Journalartikel

Jahr der Veröffentlichung: 2009

Seiten: 25-30

Zeitschrift: Applied Soil Ecology

Bandnummer: 42

Heftnummer: 1

ISSN: 0929-1393

DOI Link: https://doi.org/10.1016/j.apsoil.2009.01.004

Verlag: Elsevier

Abstract: 
Application of organic carbon to grassland in the form of manure or cattle slurry during the growing season is a normal agricultural practice. Under enhanced organic C supply changes in the grassland soil's internal N cycling and in the microbial community are expected, in particular, the fungi-bacteria ratio. Here we present novel results from a N-15 tracing study which aimed to investigate the role of fungi and bacteria in N transformations under enhanced organic C supply. We applied N-15 labelled fertiliser to soil in a laboratory incubation with and without acetate addition. Moreover, we used specific microbial inhibitors to selectively inhibit either fungi or bacteria. The data from the incubation were used to calculate gross N transformation rates via N-15 tracing models based on Monte Carlo sampling techniques. Our results show that fungi are the predominant organisms that carry out N transformations in a temperate grassland soil. Under enhanced organic C supply, the stimulation of the mineralization immobilization - turnover and heterotrophic nitrification was predominantly related to fungal activity, indicating that fungi may play an increasingly important role in soils with an enhanced C supply. In addition, we showed that fungi were the dominant organisms for N2O production. Increased fungal activity under enhanced organic C supply may therefore increase N2O emissions from soil and have environmental consequences. (C) 2009 Elsevier B.V. All rights reserved.

Harvard-Zitierstil: Laughlin, R., Rütting, T., Müller, C., Watson, C. and Stevens, R. (2009) Effect of acetate on soil respiration, N2O emissions and gross N transformations related to fungi and bacteria in a grassland soil, Applied Soil Ecology, 42(1), pp. 25-30. https://doi.org/10.1016/j.apsoil.2009.01.004

APA-Zitierstil: Laughlin, R., Rütting, T., Müller, C., Watson, C., & Stevens, R. (2009). Effect of acetate on soil respiration, N2O emissions and gross N transformations related to fungi and bacteria in a grassland soil. Applied Soil Ecology. 42(1), 25-30. https://doi.org/10.1016/j.apsoil.2009.01.004