Abstract
N-fixing tree species, such as black locust, have achieved very promising results in the reclamation of technosols, especially those at combustion waste disposal sites, which have extremely poor nutrients and adverse physicochemical parameters. This paper presents an assessment of the survival rates, growth parameters, and quality and vitality of and nutrient supply (NPK) to black locust (Robinia pseudoacacia L.) specimens that were experimentally planted on a lignite combustion waste disposal site. The black locust seedlings were introduced directly into the combustion waste using two variants of NPK (7% N, 5.5% P2O5, and 9% K2O) fertilisation, at doses of 250 and 500 kg ha−1, and in control plots with no mineral fertilisation. No significant impacts of the applied mineral fertilisation were found on the soil properties, growth parameters, or nutrient supplies to the trees. Black locust introduced to the landfill after three years of revegetation was characterised by a very high survival rate of 95%–100%, as well as good growth parameters (height and diameter at the root collar). Nutrient supply was determined on the basis of the chemical composition of the leaves, which indicated an adequate supply of nitrogen, similar to levels found under natural conditions. In the case of K and P, the supply levels were lower than optimal when compared with data from the literature. However, at this initial stage of tree development on the combustion waste disposal site, nutrient supply is similar on all variants and is not a critical factor for successful black locust introduction. We suggest using growth parameters, survival, and vitality of trees as decisive factors for the reclamation of combustion waste landfill sites strategy. All these factors confirmed the usefulness of black locust to the reclamation of combustion waste disposal sites.
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Claims 8
Claim · model-written summary
NPK fertilisation had no significant effect on soil properties, growth parameters or nutrient supply of black locust compared with unfertilised control plots.
- Taxon
- black locust
Robinia pseudoacaciae0 - Treatment
- NPK (7% N, 5.5% P2O5, and 9% K2O) fertilisatione1
- Outcome
- soil properties, growth parameters, or nutrient suppliese3
- Direction
- No significant impactse3
- Comparator
- control plots with no mineral fertilisatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to black locust (Robinia pseudoacacia L.) specimens”
e1“two variants of NPK (7% N, 5.5% P2O5, and 9% K2O) fertilisation”
e2“in control plots with no mineral fertilisation”
e3“No significant impacts of the applied mineral fertilisation were found on the soil properties, growth parameters, or nutrient supplies to the trees”
Claim · model-written summary
Black locust introduced to the landfill had a very high survival rate of 95%–100%.
- Taxon
- black locustRobinia pseudoacaciae0
- Outcome
- survival ratee4
- Value
- 95%–100%e4
- Setting
- landfille4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to black locust (Robinia pseudoacacia L.) specimens”
e4“Black locust introduced to the landfill after three years of revegetation was characterised by a very high survival rate of 95%–100%”
Claim · model-written summary
Black locust introduced to the landfill had good growth parameters (height and diameter at the root collar).
- Taxon
- black locustRobinia pseudoacaciae0
- Outcome
- growth parameters (height and diameter at the root collar)e5
- Qualifier
- goode5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to black locust (Robinia pseudoacacia L.) specimens”
e5“good growth parameters (height and diameter at the root collar)”
Claim · model-written summary
Black locust showed an adequate nitrogen supply in its leaves, similar to levels under natural conditions.
- Taxon
- black locustRobinia pseudoacaciae0
- Organ / stage
- leavese7
- Outcome
- supply of nitrogene6
- Qualifier
- similar to levels found under natural conditionse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to black locust (Robinia pseudoacacia L.) specimens”
e6“which indicated an adequate supply of nitrogen, similar to levels found under natural conditions”
e7“Nutrient supply was determined on the basis of the chemical composition of the leaves”
Claim · model-written summary
Supply levels of K and P in black locust were lower than optimal compared with data from the literature.
- Taxon
- black locustRobinia pseudoacaciae0
- Compound
- K and Pe1
- Outcome
- supply levelse1
- Direction
- lowere1
- Comparator
- data from the literaturee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to black locust (Robinia pseudoacacia L.) specimens”
e1“In the case of K and P, the supply levels were lower than optimal when compared with data from the literature”
Claim · model-written summary
Nutrient supply is similar on all fertilisation variants and is not a critical factor for black locust introduction.
- Taxon
- black locustRobinia pseudoacaciae0
- Outcome
- nutrient supplye0
- Direction
- similar on all variantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nutrient supply is similar on all variants and is not a critical factor for successful black locust introduction”
Claim · model-written summary
The authors recommend using growth parameters, survival and vitality of trees as decisive factors for reclamation of combustion waste landfill sites.
- Taxon
- black locustRobinia pseudoacaciae0
- Outcome
- growth parameters, survival, and vitality of treese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to black locust (Robinia pseudoacacia L.) specimens”
e1“We suggest using growth parameters, survival, and vitality of trees as decisive factors for the reclamation of combustion waste landfill sites strategy”
Claim · model-written summary
Black locust is useful for reclamation of combustion waste disposal sites.
- Taxon
- black locustRobinia pseudoacaciae0
- Outcome
- the usefulness of black locust to the reclamation of combustion waste disposal sitese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to black locust (Robinia pseudoacacia L.) specimens”
e1“All these factors confirmed the usefulness of black locust to the reclamation of combustion waste disposal sites”
The same questions in other papers
fertilization · growth · Robinia pseudoacacia (black locust)Positive and negative results
2 papers in the same direction as this paper · 5 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.