Abstract
Abstract ‘Dodd’ pecan seedlings were exposed to 3 levels of soil aeration for 30 days; 100%, 5%, and 0% of the container surface exposed to the atmosphere. These treatments resulted in about 21%, 13.5%, and 3% soil O2and 0.3%, 5%, and 13% soil CO2for 100%, 5%, and 0% of the container surface exposed, respectively. Restricting soil aeration induced partial stomatal closure, and decreased leaf number, leaf area, and leaf, trunk and root dry weights. The decrease in root dry weight associated with reduced soil aeration exceeded the decrease in top dry weight by about 50%. Translocation of N and P to the leaves was reduced when soil aeration was restricted, but root N and P concentrations were increased compared to trees grown in well aerated soil. Leaf elemental concentrations of Ca, Mg, and Mn were lower when trees were exposed to reduced soil aeration. Zinc and Fe concentrations were greater in the roots of trees with low aeration, but leaf and trunk concentrations of Zn and Fe were not affected
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Claims 8
Claim · model-written summary
Restricted aeration caused partial stomatal closure.
- Taxon
- pecan trees
_1_(24790682337).jpg?width=60)
Carya illinoinensist0 - Treatment
- Restricting soil aeratione0
- Outcome
- partial stomatal closuree0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_1_(24790682337).jpg?width=500)
Verbatim
e0“Restricting soil aeration induced partial stomatal closure”
t0“pecan trees”
Claim · model-written summary
Restricted aeration decreased leaf number and area and leaf, trunk and root dry weights.
- Taxon
- pecan treesCarya illinoinensist0
- Treatment
- Restricting soil aeratione1
- Outcome
- leaf number, leaf area, and leaf, trunk and root dry weightse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased leaf number, leaf area, and leaf, trunk and root dry weights”
e1“Restricting soil aeration induced partial stomatal closure”
t0“pecan trees”
Claim · model-written summary
Root dry weight declined about 50% more than top dry weight under reduced aeration.
- Taxon
- pecan treesCarya illinoinensist0
- Treatment
- reduced soil aeratione0
- Outcome
- root dry weighte0
- Direction
- decreasee0
- Value
- about 50%e0
- Comparator
- top dry weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decrease in root dry weight associated with reduced soil aeration exceeded the decrease in top dry weight by about 50%”
t0“pecan trees”
Claim · model-written summary
Restricted aeration reduced nitrogen and phosphorus translocation to leaves.
- Taxon
- pecan treesCarya illinoinensist0
- Treatment
- soil aeration was restrictede0
- Outcome
- Translocation of N and P to the leavese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Translocation of N and P to the leaves was reduced when soil aeration was restricted”
t0“pecan trees”
Claim · model-written summary
Restricted aeration raised root nitrogen and phosphorus concentrations relative to well aerated soil.
- Taxon
- pecan treesCarya illinoinensist0
- Treatment
- reduced soil aeratione1
- Outcome
- root N and P concentrationse0
- Direction
- increasede0
- Comparator
- trees grown in well aerated soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root N and P concentrations were increased compared to trees grown in well aerated soil”
e1“associated with reduced soil aeration”
t0“pecan trees”
Claim · model-written summary
Reduced aeration lowered leaf Ca, Mg and Mn concentrations.
- Taxon
- pecan treesCarya illinoinensist0
- Treatment
- reduced soil aeratione0
- Outcome
- Leaf elemental concentrations of Ca, Mg, and Mne0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf elemental concentrations of Ca, Mg, and Mn were lower when trees were exposed to reduced soil aeration”
t0“pecan trees”
Claim · model-written summary
Low aeration increased root Zn and Fe concentrations.
- Taxon
- pecan treesCarya illinoinensist0
- Treatment
- low aeratione0
- Outcome
- Zinc and Fe concentrations were greater in the rootse0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc and Fe concentrations were greater in the roots of trees with low aeration”
t0“pecan trees”
Claim · model-written summary
Low aeration did not affect leaf and trunk Zn and Fe concentrations.
- Taxon
- pecan treesCarya illinoinensist0
- Treatment
- low aeratione1
- Outcome
- leaf and trunk concentrations of Zn and Fee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf and trunk concentrations of Zn and Fe were not affected”
e1“trees with low aeration”
t0“pecan trees”