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| Titel |
Influence of age and composition of shelterbelts plants on enzyme activity and auxine - phytophormone IAA concentrations in soils |
| VerfasserIn |
Lech Wojciech Szajdak, Wioletta Gaca, Teresa Meysner, Katarzyna Styła, Victoria Maryganova |
| 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 |
250038419
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| Zusammenfassung |
| The investigations were carried out in Dezydery Chlapowski Agroecological Landscape Park
in Turew (40 km South-West of Poznań, West Polish Lowlands, 16Ë 45 E and 52Ë 01 N). The
soil samples were taken from two shelterbelts differing the age and the composition of trees.
First 200-years-old shelterbelt is consisting mainly by Robinia pseudacacia and small
admixture of Quercus robur and Larix deciduas. It has 2 kilometers of length and 36 meters
of width. The second one new shelterbelt (many species) was created in 1993 and
consists of several species of plants such as: Quercus pertraea and Quercus robur,
Larix decidua, Pinus silvestris, Sorbus aucuparia, Sorbus intermedia and Tilia
cordata. Its length is 340 meters and its width is 17.5 meters. All shelterbelts and
adjoining cultivated fields were introduced on Hapludalfs soils (according to FAO
classification).
In soil under two shelterbelts and adjoining cultivated fields the activity of the following
enzymes nitrate reductase, urease, xanthine oxidase, phenol oxidase, peroxidase activity were
measured. In addition, the concentrations of iron ions, indole-3-acetic acids, total
organic carbon, dissolved organic carbon, total nitrogen, ammonium and nitrates were
determined.
In soils under shelterbelts compared to adjoining cultivated fields higher content of
organic matter was observed, because the accumulation of soil organic matter under
shelterbelts is suggested to be the main mechanism of long-term withdrawal of various
chemical elements from cycling in the agroecosystems. However, many chemical,
biochemical, physical and biological processes control conversions of organic compounds in
soils and finally these processes depend on the organic matter content and particularly on
humic substances. Due to a very good developed root system of trees in shelterbelts than
cultivated plants, they transpire more than 34% water than cultivated fields and
intensively take up nutrients and finally improve quality of ground and surface
water.
The acidity of the soil under the 200-years-old shelterbelt was the highest and during the
entire vegetation season pH ranged from 3.19 to 3.51, while for the soil of adjoining
cultivated field pH values were much higher (5.03-5.65). However, there are not much
differences between pH of the soil under young shelterbelt (created in 1993) and the soil of
adjoining cultivated field (3.73-5.25 and 3.72-4.15, respectively).
The activities of enzymes and all chemical compounds were the highest in soil under
200-years-old shelterbelt than in soil under young shelterbelt and two adjoining cultivated
fields to both shelterbelts. |
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