Abstract
Abstract We examined the effect of seed nitrogen content on the rates of germination, emergence, and establishment of rice plants. Several seed lots with various nitrogen contents were obtained from the parent plants grown under 3 planting densities and 4 rates of nitrogen application. There was a clear negative correlation between the seed nitrogen content and germination time (R =0.88), whereas the correlation between the seed dry weight and germination time was very low (R=0.23). The seed lot with a high nitrogen content absorbed water faster than the seed lot with a low nitrogen content, especially on the first day after soaking, and also showed a faster emergence, exsertion of the fourth leave, and a more uniform germination. Moreover, the increase of seed nitrogen content as well as the prolongation of soaking time resulted in a uniform emergence. Therefore, seed vigor is likely to be enhanced by the increase of seed nitrogen content, which may be achieved by an adequate application of a large amount of nitrogen to parent plants. Consequently, it may be possible to improve and stabilize the establishment of directly sown rice plants by the sowing of vigorous seeds with a high nitrogen content.
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Claims 11
Claim · model-written summary
Rice seed nitrogen content was negatively correlated with germination time (R =0.88).
- Taxon
- rice plants
Oryza sativat0 - Organ / stage
- seede0
- Compound
- nitrogene0
- Outcome
- germination timee0
- Direction
- negative correlatione0
- Value
- R =0.88e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a clear negative correlation between the seed nitrogen content and germination time (R =0.88)”
t0“rice plants”
Claim · model-written summary
Rice seed dry weight had a very low correlation with germination time (R=0.23).
- Taxon
- rice plantsOryza sativat0
- Organ / stage
- seede0
- Outcome
- germination timee0
- Direction
- very lowe0
- Value
- R=0.23e0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the correlation between the seed dry weight and germination time was very low (R=0.23)”
t0“rice plants”
Claim · model-written summary
High-nitrogen rice seeds absorbed water faster than low-nitrogen seeds, particularly on the first day after soaking.
- Taxon
- rice plantsOryza sativat0
- Treatment
- high nitrogen contente0
- Outcome
- absorbed watere0
- Direction
- fastere0
- Qualifier
- especially on the first day after soakinge0
- Comparator
- low nitrogen contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed lot with a high nitrogen content absorbed water faster than the seed lot with a low nitrogen content, especially on the first day after soaking”
t0“rice plants”
Claim · model-written summary
High-nitrogen rice seeds emerged faster than low-nitrogen seeds.
- Taxon
- rice plantsOryza sativat0
- Treatment
- high nitrogen contente0
- Outcome
- emergencee0
- Direction
- fastere0
- Comparator
- low nitrogen contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed lot with a high nitrogen content absorbed water faster than the seed lot with a low nitrogen content, especially on the first day after soaking, and also showed a faster emergence”
t0“rice plants”
Claim · model-written summary
High-nitrogen rice seeds showed faster fourth-leaf exsertion than low-nitrogen seeds.
- Taxon
- rice plantsOryza sativat0
- Treatment
- high nitrogen contente0
- Outcome
- exsertion of the fourth leavee0
- Comparator
- low nitrogen contente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed lot with a high nitrogen content absorbed water faster than the seed lot with a low nitrogen content, especially on the first day after soaking, and also showed a faster emergence, exsertion of the fourth leave”
t0“rice plants”
Claim · model-written summary
High-nitrogen rice seeds germinated more uniformly than low-nitrogen seeds.
- Taxon
- rice plantsOryza sativat0
- Treatment
- high nitrogen contente0
- Outcome
- germinatione0
- Direction
- more uniforme0
- Comparator
- low nitrogen contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed lot with a high nitrogen content absorbed water faster than the seed lot with a low nitrogen content, especially on the first day after soaking, and also showed a faster emergence, exsertion of the fourth leave, and a more uniform germination”
t0“rice plants”
Claim · model-written summary
Increasing rice seed nitrogen content made emergence more uniform.
- Taxon
- rice plantsOryza sativat0
- Treatment
- increase of seed nitrogen contente0
- Outcome
- emergencee0
- Direction
- uniforme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase of seed nitrogen content as well as the prolongation of soaking time resulted in a uniform emergence”
t0“rice plants”
Claim · model-written summary
Prolonging rice seed soaking time made emergence more uniform.
- Taxon
- rice plantsOryza sativat0
- Treatment
- prolongation of soaking timee0
- Outcome
- emergencee0
- Direction
- uniforme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase of seed nitrogen content as well as the prolongation of soaking time resulted in a uniform emergence”
t0“rice plants”
Claim · model-written summary
The authors infer that increased rice seed nitrogen content is likely to enhance seed vigor.
- Taxon
- rice plantsOryza sativat0
- Compound
- nitrogene0
- Outcome
- seed vigore0
- Qualifier
- likelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed vigor is likely to be enhanced by the increase of seed nitrogen content”
t0“rice plants”
Claim · model-written summary
The authors propose applying a large amount of nitrogen to parent plants to produce vigorous seeds.
- Taxon
- rice plantsOryza sativat0
- Treatment
- an adequate application of a large amount of nitrogen to parent plantse0
- Outcome
- seed vigore1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which may be achieved by an adequate application of a large amount of nitrogen to parent plants”
e1“seed vigor is likely to be enhanced by the increase of seed nitrogen content”
t0“rice plants”
Claim · model-written summary
The authors suggest sowing vigorous high-nitrogen rice seeds to improve and stabilize direct-sown establishment.
- Taxon
- rice plantsOryza sativae0
- Treatment
- sowing of vigorous seeds with a high nitrogen contente0
- Outcome
- establishment of directly sown rice plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it may be possible to improve and stabilize the establishment of directly sown rice plants by the sowing of vigorous seeds with a high nitrogen content”
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See all 511 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.