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| Titel |
Soil biochemical properties of grassland ecosystems under anthropogenic emission of nitrogen compounds |
| VerfasserIn |
Irina Kudrevatykh, Kristina Ivashchenko, Nadezhda Ananyeva |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250122553
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| Publikation (Nr.) |
 EGU/EGU2016-1614.pdf |
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| Zusammenfassung |
| Inflow of pollutants in terrestrial ecosystems nowadays increases dramatically, that might be
led to disturbance of natural biogeochemical cycles and landscapes structure. Production of
nitrogen fertilizers is one of the air pollution sources, namely by nitrogen compounds (NH4+,
NO3-, NO2-). Air pollution by nitrogen compounds of terrestrial ecosystems might be
affected on soil biochemical properties, which results increasing mineral nitrogen content in
soil, changing soil P/N and Al/Ca ratios, and, finally, the deterioration of soil microbial
community functioning. The research is focused on the assessment of anthropogenic
emission of nitrogen compounds on soil properties of grassland ecosystems in European
Russia. Soil samples (Voronic Chernozem Pachic, upper 10 cm mineral layer, totally 10) were
taken from grassland ecosystem: near (5-10 m) nitrogen fertilizer factory (NFF), and far from
it (20-30 km, served as a control) in Tula region. In soil samples the NH4+ and NO3-
(Kudeyarov’s photocolorimetric method), P, Ca, Al (X-ray fluorescence method)
contents were measured. Soil microbial biomass carbon (Cmic) was analyzed by
substrate-induced respiration method. Soil microbial respiration (MR) was assessed by
CO2 rate production. Soil microbial metabolic quotient (qCO2) was calculated as
MR/Cmic ratio. Near NFF the soil ammonium and nitrate nitrogen contents were a
strongly varied, variation coefficient (CV) was 42 and 86This study was supported
by Russian Foundation of Basic Research Grant No. 14-04-00098, 15-44-03220,
15-04-00915. |
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