Abstract
The responses of Trifolium repens L.seedlings in growth,biomass and photosynthetic characteristics to 2 light intensity levels and 5 nitrogen application rate levels were hydroponically studied in growth chamber.The results showed that the stem and leaf biomass of Trifolium repens L.seedlings increased as the nitrogen concentrations increased from 5 to 15 mmol·L-1 and then decreased with the nitrogen concentrations moved from 20 to 25 mmol·L-1,but the root biomass and root/shoot ratio of Trifolium repens L.seedlings decreased with the increasing nitrogen concentration.The biomass of roots,stems,leaves and whole plant under low light decreased by 67.8%,29.9%,42.5% and 45.2%,respectively,and the root/shoot ratios decreased,but the specific leaf areas(SLA) was opposite.The root volumes of Trifolium repens L.seedlings decreased with the increasing nitrogen concentrations,when the root volume of Trifolium repens L.seedlings at the higher light intensity were higher than those at the lower light intensity.The root surface areas,root diameters and root lengths of Trifolium repens L.seedlings increased as the nitrogen concentrations from 5 to 15 mmol·L-1 and then decreased with the nitrogen concentrations moved from 20 to 25 mmol·L-1.The effects of light intensity on root length and root diameter of Trifolium repens L.seedlings significantly differed,but the root surface areas did not significantly differed.The photosynthetic rates(Pn) of Trifolium repens L.seedlings at the higher light intensity were higher than those at the lower light intensity,and the Pn increased as the nitrogen concentrations increased from 5 to 15 mmol·L-1 and then decreased as the nitrogen concentrations moved from 20 to 25 mmol·L-1.The effects of light intensity on stomatal conductance(Gs),intercellular CO2 concentration(Ci) and transpiration rate(Tr) did not significantly differed,but the effects of nitrogen concentration on Gs,Ci and Tr were significant.The effect of light and nitrogen as well their interaction on seedling growth and photosynthesis of Trifolium repens L.seedlings were significant.Light and nitrogen shortages all inhibited the growth capacity of the seedling,but the seedlings also had the capacities to acclimatize and adapt to the disadvantageous environments.
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 20
Claim · model-written summary
Stem and leaf biomass rose from 5 to 15 mmol·L-1 nitrogen, then fell from 20 to 25 mmol·L-1.
- Taxon
- Trifolium repens L.
Trifolium repense0 - Treatment
- nitrogen concentrationse0
- Outcome
- stem and leaf biomasse0
- Direction
- increasede0
- Qualifier
- 20 to 25 mmol·L-1e0
- Comparator
- 5 to 15 mmol·L-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the stem and leaf biomass of Trifolium repens L.seedlings increased as the nitrogen concentrations increased from 5 to 15 mmol·L-1 and then decreased with the nitrogen concentrations moved from 20 to 25 mmol·L-1”
Claim · model-written summary
Root biomass and root/shoot ratio decreased as nitrogen concentration increased.
- Taxon
- Trifolium repens L.Trifolium repense0
- Treatment
- increasing nitrogen concentratione0
- Outcome
- root biomass and root/shoot ratioe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root biomass and root/shoot ratio of Trifolium repens L.seedlings decreased with the increasing nitrogen concentration”
Claim · model-written summary
Low light reduced root biomass by 67.8%.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Treatment
- low lighte0
- Outcome
- biomass of rootse0
- Direction
- decreasede0
- Value
- 67.8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biomass of roots,stems,leaves and whole plant under low light decreased by 67.8%,29.9%,42.5% and 45.2%,respectively”
t0“Trifolium repens L.”
Claim · model-written summary
Low light reduced stem biomass by 29.9%.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Treatment
- low lighte0
- Outcome
- stemse0
- Direction
- decreasede0
- Value
- 29.9%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biomass of roots,stems,leaves and whole plant under low light decreased by 67.8%,29.9%,42.5% and 45.2%,respectively”
t0“Trifolium repens L.”
Claim · model-written summary
Low light reduced leaf biomass by 42.5%.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Treatment
- low lighte0
- Outcome
- leavese0
- Direction
- decreasede0
- Value
- 42.5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biomass of roots,stems,leaves and whole plant under low light decreased by 67.8%,29.9%,42.5% and 45.2%,respectively”
t0“Trifolium repens L.”
Claim · model-written summary
Low light reduced whole-plant biomass by 45.2%.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Treatment
- low lighte0
- Outcome
- whole plante0
- Direction
- decreasede0
- Value
- 45.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biomass of roots,stems,leaves and whole plant under low light decreased by 67.8%,29.9%,42.5% and 45.2%,respectively”
t0“Trifolium repens L.”
Claim · model-written summary
Low light decreased root/shoot ratios.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Outcome
- root/shoot ratiose0
- Direction
- decreasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root/shoot ratios decreased”
t0“Trifolium repens L.”
Claim · model-written summary
Specific leaf area responded oppositely to the biomass decrease under low light.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Treatment
- low lighte1
- Outcome
- specific leaf areas(SLA)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the specific leaf areas(SLA) was opposite”
e1“under low light decreased”
t0“Trifolium repens L.”
Claim · model-written summary
Root volume decreased with increasing nitrogen concentration.
- Taxon
- Trifolium repens L.Trifolium repense0
- Treatment
- increasing nitrogen concentrationse0
- Outcome
- root volumese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root volumes of Trifolium repens L.seedlings decreased with the increasing nitrogen concentrations”
Claim · model-written summary
Root volume was higher at higher than lower light intensity.
- Taxon
- Trifolium repens L.Trifolium repense0
- Treatment
- higher light intensitye0
- Outcome
- root volumee0
- Direction
- highere0
- Comparator
- lower light intensitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root volume of Trifolium repens L.seedlings at the higher light intensity were higher than those at the lower light intensity”
Claim · model-written summary
Root surface area, diameter and length rose at 5–15 mmol·L-1 nitrogen then fell at 20–25 mmol·L-1.
- Taxon
- Trifolium repens L.Trifolium repense0
- Treatment
- nitrogen concentrationse0
- Outcome
- root surface areas,root diameters and root lengthse0
- Direction
- increasede0
- Qualifier
- 20 to 25 mmol·L-1e0
- Comparator
- 5 to 15 mmol·L-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root surface areas,root diameters and root lengths of Trifolium repens L.seedlings increased as the nitrogen concentrations from 5 to 15 mmol·L-1 and then decreased with the nitrogen concentrations moved from 20 to 25 mmol·L-1”
Claim · model-written summary
Light intensity effects differed significantly for root length and diameter.
- Taxon
- Trifolium repens L.Trifolium repense0
- Treatment
- light intensitye0
- Outcome
- root length and root diametere0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of light intensity on root length and root diameter of Trifolium repens L.seedlings significantly differed”
Claim · model-written summary
Light intensity did not significantly affect root surface area.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Outcome
- root surface arease0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root surface areas did not significantly differed”
t0“Trifolium repens L.”
Claim · model-written summary
Photosynthetic rate was higher under higher than lower light intensity.
- Taxon
- Trifolium repens L.Trifolium repense0
- Treatment
- higher light intensitye0
- Outcome
- photosynthetic rates(Pn)e0
- Direction
- highere0
- Comparator
- lower light intensitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthetic rates(Pn) of Trifolium repens L.seedlings at the higher light intensity were higher than those at the lower light intensity”
Claim · model-written summary
Photosynthetic rate rose with nitrogen from 5 to 15 mmol·L-1 then fell from 20 to 25 mmol·L-1.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Treatment
- nitrogen concentrationse0
- Outcome
- Pne0
- Direction
- increasede0
- Qualifier
- 20 to 25 mmol·L-1e0
- Comparator
- 5 to 15 mmol·L-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Pn increased as the nitrogen concentrations increased from 5 to 15 mmol·L-1 and then decreased as the nitrogen concentrations moved from 20 to 25 mmol·L-1”
t0“Trifolium repens L.”
Claim · model-written summary
Light intensity did not significantly change stomatal conductance, intercellular CO2 or transpiration.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Treatment
- light intensitye0
- Outcome
- stomatal conductance(Gs),intercellular CO2 concentration(Ci) and transpiration rate(Tr)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of light intensity on stomatal conductance(Gs),intercellular CO2 concentration(Ci) and transpiration rate(Tr) did not significantly differed”
t0“Trifolium repens L.”
Claim · model-written summary
Nitrogen concentration significantly affected stomatal conductance, intercellular CO2 and transpiration.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Treatment
- nitrogen concentratione0
- Outcome
- Gs,Ci and Tre0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of nitrogen concentration on Gs,Ci and Tr were significant”
t0“Trifolium repens L.”
Claim · model-written summary
Light, nitrogen and their interaction significantly affected seedling growth and photosynthesis.
- Taxon
- Trifolium repens L.Trifolium repense0
- Treatment
- light and nitrogen as well their interactione0
- Outcome
- seedling growth and photosynthesise0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of light and nitrogen as well their interaction on seedling growth and photosynthesis of Trifolium repens L.seedlings were significant”
Claim · model-written summary
Light and nitrogen shortage inhibited seedling growth capacity.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Treatment
- Light and nitrogen shortagese0
- Outcome
- growth capacity of the seedlinge0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Light and nitrogen shortages all inhibited the growth capacity of the seedling”
t0“Trifolium repens L.”
Claim · model-written summary
Seedlings showed capacity to acclimatize and adapt to adverse environments.
- Taxon
- Trifolium repens L.Trifolium repenst0
- Outcome
- capacities to acclimatize and adapt to the disadvantageous environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the seedlings also had the capacities to acclimatize and adapt to the disadvantageous environments”
t0“Trifolium repens L.”
The same questions in other papers
nitrogen · growth · Trifolium repens (white clover)Results differ
14 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- positive
24 papers more in this group
See all 28 papers →light · physiology: photosynthesis · Trifolium repens (white clover)Positive and negative results
1 in the opposite direction
- negative
light · physiology: gas exchange · Trifolium repens (white clover)Positive and negative results
1 in the opposite direction
- positive
light · growth · Trifolium repens (white clover)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- negative
4 papers more in this group
See all 8 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.