Abstract
Relationship among nitrogen application rate,biochemical substrate content,such as flavonoid,phenol,soluble sugar,free amino acid,as well as leaf nitrogen at topping,and leaf brown spot occurrence after topping were studied in two different climatic counties,Shilin and Xundian,respectively.Results showed that the relationship mentioned above was similar in leaves on different positions of the stalk at two experimental sites.Higher nitrogen application rate caused higher accumulation of N and free amino acid content,but less flavonoid,phenol and soluble sugar.In addition,increased severity of leaf brown spot was observed with increasing nitrogen rate treatment.Significant negative correlations existed between the content of flavonoid,phenol,soluble sugar and the occurrence of the brown spot disease,while positive correlation was observed between the content of free amino acid and N in leaf and the occurrence of the brown spot.Result suggested that the different N treatment may cause flavonoid,phenol,soluble sugar,free amino acid content difference at topping,and the brown spot severity difference after topping.Result also recommended that the moderate application of nitrogen rate should be considered for the control of brown spot disease under experimental conditions.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
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 12
Claim · model-written summary
Higher nitrogen application increased tobacco N.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- Higher nitrogen application ratee0
- Outcome
- Ne0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher nitrogen application rate caused higher accumulation of N and free amino acid content,but less flavonoid,phenol and soluble sugar.”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
Higher nitrogen application increased tobacco free amino acid content.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Higher nitrogen application ratee0
- Outcome
- free amino acid contente0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher nitrogen application rate caused higher accumulation of N and free amino acid content,but less flavonoid,phenol and soluble sugar.”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
Higher nitrogen application reduced tobacco flavonoid.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Higher nitrogen application ratee0
- Outcome
- flavonoide0
- Direction
- lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher nitrogen application rate caused higher accumulation of N and free amino acid content,but less flavonoid,phenol and soluble sugar.”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
Higher nitrogen application reduced tobacco phenol.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Higher nitrogen application ratee0
- Outcome
- phenole0
- Direction
- lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher nitrogen application rate caused higher accumulation of N and free amino acid content,but less flavonoid,phenol and soluble sugar.”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
Higher nitrogen application reduced tobacco soluble sugar.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Higher nitrogen application ratee0
- Outcome
- soluble sugare0
- Direction
- lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher nitrogen application rate caused higher accumulation of N and free amino acid content,but less flavonoid,phenol and soluble sugar.”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
Increasing nitrogen rate increased tobacco leaf brown spot severity.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- increasing nitrogen rate treatmente0
- Outcome
- severity of leaf brown spote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased severity of leaf brown spot was observed with increasing nitrogen rate treatment.”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
Tobacco flavonoid was negatively correlated with brown spot occurrence.
- Taxon
- tobaccoNicotiana tabacumt0
- Compound
- flavonoide0
- Outcome
- occurrence of the brown spot diseasee0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant negative correlations existed between the content of flavonoid,phenol,soluble sugar and the occurrence of the brown spot disease”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
Tobacco phenol was negatively correlated with brown spot occurrence.
- Taxon
- tobaccoNicotiana tabacumt0
- Compound
- phenole0
- Outcome
- occurrence of the brown spot diseasee0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant negative correlations existed between the content of flavonoid,phenol,soluble sugar and the occurrence of the brown spot disease”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
Tobacco soluble sugar was negatively correlated with brown spot occurrence.
- Taxon
- tobaccoNicotiana tabacumt0
- Compound
- soluble sugare0
- Outcome
- occurrence of the brown spot diseasee0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant negative correlations existed between the content of flavonoid,phenol,soluble sugar and the occurrence of the brown spot disease”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
Tobacco free amino acid was positively correlated with brown spot occurrence.
- Taxon
- tobaccoNicotiana tabacumt0
- Compound
- free amino acide0
- Outcome
- occurrence of the brown spote0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive correlation was observed between the content of free amino acid and N in leaf and the occurrence of the brown spot.”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
Tobacco N was positively correlated with brown spot occurrence.
- Taxon
- tobaccoNicotiana tabacumt0
- Compound
- Ne0
- Outcome
- occurrence of the brown spote0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive correlation was observed between the content of free amino acid and N in leaf and the occurrence of the brown spot.”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
Claim · model-written summary
The authors recommend moderate nitrogen application for brown spot control under experimental conditions.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- moderate application of nitrogen ratee0
- Qualifier
- under experimental conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the moderate application of nitrogen rate should be considered for the control of brown spot disease under experimental conditions.”
t0“Study on the relationship between the content of nitrogen and some biophysiological substances at topping and the occurrence of brown spot of tobacco applied with different amount of nitrogen”
The same questions in other papers
nitrogen · disease · Nicotiana tabacum (tobacco)Positive and negative results
6 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 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.