Abstract
【Objective】 Lodging is one of the important constraints to high yield and stable production of rice.This study investigated the effects of nitrogen application on stem lodging resistance and its relationship with stem morphological and mechanical traits.The mechanisms of stem lodging resistance were explored.Results of the study will provide a theoretical basis for lodging resistance and high yield cultivation of rice.【Method】 An indica rice cv.Yinjinruanzhan was grown in field experiments conducted with four nitrogen levels at Guangzhou.Lodging index and morphological and mechanical traits of basal culms were measured.【Result】As nitrogen input increased,plant height,gravity center height and basal internode length increased,basal internode plumpness declined,breaking resistance and elastic modulus decreased,lodging index increased and lodging resistance declined.Nitrogen treatment affected stem morphological and mechanical traits of rice.Lodging index was positively correlated with plant height,gravity center height and basal internode length,while negatively correlated with basal internode plumpness,breaking resistance and elastic modulus,and mostly significant.Positive correlation was found between lodging index and spikelet number per m2,while the correlation between lodging index and filled grain rate and 1000-grain weight were negative.【Conclusion】Nitrogen application affects stem lodging resistance through morphological traits such as plant height,gravity center height,basal internode length,basal internode plumpness,and mechanical traits such as stem bending moment and breaking resistance.
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Claims 13
Claim · model-written summary
Increasing nitrogen raised rice plant height.
- Taxon
- Rice
Oryza sativat0 - Material
- Yinjinruanzhane1
- Treatment
- nitrogen inpute0
- Outcome
- plant heighte0
- Direction
- increasede0
- Setting
- Guangzhoue1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As nitrogen input increased,plant height,gravity center height and basal internode length increased”
e1“An indica rice cv.Yinjinruanzhan was grown in field experiments conducted with four nitrogen levels at Guangzhou”
t0“Rice”
Claim · model-written summary
Increasing nitrogen raised gravity center height.
- Taxon
- RiceOryza sativat0
- Treatment
- nitrogen inpute0
- Outcome
- gravity center heighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As nitrogen input increased,plant height,gravity center height and basal internode length increased”
t0“Rice”
Claim · model-written summary
Increasing nitrogen lengthened basal internodes.
- Taxon
- RiceOryza sativat0
- Treatment
- nitrogen inpute0
- Outcome
- basal internode lengthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As nitrogen input increased,plant height,gravity center height and basal internode length increased”
t0“Rice”
Claim · model-written summary
Increasing nitrogen reduced basal internode plumpness.
- Taxon
- RiceOryza sativat0
- Treatment
- nitrogen inpute0
- Outcome
- basal internode plumpnesse0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As nitrogen input increased,plant height,gravity center height and basal internode length increased,basal internode plumpness declined”
t0“Rice”
Claim · model-written summary
Increasing nitrogen reduced stem breaking resistance.
- Taxon
- RiceOryza sativat0
- Outcome
- breaking resistancee0
- Direction
- decreasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“breaking resistance and elastic modulus decreased”
t0“Rice”
Claim · model-written summary
Increasing nitrogen reduced elastic modulus.
- Taxon
- RiceOryza sativat0
- Outcome
- elastic moduluse0
- Direction
- decreasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“breaking resistance and elastic modulus decreased”
t0“Rice”
Claim · model-written summary
Increasing nitrogen raised the lodging index.
- Taxon
- RiceOryza sativat0
- Outcome
- lodging indexe0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lodging index increased and lodging resistance declined”
t0“Rice”
Claim · model-written summary
Increasing nitrogen reduced lodging resistance.
- Taxon
- RiceOryza sativat0
- Outcome
- lodging resistancee0
- Direction
- declinede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lodging index increased and lodging resistance declined”
t0“Rice”
Claim · model-written summary
Lodging index was positively correlated with plant height, gravity center height and basal internode length.
- Taxon
- RiceOryza sativat0
- Organ / stage
- basal internodee0
- Outcome
- Lodging indexe0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lodging index was positively correlated with plant height,gravity center height and basal internode length”
t0“Rice”
Claim · model-written summary
Lodging index was negatively correlated with basal internode plumpness, breaking resistance and elastic modulus; most correlations were significant.
- Taxon
- RiceOryza sativat0
- Organ / stage
- basal internodee0
- Outcome
- basal internode plumpness,breaking resistance and elastic moduluse0
- Direction
- negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negatively correlated with basal internode plumpness,breaking resistance and elastic modulus,and mostly significant”
t0“Rice”
Claim · model-written summary
Lodging index and spikelet number per square metre were positively correlated.
- Taxon
- RiceOryza sativat0
- Organ / stage
- spikelete0
- Outcome
- spikelet number per m2e0
- Direction
- Positive correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Positive correlation was found between lodging index and spikelet number per m2”
t0“Rice”
Claim · model-written summary
Lodging index was negatively correlated with filled grain rate and 1000-grain weight.
- Taxon
- RiceOryza sativat0
- Organ / stage
- graine0
- Outcome
- filled grain rate and 1000-grain weighte0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the correlation between lodging index and filled grain rate and 1000-grain weight were negative”
t0“Rice”
Claim · model-written summary
The authors attribute nitrogen effects on lodging resistance to stem morphology and mechanics.
- Taxon
- RiceOryza sativat0
- Organ / stage
- steme0
- Treatment
- Nitrogen applicatione0
- Outcome
- stem lodging resistancee0
- Qualifier
- morphological traitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application affects stem lodging resistance through morphological traits such as plant height,gravity center height,basal internode length,basal internode plumpness,and mechanical traits such as stem bending moment and breaking resistance”
t0“Rice”
The same questions in other papers
nitrogen · growth · Oryza sativa (rice)Positive and negative results
108 papers in the same direction as this paper · 402 in the opposite direction
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