Abstract
ABSTRACT Water and nitrogen management is essential to achieve high yield potential in irrigated agricultural systems. This study aimed to evaluate the influence of flood timing and nitrogen management on the agronomic performance of irrigated rice in tropical lowland. Two experiments were conducted in a Dystrophic Haplic Gleysol during the 2007/08 and 2008/09 crop years. The experiments were carried out using the cultivars BRS Jaçanã and Epagri 109. Flood timing combined with timing of topdressing 90 kg ha -1 N was evaluated at 15, 30, 45 and 60 days after emergence. The experiment was arranged in a split plot completely randomized design, flood timing in the plots and N application in the subplots, with six replications. Late flooding as well as late nitrogen application resulted in reduction of phytobiomass, grain quality and yield of irrigated rice. Flooding is recommended at the beginning of tillering for cultivar that shows higher initial growth, while for slower growth cultivar, ponding water can be established until mid-tillering. Early flooding increases sheath blight severity in rice stems. For improved quality and productive potential of irrigated rice, early flooding period and efficient sheath blight control is necessary.
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Claims 6
Claim · model-written summary
Late flooding reduced rice phytobiomass, quality and yield.
- Taxon
- irrigated rice
Oryza sativae0 - Treatment
- Late floodinge0
- Outcome
- phytobiomass, grain quality and yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late flooding as well as late nitrogen application resulted in reduction of phytobiomass, grain quality and yield of irrigated rice.”
Claim · model-written summary
Late nitrogen application reduced rice phytobiomass, quality and yield.
- Taxon
- irrigated riceOryza sativae0
- Treatment
- late nitrogen applicatione0
- Outcome
- phytobiomass, grain quality and yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late flooding as well as late nitrogen application resulted in reduction of phytobiomass, grain quality and yield of irrigated rice.”
Claim · model-written summary
Early flooding increased rice stem sheath blight severity.
- Taxon
- riceOryza sativae0
- Organ / stage
- stemse0
- Treatment
- Early floodinge0
- Outcome
- sheath blight severitye0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Early flooding increases sheath blight severity in rice stems.”
Claim · model-written summary
Early flooding at the start of tillering is recommended for faster initial growth cultivars.
- Taxon
- riceOryza sativat0
- Outcome
- Flooding is recommended at the beginning of tilleringe0
- Qualifier
- cultivar that shows higher initial growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Flooding is recommended at the beginning of tillering for cultivar that shows higher initial growth”
Claim · model-written summary
Flooding until mid-tillering is recommended for slower growth cultivars.
- Taxon
- riceOryza sativat0
- Outcome
- ponding water can be established until mid-tilleringe0
- Qualifier
- slower growth cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“for slower growth cultivar, ponding water can be established until mid-tillering.”
Claim · model-written summary
The authors recommend early flooding with effective sheath blight control for better rice quality and production.
- Taxon
- irrigated riceOryza sativae0
- Outcome
- early flooding period and efficient sheath blight controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For improved quality and productive potential of irrigated rice, early flooding period and efficient sheath blight control is necessary.”
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