Abstract
Zelkova schneideriana is an important timber species used in the transformation of monoculture coniferous forests in southern China. However, the optimal light conditions for cultivating Z. schneideriana under forest canopies remain to be determined. In this study, one-year-old container seedlings of Z. schneideriana were used in a field experiment under four artificially simulated light intensities: full sunlight (CK, 100% PAR), low shade (L, 70% PAR), medium shade (M, 51% PAR), and high shade (H, 22% PAR). The results showed significant differences in growth, morphology, and photosynthetic physiology of seedlings under different light intensities. Z. schneideriana seedlings exhibited a certain degree of shade tolerance during early establishment, achieving optimal growth performance under medium shade conditions. Compared to CK, the net increments in height and diameter at root collar of seedlings under M increased by 197.69% and 145.27%, respectively. Specific leaf area was greatest under high shade, indicating that leaves tend to utilize a larger leaf area to acquire carbon resources. Seedlings under M exhibited the highest values for photosynthetic pigment content, key photosynthetic enzyme activities, and photosynthetic nitrogen- and phosphorus-use efficiencies, which were consistent with their response to light-saturated photosynthetic rate. The phenotypic plasticity indices of the seedlings ranked in the following order: photosynthetic physiological traits > light response traits > morphological traits. Photosynthetic pigment content was identified as the physiological parameter most sensitive to changes in light intensity. Therefore, for the understory introduction of Z. schneideriana seedlings, it is recommended that canopy thinning be implemented to maintain understory light intensity at approximately 50% of full sunlight, thereby facilitating rapid seedling establishment and growth.
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Claims 8
Claim · model-written summary
Height increment of Zelkova seedlings under medium shade was 197.69% higher than under full sunlight.
- Taxon
- Zelkova schneideriana
Zelkova schneiderianat0 - Treatment
- medium shade (M, 51% PAR)e0
- Outcome
- net increments in heighte1
- Direction
- increasede1
- Value
- 197.69%e1
- Comparator
- CKe1
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zelkova schneideriana seedlings”
e0“one-year-old container seedlings of Z. schneideriana were used in a field experiment under four artificially simulated light intensities: full sunlight (CK, 100% PAR), low shade (L, 70% PAR), medium shade (M, 51% PAR), and high shade (H, 22% PAR)”
e1“Compared to CK, the net increments in height and diameter at root collar of seedlings under M increased by 197.69% and 145.27%, respectively”
Claim · model-written summary
Root-collar diameter increment of Zelkova seedlings under medium shade was 145.27% higher than under full sunlight.
- Taxon
- Zelkova schneiderianaZelkova schneiderianat0
- Treatment
- medium shade (M, 51% PAR)e0
- Outcome
- diameter at root collare1
- Direction
- increasede1
- Value
- 145.27%e1
- Comparator
- CKe1
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zelkova schneideriana seedlings”
e0“one-year-old container seedlings of Z. schneideriana were used in a field experiment under four artificially simulated light intensities: full sunlight (CK, 100% PAR), low shade (L, 70% PAR), medium shade (M, 51% PAR), and high shade (H, 22% PAR)”
e1“Compared to CK, the net increments in height and diameter at root collar of seedlings under M increased by 197.69% and 145.27%, respectively”
Claim · model-written summary
Specific leaf area of Zelkova seedlings was greatest under high shade.
- Taxon
- Zelkova schneiderianaZelkova schneiderianat0
- Treatment
- high shade (H, 22% PAR)e0
- Outcome
- Specific leaf areae2
- Direction
- greateste2
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zelkova schneideriana seedlings”
e0“one-year-old container seedlings of Z. schneideriana were used in a field experiment under four artificially simulated light intensities: full sunlight (CK, 100% PAR), low shade (L, 70% PAR), medium shade (M, 51% PAR), and high shade (H, 22% PAR)”
e2“Specific leaf area was greatest under high shade”
Claim · model-written summary
Zelkova seedlings reached optimal growth under medium shade.
- Taxon
- Zelkova schneiderianaZelkova schneiderianat0
- Treatment
- medium shade conditionse3
- Outcome
- optimal growth performancee3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zelkova schneideriana seedlings”
e3“achieving optimal growth performance under medium shade conditions”
Claim · model-written summary
Photosynthetic pigment content, key photosynthetic enzyme activities and photosynthetic N- and P-use efficiencies were highest under medium shade.
- Taxon
- Zelkova schneiderianaZelkova schneiderianat0
- Treatment
- medium shade (M, 51% PAR)e0
- Outcome
- photosynthetic pigment content, key photosynthetic enzyme activities, and photosynthetic nitrogen- and phosphorus-use efficienciese4
- Direction
- higheste4
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zelkova schneideriana seedlings”
e0“one-year-old container seedlings of Z. schneideriana were used in a field experiment under four artificially simulated light intensities: full sunlight (CK, 100% PAR), low shade (L, 70% PAR), medium shade (M, 51% PAR), and high shade (H, 22% PAR)”
e4“Seedlings under M exhibited the highest values for photosynthetic pigment content, key photosynthetic enzyme activities, and photosynthetic nitrogen- and phosphorus-use efficiencies”
Claim · model-written summary
Phenotypic plasticity indices ranked photosynthetic physiological traits above light response traits, which ranked above morphological traits.
- Taxon
- Zelkova schneiderianaZelkova schneiderianat0
- Outcome
- phenotypic plasticity indicese5
- Qualifier
- photosynthetic physiological traits > light response traits > morphological traitse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zelkova schneideriana seedlings”
e5“The phenotypic plasticity indices of the seedlings ranked in the following order: photosynthetic physiological traits > light response traits > morphological traits”
Claim · model-written summary
Photosynthetic pigment content was the physiological parameter most sensitive to light intensity.
- Taxon
- Zelkova schneiderianaZelkova schneiderianat0
- Outcome
- Photosynthetic pigment contente6
- Qualifier
- most sensitive to changes in light intensitye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zelkova schneideriana seedlings”
e6“Photosynthetic pigment content was identified as the physiological parameter most sensitive to changes in light intensity”
Claim · model-written summary
The authors recommend canopy thinning to keep understory light at about 50% of full sunlight for Zelkova seedling establishment.
- Taxon
- Zelkova schneiderianaZelkova schneiderianat0
- Treatment
- canopy thinninge7
- Outcome
- understory light intensity at approximately 50% of full sunlighte7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zelkova schneideriana seedlings”
e7“it is recommended that canopy thinning be implemented to maintain understory light intensity at approximately 50% of full sunlight”
The same questions in other papers
in vitro · growth · Zelkova schneiderianaResults agree
1 paper in the same direction as this paper
- positive
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