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Effect of nitrogen and carbon supply on the development of soil organism populations and pine seedlings - microcosm experiment

Bååth, Erland LU ; Lohm, U.; Lundgren, B.; Rosswall, T.; Söderström, Bengt LU ; Sohlenius, B. and Wiren, A. (1978) In Oikos 31(2). p.153-163
Abstract
Series of pots containing Scots pine seedlings and a humus-sand mixture were watered twice weekly for 398 d with different nutrient solutions (control treatment with complete plant nutrient solution less nitrogen; glucose addition; nitrogen addition; glucose and nitrogen addition). Analyses were made of organic and nitrogen contents in the substrate, plant weights and nitrogen contents, nitrogen fixation and respiration rates, abundance, biomass and in some cases species composition of different soil organism populations.

The growth rate of pine seedlings was lowest in series supplied with glucose, which is most easily explained by a deficiency of nitrogen due to microbial immobilization. The fungi and yeast were stimulated by... (More)
Series of pots containing Scots pine seedlings and a humus-sand mixture were watered twice weekly for 398 d with different nutrient solutions (control treatment with complete plant nutrient solution less nitrogen; glucose addition; nitrogen addition; glucose and nitrogen addition). Analyses were made of organic and nitrogen contents in the substrate, plant weights and nitrogen contents, nitrogen fixation and respiration rates, abundance, biomass and in some cases species composition of different soil organism populations.

The growth rate of pine seedlings was lowest in series supplied with glucose, which is most easily explained by a deficiency of nitrogen due to microbial immobilization. The fungi and yeast were stimulated by addition of an easily available carbon source whereas the bacteria needed both nitrogen and carbon to maintain high biomass. A positive correlation between fungal feeding soil organisms and amount of fungal mycelium was found while a more complex situation prevailed with regard to bacterial numbers and bacterial feeding nematodes. The systems are evaluated in relation to the different treatments and compared with the field situation. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Oikos
volume
31
issue
2
pages
153 - 163
publisher
Wiley-Blackwell
ISSN
1600-0706
language
English
LU publication?
yes
id
c4533669-fe1b-428a-a55f-eeee5c501c2c (old id 2226579)
alternative location
http://www.jstor.org/stable/3543558
date added to LUP
2011-12-21 16:38:35
date last changed
2016-04-15 18:45:07
@article{c4533669-fe1b-428a-a55f-eeee5c501c2c,
  abstract     = {Series of pots containing Scots pine seedlings and a humus-sand mixture were watered twice weekly for 398 d with different nutrient solutions (control treatment with complete plant nutrient solution less nitrogen; glucose addition; nitrogen addition; glucose and nitrogen addition). Analyses were made of organic and nitrogen contents in the substrate, plant weights and nitrogen contents, nitrogen fixation and respiration rates, abundance, biomass and in some cases species composition of different soil organism populations.<br/><br>
The growth rate of pine seedlings was lowest in series supplied with glucose, which is most easily explained by a deficiency of nitrogen due to microbial immobilization. The fungi and yeast were stimulated by addition of an easily available carbon source whereas the bacteria needed both nitrogen and carbon to maintain high biomass. A positive correlation between fungal feeding soil organisms and amount of fungal mycelium was found while a more complex situation prevailed with regard to bacterial numbers and bacterial feeding nematodes. The systems are evaluated in relation to the different treatments and compared with the field situation.},
  author       = {Bååth, Erland and Lohm, U. and Lundgren, B. and Rosswall, T. and Söderström, Bengt and Sohlenius, B. and Wiren, A.},
  issn         = {1600-0706},
  language     = {eng},
  number       = {2},
  pages        = {153--163},
  publisher    = {Wiley-Blackwell},
  series       = {Oikos},
  title        = {Effect of nitrogen and carbon supply on the development of soil organism populations and pine seedlings - microcosm experiment},
  volume       = {31},
  year         = {1978},
}