Abstract
Toxic compounds which belong to PAHs are generated during all types of combustion of fuels and other substances as well as a result of natural processes (mineralisation). Products which appear during the above processes eventually reach soil, where they accumulate. The objective of this study has been to evaluate the effect of anthracene and pyrene accumulated in soil on yield, concentration of macronutrients (N, P, K, Mg, Ca, Na) and their uptake by cv. Vilmorin butter lettuce (Lactuca sativa L.) grown under the minimum and 3-fold enriched abundance of substrate. A pot experiment in four replicates was carried out twice in a greenhouse at the University of Warmia and Mazury in Olsztyn, in the spring of 2007 and 2008. Supplementary fertilisation was applied before planting butter lettuce. At the first rate of fertilisation, nitorgen was introduced in a full dose before planting lettuce, but at the triple rate of nutrients in substrate, it was divided into 2/3 of the dose before planting and the remaining 1/3 applied to soil 10 days after planting. Soil contamination with anthracene (ANT) and pyrene (PYR) or their mixture started 10 days after planting lettuce. Soil application of the two PAHs was performed 5 times at five-day intervals until the end of the growing season of lettuce. Determination of macronutrients (N, P, K, Mg, Ca, Na) was accomplished with standard methods after mineralisation (H 2 SO 4 + H 2 O 2 ) of the plant material dried at 60 o C. The determinations were peformed in comparison to certified material (CTA-VTL-2). Increasing the abundance of substrate in nutrients (N, P, K, Mg, Na, Cl) by three-fold led to a 13.7% increase in yield of lettuce heads. The PAH compounds present in the substrate depressed lettuce yield. This tendency was more evident when anthracene rather than pyrene contaminated soil. ANT and PYR depressed the concentration of nitrogen but raised the concentration of calcium in substrate less abundant in nutrients.
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Claims 5
Claim · model-written summary
Threefold substrate nutrient abundance increased lettuce head yield by 13.7%.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- Increasing the abundance of substrate in nutrients (N, P, K, Mg, Na, Cl) by three-folde0
- Outcome
- yield of lettuce headse0
- Direction
- increasee0
- Value
- 13.7%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the abundance of substrate in nutrients (N, P, K, Mg, Na, Cl) by three-fold led to a 13.7% increase in yield of lettuce heads”
Claim · model-written summary
PAH contamination depressed lettuce yield.
- Taxon
- lettuceLactuca sativae0
- Treatment
- PAH compounds present in the substratee0
- Outcome
- lettuce yielde0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PAH compounds present in the substrate depressed lettuce yield”
Claim · model-written summary
Anthracene had a stronger depressive tendency on yield than pyrene.
- Taxon
- lettuceLactuca sativat0
- Treatment
- anthracenee0
- Outcome
- yieldt0
- Direction
- more evidente0
- Comparator
- pyrenee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This tendency was more evident when anthracene rather than pyrene contaminated soil”
t0“yield and accumulation of macronutrients in butter lettuce (Lactuca sativa L.)”
Claim · model-written summary
Anthracene and pyrene depressed nitrogen concentration in nutrient-poor substrate.
- Taxon
- butter lettucet0
- Treatment
- ANT and PYRe0
- Outcome
- concentration of nitrogene0
- Direction
- depressede0
- Qualifier
- substrate less abundant in nutrientse0
Not reportedComparator
Verbatim
e0“ANT and PYR depressed the concentration of nitrogen but raised the concentration of calcium in substrate less abundant in nutrients”
t0“butter lettuce (Lactuca sativa L.)”
Claim · model-written summary
Anthracene and pyrene raised calcium concentration in nutrient-poor substrate.
- Taxon
- butter lettucet0
- Treatment
- ANT and PYRe0
- Outcome
- concentration of calciume0
- Direction
- raisede0
- Qualifier
- substrate less abundant in nutrientse0
Not reportedComparator
Verbatim
e0“ANT and PYR depressed the concentration of nitrogen but raised the concentration of calcium in substrate less abundant in nutrients”
t0“butter lettuce (Lactuca sativa L.)”
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