Abstract
The effect of nitrogen source on the growth and development of flue-cured tobacco root system was studied by pot experiment. The results showed that the growth and development of root system could be promoted by (equal) application of NO~-_3-N and NH~+_4-N at early stage, and the same effect could be obtained with 20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-N at later stage, which led to the enhancement of root activity, the decrease of breath intensity, the increase of root dry matter weight, better downward stretching of root in soil, higher contents of nicotine, soluble total sugar and starch, and vigorous root system.
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
Equal nitrate and ammonium nitrogen promoted early tobacco root growth and development.
- Taxon
- Tobacco
Nicotiana tabacumt0 - Organ / stage
- root systeme0
- Treatment
- (equal) application of NO~-_3-N and NH~+_4-Ne0
- Outcome
- growth and development of root systeme0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Flue-cured Tobacco Root System”
e0“the growth and development of root system could be promoted by (equal) application of NO~-_3-N and NH~+_4-N at early stage”
Claim · model-written summary
The cake fertilizer, nitrate and ammonium mix promoted later root growth and development.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- Root Systemt0
- Treatment
- 20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-Ne0
- Outcome
- the same effecte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Flue-cured Tobacco Root System”
e0“the same effect could be obtained with 20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-N at later stage”
Claim · model-written summary
The later nitrogen mix enhanced root activity.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- 20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-Ne0
- Outcome
- root activitye0
- Direction
- enhancemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Flue-cured Tobacco Root System”
e0“20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-N at later stage, which led to the enhancement of root activity”
Claim · model-written summary
The later nitrogen mix decreased root breath intensity.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- 20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-Ne0
- Outcome
- breath intensitye0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Flue-cured Tobacco Root System”
e0“20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-N at later stage, which led to the enhancement of root activity, the decrease of breath intensity”
Claim · model-written summary
The later nitrogen mix increased root dry matter weight.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- 20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-Ne0
- Outcome
- root dry matter weighte0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Flue-cured Tobacco Root System”
e0“20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-N at later stage, which led to the enhancement of root activity, the decrease of breath intensity, the increase of root dry matter weight”
Claim · model-written summary
The later nitrogen mix improved downward root extension in soil.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- 20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-Ne0
- Outcome
- downward stretching of root in soile0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Flue-cured Tobacco Root System”
e0“20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-N at later stage, which led to the enhancement of root activity, the decrease of breath intensity, the increase of root dry matter weight, better downward stretching of root in soil”
Claim · model-written summary
The later nitrogen mix raised nicotine, soluble total sugar and starch contents.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- 20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-Ne0
- Outcome
- contents of nicotine, soluble total sugar and starche0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Flue-cured Tobacco Root System”
e0“20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-N at later stage, which led to the enhancement of root activity, the decrease of breath intensity, the increase of root dry matter weight, better downward stretching of root in soil, higher contents of nicotine, soluble total sugar and starch”
Claim · model-written summary
The later nitrogen mix produced a vigorous root system.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- 20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-Ne0
- Outcome
- vigorous root systeme0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Flue-cured Tobacco Root System”
e0“20% nitrogen of cake fertilizer+40% NO~-_3-N+40% NH~+_4-N at later stage, which led to the enhancement of root activity, the decrease of breath intensity, the increase of root dry matter weight, better downward stretching of root in soil, higher contents of nicotine, soluble total sugar and starch, and vigorous root system”
The same questions in other papers
nitric oxide · growth · Nicotiana tabacum (tobacco)Positive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
3 papers more in this group
See all 7 papers →nitric oxide · quality: sugar starch · Nicotiana tabacum (tobacco)Results agree
1 paper in the same direction as this paper
- positive
nitrogen · quality: sugar starch · Nicotiana tabacum (tobacco)Positive and negative results
7 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- negative
8 papers more in this group
See all 12 papers →fertilization · quality: sugar starch · Nicotiana tabacum (tobacco)Positive and negative results
33 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- no effect
36 papers more in this group
See all 40 papers →nitrogen · growth · Nicotiana tabacum (tobacco)Positive and negative results
55 papers in the same direction as this paper · 17 in the opposite direction
- negative
- negative
- negative
69 papers more in this group
See all 73 papers →fertilization · growth · Nicotiana tabacum (tobacco)Positive and negative results
153 papers in the same direction as this paper · 27 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- negative
178 papers more in this group
See all 182 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.