Sammanfattning

This study investigates if anaerobic digestion residues contain substances with negative impact on microbial processes in soil. Effects of residues and organic extracts of residues were assessed with two soil bioassays-substrate induced respiration (SIR) and potential ammonia oxidation (PAO). Laboratory incubations were performed, and residues from two lab-scale digesters and seven full-scale digesters, at different application rates, were mixed into agricultural topsoil. Additions of intact, dried residues displayed negligible effects on SIR and PAO, indicating that total microbial biomass and ammonia oxidising populations (AOB) were not affected by the amendments. However, removal of inorganic and particulate constituents in the residues by the extraction procedure rendered some of them inhibitory to PAO. Thus, substances inhibiting AOB were present in the anaerobic digestion residues, although generally they had minor effects on heterotrophic soil microorganisms. (C) 2003 Elsevier B.V. All rights reserved

Publicerad i

Applied Soil Ecology
2004, Volym: 26, nummer: 2, sidor: 107-112
Utgivare: ELSEVIER SCIENCE BV

SLU författare

• Schnürer, Anna

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

• Sundh, Ingvar

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

• Nyberg, Karin

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Miljö- och naturvårdsvetenskap


Publikationens identifierare

DOI: https://doi.org/10.1016/j.apsoil.2003.12.002

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/5113