Abstract
Due to its ability to grow on marginal sites black locust (Robinia pseudoacacia L.) has been widely planted as a short rotation coppice (SRC) system that produce a renewable biomass feedstock in several post-mining areas of East Germany. However, as most of these sites are still in an initial stage of reclamation with low humus and nutrient contents, phosphorous can play a significant role as a plant limiting factor, because legumes require more P than other plants for their development. In April 2011, two experiments were conducted to evaluate the influence of higher rates and different applications of phosphorus fertiliser on the nutrition, survival, and biomass production of two different-aged black locust SRC plantations on the post lignite-mining site “Welzow-Süd”, situated in NE Germany. Treatments were applied as triple superphosphate (30, 60 and 120 kg P ha-1) and PK fertiliser (60 kg P ha-1) through broadcasting or banding on recently harvested or planted trees, respectively. Soil, leaf and woody biomass data were analysed utilising the Mann-Whitney U test and the Spearman correlation coefficient (rS). Following two growing seasons, it was observed that the total dry weight yields of the black locust seedlings were increased strongly by up to 8 times when compared to the control group, particularly when TSP was applied through banding. P fertilisation, however, did not affect the biomass yield of six-year-old black locust trees, but P concentration in leaves among treatments of both sites was still significantly increased and sufficient from a quantity upwards of 60 kg P ha-1. Taken together, a comparably moderate amount of P fertiliser (60 kg ha-1) had a strong impact on P uptake and growth performance in the examined black locust seedlings, which reveals a high potential to improve the current fertilisation practices for SRC black locust plantations grown on our research site.
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Claims 6
Claim · model-written summary
Phosphorus fertiliser as TSP applied through banding increased total dry weight yield of black locust seedlings up to 8 times over the control group after two growing seasons.
- Taxon
- black locust
Robinia pseudoacaciae1 - Organ / stage
- seedlingse1
- Treatment
- TSP was applied through bandinge1
- Outcome
- total dry weight yieldse1
- Direction
- increasede1
- Value
- up to 8 timese1
- Qualifier
- Following two growing seasonse1
- Comparator
- control groupe1
- Setting
- NE Germanye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Following two growing seasons, it was observed that the total dry weight yields of the black locust seedlings were increased strongly by up to 8 times when compared to the control group, particularly when TSP was applied through banding”
e2“situated in NE Germany”
Claim · model-written summary
P fertilisation did not affect the biomass yield of six-year-old black locust trees.
- Taxon
- black locustRobinia pseudoacaciae3
- Organ / stage
- six-year-olde3
- Treatment
- P fertilisatione3
- Outcome
- biomass yielde3
- Direction
- did not affecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“P fertilisation, however, did not affect the biomass yield of six-year-old black locust trees”
Claim · model-written summary
P fertilisation significantly increased P concentration in black locust leaves among treatments of both sites.
- Taxon
- black locustRobinia pseudoacaciae5
- Treatment
- P fertilisatione3
- Outcome
- P concentration in leavese4
- Direction
- increasede4
- Qualifier
- among treatments of both sitese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“P fertilisation, however, did not affect the biomass yield of six-year-old black locust trees”
e4“P concentration in leaves among treatments of both sites was still significantly increased and sufficient from a quantity upwards of 60 kg P ha-1”
e5“a comparably moderate amount of P fertiliser (60 kg ha-1) had a strong impact on P uptake and growth performance in the examined black locust seedlings”
Claim · model-written summary
P concentration in black locust leaves is sufficient from a quantity upwards of 60 kg P ha-1.
- Taxon
- black locustRobinia pseudoacaciae5
- Outcome
- P concentration in leavese4
- Qualifier
- sufficient from a quantity upwards of 60 kg P ha-1e4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“P concentration in leaves among treatments of both sites was still significantly increased and sufficient from a quantity upwards of 60 kg P ha-1”
e5“a comparably moderate amount of P fertiliser (60 kg ha-1) had a strong impact on P uptake and growth performance in the examined black locust seedlings”
Claim · model-written summary
A moderate P fertiliser amount of 60 kg ha-1 had a strong impact on P uptake and growth performance of black locust seedlings.
- Taxon
- black locustRobinia pseudoacaciae5
- Organ / stage
- seedlingse5
- Treatment
- P fertiliser (60 kg ha-1)e5
- Outcome
- P uptake and growth performancee5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“a comparably moderate amount of P fertiliser (60 kg ha-1) had a strong impact on P uptake and growth performance in the examined black locust seedlings”
Claim · model-written summary
The authors recommend that a moderate 60 kg P ha-1 fertiliser amount can improve current fertilisation practices for black locust SRC plantations.
- Taxon
- black locustRobinia pseudoacaciae6
- Outcome
- fertilisation practicese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“reveals a high potential to improve the current fertilisation practices for SRC black locust plantations”
The same questions in other papers
fertilization · yield · Robinia pseudoacacia (black locust)Positive and negative results
2 in the opposite direction
- positive
- positive
fertilization · growth · Robinia pseudoacacia (black locust)Positive and negative results
4 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- no effect
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.