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| Titel |
Impact of shelterbelts of different age on the content of nitrates and phosphates in ground water |
| VerfasserIn |
Renata Jaskulska, Lech Wojciech Szajdak |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250034940
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| Zusammenfassung |
| The investigations were carried out in the Agroecological Landscape Park situated 40 km
South-West of Poznań in the upper Obra River watershed, Poland. The arable land constitutes
70%, shelterbelts and small afforestations about 14% and meadows and pastures about
12%.
Shelterbelts belong to very efficient biogeochemical barriers. They decrease the migration
of chemical compounds between ecosystems. The direction of ground water flow was from
the adjoining cultivated field towards shelterbelts.
Two shelterbelts of different humus guantity in surface layer soils were investigated. The
age and species composition of plant was taken under consideration.
The first one is 160-year-old shelterbelt, where predominant species is Robinia
pseudoacacia, Quercus rober and Alnus glutinosa and is characterized by a well-developed
humus level. The other one is 14-year-old shelterbelt. It includes 13 species of trees (Quercus
petrea, Larix deciduas, Pinus silvestri, Populus nigra, Sorbus aucuparia) and reveals a small
amount of humus.
The soils are minerals, grey-brown podzolic in surface layer soils compound from light
loamy sands and weakly loamy sands.
The contents of N-NO3-, P-PO4-3, were investigated in the ground water under
shelterbelts and adjoining cultivated fields. In addition, cationic sorptive capacity, specific
surface areas, TOC were determined in soils.
The smallest concentrations of nitrates (3.35 mg-
l-1) and phosphates (0.02 mg-
l-1) were
observed in ground water under the 160-year-old shelterbelt.
The physicochemical properties of soils under 160-year-old shelterbelt: specific surface
areas (20.3 m2-
g-1), cationic sorptive capacity (24.8 cmol(+)-
kg-1), TOC (4.3%) was higher
than in 14-year-old shelterbelt and in adjoining cultivated fields.
The results revealed, that the 160-year-old shelterbelt characterizing developed humus
more effectively than 14-year-old shelterbelt decreases the amounts of chemical compounds
in ground water and sufficiently fulfils the function such as biogeochemical barrier in
agricultural landscape.
This work was supported by a grant No. N N305 229535 founded by Polish Ministry of
Education. |
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