Abstract
A pot experiment was conducted to study the effects of different nitrogen nutrition on photosynthetic characteristics in tobacco leaves.The results showed as follow: photosynthetic rate(Pn),leaf stomatal conductance(SC),transpiration rate(Tr),the intercellular CO_2 concentration(Ci) were the lowest in the treatment of only NH_4-N after 20 days,all photosynthetic physiology indexes were the highest in the treatment of NH_4-N∶NO_3-N(1∶1),and in the 24th day,photosynthetic rate(Pn) was 1.2-1.8 times of the other treatments.When tobacco were cultured by mixing extract from sesame seed cake,NH_4-N′s unfavorable effects on photosynthetic physiology were reduced to a certain extent.
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Claims 5
Claim · model-written summary
After 20 days, sole NH_4-N gave the lowest photosynthetic rate, stomatal conductance, transpiration rate and intercellular CO_2 concentration.
- Taxon
- Tobacco
Nicotiana tabacumt0 - Treatment
- only NH_4-Ne0
- Outcome
- photosynthetic rate(Pn),leaf stomatal conductance(SC),transpiration rate(Tr)e0
- Direction
- loweste0
- Qualifier
- after 20 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic rate(Pn),leaf stomatal conductance(SC),transpiration rate(Tr),the intercellular CO_2 concentration(Ci) were the lowest in the treatment of only NH_4-N after 20 days”
t0“Tobacco Leaves”
e2“NH_4-N∶NO_3-N(1∶1)”
Claim · model-written summary
After 20 days, sole NH_4-N gave the lowest intercellular CO_2 concentration.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- only NH_4-Ne0
- Outcome
- intercellular CO_2 concentration(Ci)e0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the intercellular CO_2 concentration(Ci) were the lowest in the treatment of only NH_4-N after 20 days”
t0“Tobacco Leaves”
e2“NH_4-N∶NO_3-N(1∶1)”
Claim · model-written summary
The 1∶1 NH_4-N:NO_3-N treatment gave the highest photosynthetic physiology indexes.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- NH_4-N∶NO_3-N(1∶1)e0
- Outcome
- photosynthetic physiology indexese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all photosynthetic physiology indexes were the highest in the treatment of NH_4-N∶NO_3-N(1∶1)”
t0“Tobacco Leaves”
e2“NH_4-N∶NO_3-N(1∶1)”
Claim · model-written summary
On day 24, photosynthetic rate under the 1∶1 nitrogen treatment was 1.2-1.8 times that of other treatments.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- NH_4-N∶NO_3-N(1∶1)e2
- Outcome
- photosynthetic rate(Pn)e0
- Value
- 1.2-1.8 timese0
- Comparator
- other treatmentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and in the 24th day,photosynthetic rate(Pn) was 1.2-1.8 times of the other treatments”
t0“Tobacco Leaves”
e2“NH_4-N∶NO_3-N(1∶1)”
Claim · model-written summary
Sesame seed cake extract reduced the adverse photosynthetic effects of NH_4-N to some extent.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- mixing extract from sesame seed cakee0
- Outcome
- NH_4-N′s unfavorable effects on photosynthetic physiologye0
- Direction
- reducede0
- Qualifier
- to a certain extente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When tobacco were cultured by mixing extract from sesame seed cake,NH_4-N′s unfavorable effects on photosynthetic physiology were reduced to a certain extent”
The same questions in other papers
Sesamum indicum · physiology: photosynthesis · Nicotiana tabacum (tobacco)Results agree
1 paper in the same direction as this paper
- positive
botanical · physiology: photosynthesis · Nicotiana tabacum (tobacco)Positive and negative results
1 in the opposite direction
- negative
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.