Abstract
The impact of light penetration into crown and the effect of rootstocks and distance between trees on photosynthetic behaviour were analysed. Apple cultivar 'Auksis' was grafted onto dwarfing rootstock P60 and super-dwarfing rootstock P22 and planted at different distances (3 1 m, 3 0.75 m and 3 0.5 m). Nitrogen balance index and photochemical reflectance index were measured at two heights: 0.8 m above ground inside the canopy and 1.5 m above ground outside the canopy; specific leaf area, fresh and dry weight were evaluated from all canopy. The significantly positive effect of dwarfing rootstock P60 on all tested indices was observed comparing to P22 rootstock. Increasing density between trees lead to a decreased specific leaf area and increased nitrogen balance index. The dry and fresh weight ratio and photochemical reflectance index were also significantly affected, but no general tendency was identified. Photochemical reflectance index was not affected by light penetration into canopy, but the nitrogen balance index significantly decreased in the upper part of the canopy. Summarizing, it can be stated that decreasing light penetration into the crown results in an increase in the specific leaf area and photochemical reflectance index, and leads to a decrease in dry and fresh weight ratio and nitrogen balance index.
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Claims 8
Claim · model-written summary
P60 significantly improved all tested indices relative to P22.
- Taxon
- apple trees
Malus domesticat0 - Treatment
- dwarfing rootstock P60e0
- Outcome
- all tested indicese0
- Direction
- positive effecte0
- Comparator
- P22 rootstocke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The significantly positive effect of dwarfing rootstock P60 on all tested indices was observed comparing to P22 rootstock.”
t0“apple trees”
Claim · model-written summary
Higher planting density decreased specific leaf area.
- Taxon
- apple treesMalus domesticat0
- Treatment
- Increasing density between treese0
- Outcome
- specific leaf areae0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing density between trees lead to a decreased specific leaf area”
t0“apple trees”
Claim · model-written summary
Higher planting density increased nitrogen balance index.
- Taxon
- apple treesMalus domesticat0
- Treatment
- Increasing density between treese0
- Outcome
- nitrogen balance indexe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing density between trees lead to a decreased specific leaf area and increased nitrogen balance index”
t0“apple trees”
Claim · model-written summary
Dry to fresh weight ratio and photochemical reflectance index were significantly affected without a general tendency.
- Taxon
- apple treesMalus domesticat0
- Outcome
- dry and fresh weight ratio and photochemical reflectance indexe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dry and fresh weight ratio and photochemical reflectance index were also significantly affected, but no general tendency was identified.”
t0“apple trees”
Claim · model-written summary
Light penetration did not affect photochemical reflectance index.
- Taxon
- apple treesMalus domesticat0
- Treatment
- light penetration into canopye0
- Outcome
- Photochemical reflectance indexe0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photochemical reflectance index was not affected by light penetration into canopy”
t0“apple trees”
Claim · model-written summary
Nitrogen balance index decreased significantly in the upper canopy.
- Taxon
- apple treesMalus domesticat0
- Organ / stage
- upper part of the canopye0
- Outcome
- nitrogen balance indexe0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the nitrogen balance index significantly decreased in the upper part of the canopy”
t0“apple trees”
Claim · model-written summary
Less crown light increased specific leaf area and photochemical reflectance index.
- Taxon
- apple treesMalus domesticat0
- Treatment
- decreasing light penetration into the crowne0
- Outcome
- specific leaf area and photochemical reflectance indexe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreasing light penetration into the crown results in an increase in the specific leaf area and photochemical reflectance index”
t0“apple trees”
Claim · model-written summary
Less crown light decreased dry to fresh weight ratio and nitrogen balance index.
- Taxon
- apple treesMalus domesticat0
- Treatment
- decreasing light penetration into the crowne0
- Outcome
- dry and fresh weight ratio and nitrogen balance indexe0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreasing light penetration into the crown results in an increase in the specific leaf area and photochemical reflectance index, and leads to a decrease in dry and fresh weight ratio and nitrogen balance index”
t0“apple trees”
The same questions in other papers
light · physiology: photosynthesis · Malus domestica (apple)Positive and negative results
3 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
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.