in an aerobic environment was reduced at least 20% compared to continuous flood, straighthead-drain management, and alternate wetting and drying (AWD) irrigation. Straighthead irrigation and AWD performed similar to the continuously flooded production system for NUE and rice grain yield. These data indicate that when properly managed use of an alternate irrigation strategy, such as AWD irrigation, does not reduce NUE, plant height, or grain yield compared to a continuously flooded system.
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Claims 5
Claim · model-written summary
Aerobic irrigation reduced rice nitrogen use efficiency by at least 20% versus three flooded or alternating strategies.
- Taxon
- rice
Oryza sativae0 - Treatment
- aerobic environmente0
- Outcome
- Nitrogen use efficiencye0
- Direction
- reducede0
- Value
- at least 20%e0
- Comparator
- continuous flood, straighthead-drain management, and alternate wetting and drying (AWD) irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen use efficiency and rice grain yield for rice grown in an aerobic environment was reduced at least 20% compared to continuous flood, straighthead-drain management, and alternate wetting and drying (AWD) irrigation”
Claim · model-written summary
Aerobic irrigation reduced rice grain yield by at least 20% versus three flooded or alternating strategies.
- Taxon
- riceOryza sativae0
- Treatment
- aerobic environmente0
- Outcome
- rice grain yielde0
- Direction
- reducede0
- Value
- at least 20%e0
- Comparator
- continuous flood, straighthead-drain management, and alternate wetting and drying (AWD) irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen use efficiency and rice grain yield for rice grown in an aerobic environment was reduced at least 20% compared to continuous flood, straighthead-drain management, and alternate wetting and drying (AWD) irrigation”
Claim · model-written summary
Straighthead irrigation had similar nitrogen use efficiency and grain yield to continuous flooding.
- Taxon
- riceOryza sativat0
- Treatment
- Straighthead irrigatione0
- Outcome
- NUE and rice grain yielde0
- Direction
- similare0
- Comparator
- continuously flooded production systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Straighthead irrigation and AWD performed similar to the continuously flooded production system for NUE and rice grain yield”
t0“rice grain yield”
Claim · model-written summary
AWD had similar nitrogen use efficiency and grain yield to continuous flooding.
- Taxon
- riceOryza sativat0
- Treatment
- AWDe0
- Outcome
- NUE and rice grain yielde0
- Direction
- similare0
- Comparator
- continuously flooded production systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Straighthead irrigation and AWD performed similar to the continuously flooded production system for NUE and rice grain yield”
t0“rice grain yield”
Claim · model-written summary
Properly managed alternate irrigation such as AWD did not reduce plant height relative to continuous flooding.
- Taxon
- riceOryza sativat0
- Treatment
- AWD irrigatione0
- Outcome
- plant heighte0
- Direction
- does not reducee0
- Qualifier
- when properly managede0
- Comparator
- a continuously flooded systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when properly managed use of an alternate irrigation strategy, such as AWD irrigation, does not reduce NUE, plant height, or grain yield compared to a continuously flooded system”
t0“rice grain yield”
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