Abstract
The effects of nitrogen(N) application rate and planting density on population quality and culm lodging resistance of rice were investigated with hybrid rice combination Ⅱyou 498 as material under triangle-planted system of rice intensification(TSRI),and correlation of population quality with culm lodging resistance and grain yield was analyzed.There was an obvious regulatory effect of N application rate and planting density on grain yield,population quality,and lodging resistance of rice culm under TSRI.Compared with other treatments,150 kg/hm2 N application rate coupled with the suitable planting density(40 cm × 40 cm) improved leaf area index(LAI) and light transmission rate in rice population,coordinated bending moment and breaking resistance of basal internodes,alleviated contradiction of panicle and grain,and increased grain yield.At the nitrogen application rate of 225 kg/hm2,planting density should be reduced to alleviate deterioration of population quality index and decreased lodging index.The suitable planting density was 50 cm × 50 cm. Correlation analysis indicated population quality was significantly correlated with internode lodging resistance and yield.Middle part light transmission rate in rice population at full heading and 30 days after full heading,and amount of sap flow of rice root at 30 days after full heading might be indicators for grain yield and culm lodging resistance.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher.
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Nitrogen rate and planting density regulated rice yield, population quality and lodging resistance.
- Taxon
- rice
Oryza sativae0 - Treatment
- N application rate and planting densitye0
- Outcome
- grain yield,population quality,and lodging resistancee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was an obvious regulatory effect of N application rate and planting density on grain yield,population quality,and lodging resistance of rice culm under TSRI”
Claim · model-written summary
The 150 kg/hm2 N and 40 cm × 40 cm density improved rice leaf area index and light transmission relative to other treatments.
- Taxon
- riceOryza sativae0
- Treatment
- 150 kg/hm2 N application rate coupled with the suitable planting density(40 cm × 40 cm)e0
- Outcome
- leaf area index(LAI) and light transmission ratee0
- Direction
- improvede0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with other treatments,150 kg/hm2 N application rate coupled with the suitable planting density(40 cm × 40 cm) improved leaf area index(LAI) and light transmission rate in rice population”
Claim · model-written summary
The same nitrogen and density combination coordinated basal internode bending moment and breaking resistance.
- Taxon
- riceOryza sativae0
- Treatment
- 150 kg/hm2 N application rate coupled with the suitable planting density(40 cm × 40 cm)e0
- Outcome
- bending moment and breaking resistance of basal internodese0
- Direction
- coordinatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“150 kg/hm2 N application rate coupled with the suitable planting density(40 cm × 40 cm) improved leaf area index(LAI) and light transmission rate in rice population,coordinated bending moment and breaking resistance of basal internodes”
Claim · model-written summary
The same combination alleviated the panicle and grain contradiction.
- Taxon
- riceOryza sativae0
- Treatment
- 150 kg/hm2 N application rate coupled with the suitable planting density(40 cm × 40 cm)e0
- Outcome
- contradiction of panicle and graine0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“150 kg/hm2 N application rate coupled with the suitable planting density(40 cm × 40 cm) improved leaf area index(LAI) and light transmission rate in rice population,coordinated bending moment and breaking resistance of basal internodes,alleviated contradiction of panicle and grain”
Claim · model-written summary
The same combination increased rice grain yield.
- Taxon
- riceOryza sativae0
- Treatment
- 150 kg/hm2 N application rate coupled with the suitable planting density(40 cm × 40 cm)e0
- Outcome
- grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“150 kg/hm2 N application rate coupled with the suitable planting density(40 cm × 40 cm) improved leaf area index(LAI) and light transmission rate in rice population,coordinated bending moment and breaking resistance of basal internodes,alleviated contradiction of panicle and grain,and increased grain yield”
Claim · model-written summary
At 225 kg/hm2 nitrogen, reducing planting density was recommended to alleviate deteriorating population quality and lodging index.
Not reportedTaxon
Verbatim
e0“At the nitrogen application rate of 225 kg/hm2,planting density should be reduced to alleviate deterioration of population quality index and decreased lodging index.The suitable planting density was 50 cm × 50 cm”
Claim · model-written summary
Rice population quality was significantly correlated with internode lodging resistance and yield.
- Taxon
- RiceOryza sativat0
- Organ / stage
- internodee0
- Outcome
- internode lodging resistance and yielde0
- Qualifier
- significantly correlatede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlation analysis indicated population quality was significantly correlated with internode lodging resistance and yield”
t0“Rice Intensification”
Claim · model-written summary
Light transmission at heading and 30 days later and root sap flow at 30 days may indicate rice yield and lodging resistance.
- Taxon
- riceOryza sativae0
- Organ / stage
- rice roote0
- Outcome
- grain yield and culm lodging resistancee0
- Qualifier
- might be indicatorse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Middle part light transmission rate in rice population at full heading and 30 days after full heading,and amount of sap flow of rice root at 30 days after full heading might be indicators for grain yield and culm lodging resistance”
The same questions in other papers
density · disease · Oryza sativa (rice)Positive and negative results
4 papers in the same direction as this paper · 6 in the opposite direction
- negative
- no effect
- negative
7 papers more in this group
See all 11 papers →nitrogen · disease · Oryza sativa (rice)Positive and negative results
38 papers in the same direction as this paper · 42 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- negative
78 papers more in this group
See all 82 papers →density · growth · Oryza sativa (rice)Positive and negative results
72 papers in the same direction as this paper · 23 in the opposite direction
- no effect
- no effect
- negative
92 papers more in this group
See all 96 papers →density · yield · Oryza sativa (rice)Positive and negative results
329 papers in the same direction as this paper · 58 in the opposite direction · 7 reporting no difference from an alternative
- no effect
- no effect
- no effect
391 papers more in this group
See all 395 papers →nitrogen · growth · Oryza sativa (rice)Positive and negative results
401 papers in the same direction as this paper · 101 in the opposite direction · 8 reporting no difference from an alternative
- negative
- negative
- negative
507 papers more in this group
See all 511 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
- negative
- negative
- negative
2,041 papers more in this group
See all 2,045 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.