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Decrease in soil microbial activity and biomasses owing to nitrogen amendments

In English

Författare

Summary, in English

Microbial biomass and soil respiration rate decreased after application of 150 kg NH4NO3–N∙ha−1 to different coniferous forest podzols. The decrease was already found 3 months after fertilization and was still evident after 3–5 years. Changes in pH, organic matter, or water content in the soils could not explain the decreases. In laboratory experiments, several unfertilized forest soils were treated with 2 mg of NH4NO3–N or of urea–nitrogen∙g wet soil−1. The ammonium nitrate addition resulted in severe depressions of the respiration rates during and up to 175 days of incubation and the decrease was evident after about 1 week. The urea treatment initially increased the respiration rate of the soils, but this appeared to be a transitory effect.

Publiceringsår

1983

Språk

Engelska

Sidor

1500-1506

Publikation/Tidskrift/Serie

Canadian Journal of Microbiology

Volym

29

Issue

11

Dokumenttyp

Artikel i tidskrift

Förlag

National Research Council Canada

Ämne

  • Biological Sciences

Status

Published

Forskningsgrupp

  • Microbial Ecology

ISBN/ISSN/Övrigt

  • ISSN: 0008-4166