Dignac, MF; Kögel-Knabner, I; Michel, K; Matzner, E; Knicker, H: Chemistry of soil organic matter as related to C : N in Norway spruce forest (Picea abies (L.) Karst.) floors and mineral soils, Journal of Plant Nutr. Soil Sci., 165, 281-289 (2002)
Abstract:
Due to high nitrogen deposition in central Europe, the C : N ratio of litter and the forest floor has narrowed in the past. This may cause changes in the chemical composition of the soil organic matter. Here we investigate the composition of organic matter in Oh and A horizons of 15 Norway spruce soils with a wide range of C : N ratios. Samples are analyzed with solid-state 13C nuclear magnetic resonance (NMR) spectroscopy, along with chemolytic analyses of lignin, polysaccharides, and amino acid-N. The data are investigated for functional relationships between C, N contents and C : N ratios by structural analysis. With increasing N content, the concentration of lignin decreases in the Oh horizons, but increases in the A horizons. A negative effect of N on lignin degradation is observed in the mineral soil, but not in the humus layer. In the A horizons non-phenolic aromatic C compounds accumulate, especially at low N values. At high N levels, N is preferentially incorporated into the amino acid fraction and only to a smaller extent into the non-hydrolyzable N fraction. High total N concentrations are associated with a higher relative contribution of organic matter of microbial origin.
Aktuelle Termine




BayCEER-Kolloquium:
Do. 30.01.2020
BayCEER Mitgliederversammlung
Geographisches Kolloquium:
Di. 28.01.2020
Adivasis in the Anthropocene - What an Environmental History of Eastern India can tell us about the global agricultural and food crisis
Naturwissenschaftliche Gesellschaft Bayreuth:
Mo. 27.01.2020
Das Insekten- und Vogelsterben vor dem Hintergrund der Natur- und Kulturlandschaftsgeschichte – und wie wir es überwinden können
Ökologisch-Botanischer Garten:
So. 02.02.2020
Mehr als Sonne und Strand: Pflanzen der Karibik
SFB Mikroplastik:
Mo. 27.01.2020
Wissenschaftskommunikation: Nachhaltigkeit und Mikroplastik
BayCEER Blog
13.01.2020
Why Science Communication?
24.05.2019
Stoichiometric controls of C and N cycling
07.05.2019
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
07.05.2019
EGU – interesting research and free coffee
RSS Blog als RSS Feed
Wetter Versuchsflächen
Luftdruck (356m): 984.4 hPa
Lufttemperatur: -5.5 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 0.5 km/h
Wind (Max.): 1.4 km/h
Windrichtung: NW

...mehr
Globalstrahlung: -1 W/m²
Wind (Höhe 32m): 7.3 km/h

...mehr
Diese Webseite verwendet Cookies. weitere Informationen