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| Titel |
Phosphorus kinetics in reclaimed lignite mine soils under short rotation coppices in NE Germany |
| VerfasserIn |
A. Slazak, D. Freese |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250069953
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| Zusammenfassung |
| In Germany, the establishment of short rotation coppices (SRC) for production of woody
chips for bioenergy increased considerably during the last years. In recultivation of mining
sites one of the widely used fast growing tree species is black locust (Robinia pseudoacacia
L.). As a fast growing tree it can be used for biomass and bioenergy production as well as can
improve soil quality. The phosphorus (P) dynamics in new R. pseudoacacia forest stands
would be a reletionship between the tree’s ability to extract P from soil and the soil’s ability
to supply P in bioavailable form. The objectives of our work were to evaluate the influence of
SRC on the P sorption capacities in post lignite mining soils and to investigate the soil
total organic P (Porg) and plant available P under different development stages of
R. pseudoacacia. In the presented sorption experiment, P solutions were reacting
with the soil for a specific period after which the concentration in the solution was
measured and the amount of sorption was calculated. The post-lignite mine soils with
sandy overburden substrate were sampled at three different depths: 0-3, 3-10 and
10-30 cm from different rotation stages of R. pseudoacacia: 2-, 3-, 4-, and 14-years
old plantation (R2, R3, R4, and R14, respectively). The results showed that in the
topsoil P sorption capacities were higher. The oldest site R14 showed the highest
sorption capacity, removing ca. 80 mg P kg-1 and the lowest sorption was found for
the R2/R3 site ca. 25 mg P kg-1. The amount of Porg in the soil increased with
increasing age of R. pseudoacacia in all layers (P |
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