Abstract
Pot experiments were conducted to determine the best time for application of (ethylenediaminetetraacetic acid) EDTA and sheep manure extract (SME) in phytoremediation of a contaminated soil by Helianthus annuus. The plant was grown in a mine calcareous soil treated with increasing concentrations of EDTA or SME in 30 and 10 days before sowing (T1 and T2) and 10 and 30 days after sowing (T3 and T4). The best time for EDTA application was T4. The EDTA application before seed germination significantly reduced sunflower seedling emergence and dry weight. Soil available Pb and lead concentrations in plant organs increased with EDTA concentration but the actual amount of phytoextracted Pb decreased at high EDTA concentrations significantly, due to severe growth depression. SME application after sowing can increase plant dry weight and Pb concentration in the soil solution, enhancing the accumulated metal concentrations in shoots and roots. However the results showed that the most efficient treatments for Pb phytoextraction by sunflower are applications of 0.5 and 2 g EDTA/kg soil at T3 and T4, respectively.
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Claims 9
Claim · model-written summary
T4 was the best time for EDTA application.
Not reportedTaxon
Verbatim
e0“The best time for EDTA application was T4.”
Claim · model-written summary
EDTA before germination significantly reduced sunflower seedling emergence and dry weight.
- Taxon
- sunflower
Helianthus annuuse0 - Treatment
- EDTA application before seed germinatione0
- Outcome
- seedling emergence and dry weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The EDTA application before seed germination significantly reduced sunflower seedling emergence and dry weight.”
Claim · model-written summary
Available soil Pb increased with EDTA concentration.
- Taxon
- Helianthus annuusHelianthus annuust0
- Treatment
- EDTA concentratione0
- Outcome
- Soil available Pbe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus annuus”
e0“Soil available Pb and lead concentrations in plant organs increased with EDTA concentration”
Claim · model-written summary
Lead concentrations in plant organs increased with EDTA concentration.
- Taxon
- Helianthus annuusHelianthus annuust0
- Treatment
- EDTA concentratione0
- Outcome
- lead concentrations in plant organse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus annuus”
e0“Soil available Pb and lead concentrations in plant organs increased with EDTA concentration”
Claim · model-written summary
Actual phytoextracted Pb decreased significantly at high EDTA concentrations.
- Taxon
- Helianthus annuusHelianthus annuust0
- Treatment
- high EDTA concentrationse0
- Outcome
- actual amount of phytoextracted Pbe0
- Direction
- decreasede0
- Qualifier
- severe growth depressione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus annuus”
e0“the actual amount of phytoextracted Pb decreased at high EDTA concentrations significantly, due to severe growth depression”
Claim · model-written summary
SME after sowing can increase plant dry weight.
- Taxon
- Helianthus annuusHelianthus annuust0
- Treatment
- SME application after sowinge0
- Outcome
- plant dry weighte0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus annuus”
e0“SME application after sowing can increase plant dry weight and Pb concentration in the soil solution”
Claim · model-written summary
SME after sowing can increase Pb concentration in soil solution.
- Taxon
- Helianthus annuusHelianthus annuust0
- Treatment
- SME application after sowinge0
- Outcome
- Pb concentration in the soil solutione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus annuus”
e0“SME application after sowing can increase plant dry weight and Pb concentration in the soil solution”
Claim · model-written summary
SME enhanced accumulated metal concentrations in shoots and roots.
- Taxon
- Helianthus annuusHelianthus annuust0
- Outcome
- accumulated metal concentrations in shoots and rootse0
- Direction
- enhancinge0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus annuus”
e0“enhancing the accumulated metal concentrations in shoots and roots”
Claim · model-written summary
Applications of 0.5 g EDTA/kg soil at T3 were among the most efficient for sunflower Pb phytoextraction.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- 0.5 and 2 g EDTA/kg soile0
- Outcome
- Pb phytoextractione0
- Qualifier
- T3 and T4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the most efficient treatments for Pb phytoextraction by sunflower are applications of 0.5 and 2 g EDTA/kg soil at T3 and T4, respectively”
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See all 146 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.