Abstract
To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba. Although high nitrogen application (HN) increased the top dry weight at the full heading stage only slightly, it increased the sink size (single grain weight x the number of spikelets per area), leaf area index and nitrogen content at the full heading stage and accordingly the dry matter production during the ripening period. As a result, the gross hulled rice yield was higher under HN than under standard nitrogen application (SN). Under HN, early topdressing increased not only the number of differentiated spikelets but also the number of degenerated spikelets. As a result, the sink size and gross hulled rice yield of the plants were not changed by the early topdressing. Under HN, the higher planting density increased the number of panicles per area but decreased the number of spikelets per panicle. As a result, the sink size and gross hulled rice yield were not changed with the planting density. In conclusion, HN produced the gross hulled rice yield of more than 9 t ha-1. However, the gross hulled rice yield could not be increased more than 10 t ha-1 by regulation of the timing of topdressing and /or the planting density. We discussed the strategies for super high-yielding rice in the Tohoku region.
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Claims 13
Claim · model-written summary
High nitrogen application increased top dry weight at full heading only slightly compared with standard nitrogen in rice.
- Taxon
- rice
Oryza sativae0 - Material
- Bekoaobae0
- Organ / stage
- full heading stagee1
- Treatment
- high nitrogen application (HN)e1
- Outcome
- top dry weight at the full heading stagee1
- Direction
- increasede1
- Qualifier
- only slightlye1
- Comparator
- standard nitrogen application (SN)e2
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“Although high nitrogen application (HN) increased the top dry weight at the full heading stage only slightly, it increased the sink size (single grain weight x the number of spikelets per area), leaf area index and nitrogen content at the full heading stage and accordingly the dry matter production during the ripening period”
e2“the gross hulled rice yield was higher under HN than under standard nitrogen application (SN)”
Claim · model-written summary
High nitrogen application increased sink size of rice compared with standard nitrogen.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Organ / stage
- full heading stagee1
- Treatment
- high nitrogen application (HN)e1
- Outcome
- sink sizee1
- Direction
- increasede1
- Comparator
- standard nitrogen application (SN)e2
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“Although high nitrogen application (HN) increased the top dry weight at the full heading stage only slightly, it increased the sink size (single grain weight x the number of spikelets per area), leaf area index and nitrogen content at the full heading stage and accordingly the dry matter production during the ripening period”
e2“the gross hulled rice yield was higher under HN than under standard nitrogen application (SN)”
Claim · model-written summary
High nitrogen application increased leaf area index and nitrogen content of rice at full heading compared with standard nitrogen.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Organ / stage
- full heading stagee1
- Treatment
- high nitrogen application (HN)e1
- Outcome
- leaf area index and nitrogen contente1
- Direction
- increasede1
- Comparator
- standard nitrogen application (SN)e2
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“Although high nitrogen application (HN) increased the top dry weight at the full heading stage only slightly, it increased the sink size (single grain weight x the number of spikelets per area), leaf area index and nitrogen content at the full heading stage and accordingly the dry matter production during the ripening period”
e2“the gross hulled rice yield was higher under HN than under standard nitrogen application (SN)”
Claim · model-written summary
High nitrogen application increased dry matter production during the ripening period of rice compared with standard nitrogen.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Treatment
- high nitrogen application (HN)e1
- Outcome
- dry matter production during the ripening periode1
- Direction
- increasede1
- Comparator
- standard nitrogen application (SN)e2
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“Although high nitrogen application (HN) increased the top dry weight at the full heading stage only slightly, it increased the sink size (single grain weight x the number of spikelets per area), leaf area index and nitrogen content at the full heading stage and accordingly the dry matter production during the ripening period”
e2“the gross hulled rice yield was higher under HN than under standard nitrogen application (SN)”
Claim · model-written summary
Gross hulled rice yield was higher under high nitrogen application than under standard nitrogen application.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Treatment
- HNe1
- Outcome
- gross hulled rice yielde1
- Direction
- highere1
- Comparator
- standard nitrogen application (SN)e1
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“the gross hulled rice yield was higher under HN than under standard nitrogen application (SN)”
Claim · model-written summary
Under high nitrogen, early topdressing increased the number of differentiated spikelets of rice.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Treatment
- early topdressinge1
- Outcome
- number of differentiated spikeletse1
- Direction
- increasede1
- Qualifier
- Under HNe1
- Setting
- field experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“Under HN, early topdressing increased not only the number of differentiated spikelets but also the number of degenerated spikelets”
Claim · model-written summary
Under high nitrogen, early topdressing increased the number of degenerated spikelets of rice.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Treatment
- early topdressinge1
- Outcome
- number of degenerated spikeletse1
- Direction
- increasede1
- Qualifier
- Under HNe1
- Setting
- field experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“Under HN, early topdressing increased not only the number of differentiated spikelets but also the number of degenerated spikelets”
Claim · model-written summary
Early topdressing did not change sink size or gross hulled rice yield.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Treatment
- early topdressinge1
- Outcome
- sink size and gross hulled rice yielde1
- Direction
- not changede1
- Setting
- field experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“the sink size and gross hulled rice yield of the plants were not changed by the early topdressing”
Claim · model-written summary
Under high nitrogen, higher planting density increased the number of panicles per area of rice.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Treatment
- higher planting densitye1
- Outcome
- number of panicles per areae1
- Direction
- increasede1
- Qualifier
- Under HNe1
- Setting
- field experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“Under HN, the higher planting density increased the number of panicles per area but decreased the number of spikelets per panicle”
Claim · model-written summary
Under high nitrogen, higher planting density decreased the number of spikelets per panicle of rice.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Treatment
- higher planting densitye1
- Outcome
- number of spikelets per paniclee1
- Direction
- decreasede1
- Qualifier
- Under HNe1
- Setting
- field experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“Under HN, the higher planting density increased the number of panicles per area but decreased the number of spikelets per panicle”
Claim · model-written summary
Planting density did not change sink size or gross hulled rice yield.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Treatment
- planting densitye1
- Outcome
- sink size and gross hulled rice yielde1
- Direction
- not changede1
- Setting
- field experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“the sink size and gross hulled rice yield were not changed with the planting density”
Claim · model-written summary
High nitrogen application produced gross hulled rice yield of more than 9 t/ha.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Treatment
- HNe1
- Outcome
- gross hulled rice yielde1
- Value
- more than 9 t ha-1e1
- Setting
- field experimente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“HN produced the gross hulled rice yield of more than 9 t ha-1”
Claim · model-written summary
Gross hulled rice yield could not be raised above 10 t/ha by changing topdressing timing or planting density.
- Taxon
- riceOryza sativae0
- Material
- Bekoaobae0
- Treatment
- regulation of the timing of topdressing and /or the planting densitye1
- Outcome
- gross hulled rice yielde1
- Direction
- could not be increasede1
- Value
- more than 10 t ha-1e1
- Setting
- field experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve super high yield of more than 10 t ha-1 in the Tohoku region (colder area of Japan), we conducted a two-year field experiment using a large grain type high-yielding rice variety Bekoaoba”
e1“the gross hulled rice yield could not be increased more than 10 t ha-1 by regulation of the timing of topdressing and /or the planting density”
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