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Evaluation of soil respiration characteristics to assess heavy-metal effects on soil-microorganisms using glutamic-acid as a substrate

Nordgren, Anders; Bååth, Erland LU and Söderström, Bengt LU (1988) In Soil Biology & Biochemistry 20(6). p.949-954
Abstract
Computerized continuous monitoring of soil respiration rates before and during glutamic acid decomposition in heavy metal polluted soils was used to determine four microbial parameters: basal respiration rate, substrate induced respiration rate, lag time before the exponential increase of the soil respiration rate and the specific respiration increment during the exponential phase. Both smelter- and laboratory-contaminated soils were studied.



Basal respiration rate was the parameter most inhibited (54–77%) by heavy metal contamination. Increased soil moisture resulted in increased basal respiration rate, irrespective of pollution level. The substrate-induced respiration rate after the addition of glutamic acid was... (More)
Computerized continuous monitoring of soil respiration rates before and during glutamic acid decomposition in heavy metal polluted soils was used to determine four microbial parameters: basal respiration rate, substrate induced respiration rate, lag time before the exponential increase of the soil respiration rate and the specific respiration increment during the exponential phase. Both smelter- and laboratory-contaminated soils were studied.



Basal respiration rate was the parameter most inhibited (54–77%) by heavy metal contamination. Increased soil moisture resulted in increased basal respiration rate, irrespective of pollution level. The substrate-induced respiration rate after the addition of glutamic acid was strongly correlated with the basal respiration rate (r = 0.85−0.95). The change in specific respiration increment was not related to metal contamination but increased with increasing soil moisture, with an optimum at about 250% H2O based on soil organic matter (oven-dried). Lag time was the parameter best correlated with smelter-induced metal contamination (r = 0.64 and 0.75). Unlike the three other parameters, the lag time was unaffected by soil moisture, irrespective of contamination level. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
Soil Biology & Biochemistry
volume
20
issue
6
pages
949 - 954
publisher
Elsevier
external identifiers
  • scopus:0024165042
ISSN
0038-0717
language
English
LU publication?
yes
id
26f89cf0-5327-4004-9433-a580d70d20b5 (old id 2226425)
alternative location
http://www.sciencedirect.com/science/article/pii/0038071788901095
date added to LUP
2012-01-10 16:28:15
date last changed
2017-08-06 03:46:23
@article{26f89cf0-5327-4004-9433-a580d70d20b5,
  abstract     = {Computerized continuous monitoring of soil respiration rates before and during glutamic acid decomposition in heavy metal polluted soils was used to determine four microbial parameters: basal respiration rate, substrate induced respiration rate, lag time before the exponential increase of the soil respiration rate and the specific respiration increment during the exponential phase. Both smelter- and laboratory-contaminated soils were studied.<br/><br>
<br/><br>
Basal respiration rate was the parameter most inhibited (54–77%) by heavy metal contamination. Increased soil moisture resulted in increased basal respiration rate, irrespective of pollution level. The substrate-induced respiration rate after the addition of glutamic acid was strongly correlated with the basal respiration rate (r = 0.85−0.95). The change in specific respiration increment was not related to metal contamination but increased with increasing soil moisture, with an optimum at about 250% H2O based on soil organic matter (oven-dried). Lag time was the parameter best correlated with smelter-induced metal contamination (r = 0.64 and 0.75). Unlike the three other parameters, the lag time was unaffected by soil moisture, irrespective of contamination level.},
  author       = {Nordgren, Anders and Bååth, Erland and Söderström, Bengt},
  issn         = {0038-0717},
  language     = {eng},
  number       = {6},
  pages        = {949--954},
  publisher    = {Elsevier},
  series       = {Soil Biology & Biochemistry},
  title        = {Evaluation of soil respiration characteristics to assess heavy-metal effects on soil-microorganisms using glutamic-acid as a substrate},
  volume       = {20},
  year         = {1988},
}