Abstract
A field experiment was conducted using split-plot experiment design i.e.three regimes of planting density(D) as main plots and nitrogen(N) rate as sub-plots to investigate the effects of interaction between N application rate and planting density on N and potassium(K) contents,photosynthesis characteristics at round top stage and yield of flue-cured tobacco to determine the optimum N application rate and planting density for better growth,higher yield and quality of flue-cured tobacco. The preliminary results showed that planting density,N rate and the interaction between them had significant effects on the contents of N,K and carbohydrate contents,net photosynthesis rate(Pn) and yield.Significant positive correlations were obtained between N and K contents,Pn,carbohydrate content of flue-cured tobacco at round top stage and yield.Under all three-density conditions,the highest yield and N content presented at high N rate treatment,while the greatest contents of K,Pn and carbohydrate at medium N rate treatment.Under all three N rates conditions,the highest yield and K content presented at medium density,while the greatest N content at low density,and the highest Pn and carbohydrate content at low and medium density.In this study,the best combination of N and density treatment was medium density plus high N rate(D2N3),and the appropriate density and N range were 16 078 ～ 16 698 plant /hm2 and 88.10 ～ 103.19 kg /hm2 respectively for Qinyan 96.
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 8
Claim · model-written summary
Density, nitrogen rate, and their interaction significantly affected tobacco nutrient and carbohydrate contents, photosynthesis, and yield.
- Taxon
- flue-cured tobaccot0
- Treatment
- planting density,N rate and the interaction between theme0
- Outcome
- contents of N,K and carbohydrate contentse0
Not reportedComparatorDirection
Verbatim
e0“The preliminary results showed that planting density,N rate and the interaction between them had significant effects on the contents of N,K and carbohydrate contents,net photosynthesis rate(Pn) and yield.”
t0“flue-cured tobacco”
Claim · model-written summary
Tobacco nutrient content, photosynthesis and carbohydrate content correlated positively with yield.
Verbatim
e0“Significant positive correlations were obtained between N and K contents,Pn,carbohydrate content of flue-cured tobacco at round top stage and yield.”
Claim · model-written summary
High nitrogen rate gave the highest tobacco yield and nitrogen content across densities.
- Taxon
- flue-cured tobaccot0
- Treatment
- high N rate treatmente0
- Outcome
- yield and N contente0
- Direction
- higheste0
Not reportedComparator
Verbatim
e0“Under all three-density conditions,the highest yield and N content presented at high N rate treatment”
t0“flue-cured tobacco”
Claim · model-written summary
Medium nitrogen rate gave the greatest potassium, photosynthesis and carbohydrate levels.
- Taxon
- flue-cured tobaccot0
- Treatment
- medium N rate treatmente0
- Outcome
- contents of K,Pn and carbohydratee0
- Direction
- greateste0
Not reportedComparator
Verbatim
e0“while the greatest contents of K,Pn and carbohydrate at medium N rate treatment.”
t0“flue-cured tobacco”
Claim · model-written summary
Medium density gave the highest yield and potassium content across nitrogen rates.
Not reportedComparator
Verbatim
e0“Under all three N rates conditions,the highest yield and K content presented at medium density”
t0“flue-cured tobacco”
Claim · model-written summary
Low density gave the greatest nitrogen content.
Not reportedComparator
Verbatim
e0“while the greatest N content at low density”
t0“flue-cured tobacco”
Claim · model-written summary
Low and medium density gave the highest photosynthesis and carbohydrate content.
- Taxon
- flue-cured tobaccot0
- Treatment
- low and medium densitye0
- Outcome
- Pn and carbohydrate contente0
- Direction
- higheste0
Not reportedComparator
Verbatim
e0“and the highest Pn and carbohydrate content at low and medium density.”
t0“flue-cured tobacco”
Claim · model-written summary
The authors identified medium density and high nitrogen rate as the best combination.
Verbatim
e0“the best combination of N and density treatment was medium density plus high N rate(D2N3),and the appropriate density and N range were 16 078 ～ 16 698 plant /hm2 and 88.10 ～ 103.19 kg /hm2 respectively for Qinyan 96.”
t0“flue-cured tobacco”
The same questions in other papers
nitrogen · yield · Nicotiana tabacum (tobacco)Results differ
84 papers in the same direction as this paper · 15 in the opposite direction · 3 reporting no difference from an alternative
- negative
- no effect
- negative
99 papers more in this group
See all 103 papers →in vitro · physiology: photosynthesis · Nicotiana tabacum (tobacco)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
nitrogen · physiology: photosynthesis · Nicotiana tabacum (tobacco)Positive and negative results
13 papers in the same direction as this paper · 9 in the opposite direction
- negative
- no effect
- negative
19 papers more in this group
See all 23 papers →in vitro · yield · Nicotiana tabacum (tobacco)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
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.