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Decrease in soil microbial activity and biomasses owing to nitrogen amendments

Söderström, Bengt LU ; Bååth, Erland LU and Lundgren, B. (1983) In Canadian Journal of Microbiology 29(11). p.1500-1506
Abstract
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... (More)
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. (Less)
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Contribution to journal
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published
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in
Canadian Journal of Microbiology
volume
29
issue
11
pages
1500 - 1506
publisher
National Research Council Canada
ISSN
0008-4166
language
English
LU publication?
yes
id
665dfd71-feac-4f21-9502-c40991e83ec8 (old id 2226481)
date added to LUP
2012-01-09 13:03:31
date last changed
2016-04-15 18:55:24
@article{665dfd71-feac-4f21-9502-c40991e83ec8,
  abstract     = {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.},
  author       = {Söderström, Bengt and Bååth, Erland and Lundgren, B.},
  issn         = {0008-4166},
  language     = {eng},
  number       = {11},
  pages        = {1500--1506},
  publisher    = {National Research Council Canada},
  series       = {Canadian Journal of Microbiology},
  title        = {Decrease in soil microbial activity and biomasses owing to nitrogen amendments},
  volume       = {29},
  year         = {1983},
}