Abstract
A pot experiment was conducted to study the differences in rice plant biomass,N accumulation,N use efficiency,glutamine synthetase activity (GSA) and nitrate reductase activity (NRA) of paddy soil derived from red soil under different fertility levels at 40,50 and 60 days after sowing. The results showed that the fresh and dry weights of rice plant under high fertility condition were significantly higher than those under low fertility condition,especially for the root biomass. High soil fertility increased rice root numbers significantly,but showed no significant effect on the root/shoot ratio. The rice N accumulation,NRA and GSA were significantly improved under high fertility soil conditions,which showed that high soil fertility increased rice N accumulation and assimilation significantly. High soil fertility increased the rice N use efficiencies but resulted in no statistically significant difference. In summary,appropriate amelioration for the paddy soil fertility was of important strategic significance for rice growth and nitrogen nutrition in tropical and subtropical China.
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Claims 7
Claim · model-written summary
High fertility significantly increased fresh and dry weights.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- roote0
- Treatment
- high fertility conditione0
- Outcome
- fresh and dry weightse0
- Direction
- highere0
- Comparator
- low fertility conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that the fresh and dry weights of rice plant under high fertility condition were significantly higher than those under low fertility condition,especially for the root biomass”
Claim · model-written summary
High fertility significantly increased rice root numbers.
- Taxon
- riceOryza sativae0
- Treatment
- High soil fertilitye0
- Outcome
- root numberse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High soil fertility increased rice root numbers significantly”
Claim · model-written summary
High fertility had no significant effect on root/shoot ratio.
- Taxon
- riceOryza sativae0
- Treatment
- High soil fertilitye0
- Outcome
- root/shoot ratioe0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High soil fertility increased rice root numbers significantly,but showed no significant effect on the root/shoot ratio”
Claim · model-written summary
High fertility significantly improved rice nitrogen accumulation.
- Taxon
- riceOryza sativae0
- Treatment
- high fertility soil conditionse0
- Outcome
- N accumulatione0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rice N accumulation,NRA and GSA were significantly improved under high fertility soil conditions”
Claim · model-written summary
High fertility significantly improved rice NRA.
- Taxon
- riceOryza sativae0
- Treatment
- high fertility soil conditionse0
- Outcome
- NRAe0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rice N accumulation,NRA and GSA were significantly improved under high fertility soil conditions”
Claim · model-written summary
High fertility significantly improved rice GSA.
- Taxon
- riceOryza sativae0
- Treatment
- high fertility soil conditionse0
- Outcome
- GSAe0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rice N accumulation,NRA and GSA were significantly improved under high fertility soil conditions”
Claim · model-written summary
High fertility increased rice nitrogen use efficiency without a statistically significant difference.
- Taxon
- riceOryza sativae0
- Treatment
- High soil fertilitye0
- Outcome
- N use efficienciese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High soil fertility increased the rice N use efficiencies but resulted in no statistically significant difference”
The same questions in other papers
soil · growth · Oryza sativa (rice)Positive and negative results
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2 papers in the same direction as this paper · 3 in the opposite direction
- no effect
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See all 6 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.