Please use this identifier to cite or link to this item:https://hdl.handle.net/20.500.12259/103471
Type of publication: research article
Type of publication (PDB): Straipsnis recenzuojamoje užsienio tarptautinės konferencijos medžiagoje / Article in peer-reviewed foreign international conference proceedings (P1d)
Field of Science: Miškotyra / Forestry (A004)
Author(s): Armolaitis, Kęstutis;Raguotis, Algimantas;Zenkovaitė, Jūratė
Title: Acidification and alkalization of forest litters in Lithuania: effect on denitrification and nitrification
Is part of: Contributed Papers: 3rd International Nitrogen Conference, October 12-26, 2004, Nanjing, China Monmouth Junction, NJ : Science Press USA, 2005
Extent: p. 206-210
Date: 2005
Keywords: Acidification and alkalization;Dentrification and nitrification;Forest litter;Lithuania;Scots pine stands
ISBN: 1933100109
Abstract: The acidification and alkalization of forest soils, mainly in Scots pine (Pinus sylvestris L.) stands, clearly attributable to air pollution in Lithuania are observed in the vicinity of large industrial pollution sources. Chemical changes in forest litters are the most significant. As a consequence, the number of micro-organisms (mainly bacteria), that control the rate of denitrification and nitrification, is influenced. The impact of acidification on these processes was studied near the nitrogen fertilisers plant JV “Achema”. When at this location annual total nitrogen deposition had exceeded 90–120 kg ha-1 and sulphur 60–150 kg ha-1, the acidity of forest litter was pHKCl 3.4–3.8. As a result, the decrease in a number of nitrifiers up to about 2 times and the increase of the denitrifiers – up to 2–3 times was detected. The impact of alkalization was investigated in the vicinity of the cement plant JV “Akmenes cementas”. Here, due to the high cement dust emissions (annual wet deposition of Ca2+ and Mg2+ = 60–230 kg ha-1), alkalization of forest litters by 2.6–3.3 pHKCl up to pHKCl 6.3–7.0 was found. In contrast to the former case, the number of nitrifiers did not change here, while the number of denitrifiers, despite the low nitrogen deposition (10–15 kg ha-1 per year), had increased even by 30–60 times. The paper concludes that the alkalization significantly influences the abundance of the denitrifiers in forest litters
Internet: https://hdl.handle.net/20.500.12259/103471
Affiliation(s): Lietuvos miškų institutas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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