Abstract
Abstract Of the various factors affecting nitrogen response in rice, plant form or plant type is particularly significant. Experiments were conducted during two crop seasons to study the N response and the growth characteristics of some traditional leafy tropical indica varieties and two dwarf indicas of improved plant type. Most of the traditional tall varieties lodged at certain growth stages, and yielded the best when 30 to 60 kg/ha N was applied. One of the dwarf varieties developed by the Institute produced progressively higher yields (the highest being 9,477 kg/ha) up to 120 kg/ha N in the sunny dry season. The increase in dry matter production from panicle initiation to harvest was significantly correlated with grain yield. During the cloudy wet season when the grain yield response to fertilizer N is lower than during the dry season, the dwarf indica variety, IR8, produced 3,480 kg/ha more rough rice than the tall, weak‐strawed variety, Peta, indicating the importance of short stature and culm strength in obtaining high yields.
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Claims 6
Claim · model-written summary
Most traditional tall rice varieties lodged at certain growth stages.
- Taxon
- Indica Rice
Oryza sativa Indica Groupt0 - Material
- traditional tall varietiese0
- Outcome
- lodged at certain growth stagese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Indica Rice”
e0“Most of the traditional tall varieties lodged at certain growth stages”
Claim · model-written summary
Traditional tall rice varieties yielded best at 30 to 60 kg/ha N.
- Taxon
- Indica RiceOryza sativa Indica Groupt0
- Treatment
- 30 to 60 kg/ha Ne0
- Outcome
- yielded the beste0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Indica Rice”
e0“yielded the best when 30 to 60 kg/ha N was applied”
Claim · model-written summary
One dwarf variety had progressively higher yields up to 120 kg/ha N, peaking at 9,477 kg/ha in the sunny dry season.
- Taxon
- Indica RiceOryza sativa Indica Groupt0
- Material
- One of the dwarf varietiese0
- Treatment
- 120 kg/ha Ne0
- Outcome
- yieldse0
- Direction
- highere0
- Value
- 9,477 kg/hae0
- Qualifier
- sunny dry seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Indica Rice”
e0“One of the dwarf varieties developed by the Institute produced progressively higher yields (the highest being 9,477 kg/ha) up to 120 kg/ha N in the sunny dry season”
Claim · model-written summary
Dry matter production from panicle initiation to harvest was significantly correlated with grain yield.
- Taxon
- Indica RiceOryza sativa Indica Groupt0
- Outcome
- grain yielde0
- Comparator
- dry matter productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Indica Rice”
e0“The increase in dry matter production from panicle initiation to harvest was significantly correlated with grain yield”
Claim · model-written summary
Fertilizer nitrogen gave a lower grain yield response in the cloudy wet season than in the dry season.
- Taxon
- Indica RiceOryza sativa Indica Groupt0
- Treatment
- fertilizer Ne0
- Outcome
- grain yield responsee0
- Direction
- lowere0
- Comparator
- the dry seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Indica Rice”
e0“During the cloudy wet season when the grain yield response to fertilizer N is lower than during the dry season”
Claim · model-written summary
IR8 produced 3,480 kg/ha more rough rice than Peta during the cloudy wet season.
- Taxon
- Indica RiceOryza sativa Indica Groupt0
- Material
- IR8e0
- Outcome
- rough ricee0
- Direction
- moree0
- Value
- 3,480 kg/hae0
- Comparator
- Petae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Indica Rice”
e0“the dwarf indica variety, IR8, produced 3,480 kg/ha more rough rice than the tall, weak‐strawed variety, Peta”
The same questions in other papers
nitrogen · yield · Oryza sativa (rice)Positive and negative results
1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
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- negative
- negative
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