Microbial biomass dynamics during the decomposition of glucose and maize in metal-contaminated and non-contaminated soils

1991 ◽  
Vol 23 (10) ◽  
pp. 917-925 ◽  
Author(s):  
K. Chander ◽  
P.C. Brookes
Keyword(s):  
Microbial Biomass ◽  
Contaminated Soils ◽  
Biomass Dynamics

scholarly journals Microbial biomass dynamics after addition of EDTA into heavy metal contaminated soils

2009 ◽  
Vol 55 (No. 12) ◽  
pp. 544-550 ◽  
Author(s):  
G. Mühlbachová
Keyword(s):  
Heavy Metal ◽  
Microbial Biomass ◽  
Contaminated Soils ◽  
Soil Microorganisms ◽  
Organic Substrate ◽  
Microbial Biomass C ◽  
Microbial Activities ◽  
Arable Soils ◽  
Microbial Properties ◽  
Biomass Dynamics

An incubation experiment with addition of EDTA and alfalfa into soils contaminated with heavy metal over 200 years was carried out in order to evaluate the EDTA effects on microbial properties. Alfalfa was added to soils together with EDTA to examine its abilities to improve microbial activities affected by EDTA. The obtained results showed that the addition of EDTA led to a significant decrease of microbial biomass C during the first 24 days of incubation. At the end of the experiment the microbial biomass C significantly increased quite close to the original level. The EDTA amendment caused, probably due to the toxic effects, a significant increase in respiratory activities and of the metabolic quotient <i>q</i>CO<sub>2</sub>. An addition of alfalfa significantly improved the microbial biomass C contents in arable soils treated together with EDTA. Both, respiratory activities and <i>q</i>CO<sub>2</sub> significantly increased after the soil treatment with EDTA together with alfalfa. EDTA alone decreased the microbial biomass, alfalfa alone as organic substrate was mineralised and utilised by soil microorganisms for their metabolism.

Temperature effects on organic matter and microbial biomass dynamics in temperate and tropical soils

1998 ◽  
Vol 30 (10-11) ◽  
pp. 1309-1315 ◽  
Author(s):  
B. Grisi ◽  
C. Grace ◽  
P.C. Brookes ◽  
A. Benedetti ◽  
M.T. Dell'abate
Keyword(s):  
Organic Matter ◽  
Microbial Biomass ◽  
Temperature Effects ◽  
Tropical Soils ◽  
Biomass Dynamics

Mineralization and Microbial Biomass Dynamics During Decomposition of Four Leguminous Residues

2007 ◽  
Vol 7 (4) ◽  
pp. 632-637 ◽  
Author(s):  
M. Fosu ◽  
Ronald F. Kuhne . ◽  
Paul L.G. Vlek .
Keyword(s):  
Microbial Biomass ◽  
Biomass Dynamics

scholarly journals The availability of Cd, Pb and Zn and their relationships with soil pH and microbial biomass in soils amended by natural clinoptilolite

2011 ◽  
Vol 51 (No. 1) ◽  
pp. 26-33 ◽  
Author(s):  
G. Mühlbachová ◽  
T. Šimon ◽  
M. Pechová
Keyword(s):  
Heavy Metal ◽  
Microbial Biomass ◽  
Contaminated Soils ◽  
Metal Availability ◽  
Maximum Increase ◽  
Glucose Addition ◽  
Soil Microbial ◽  
Significant Relationships ◽  
Metal Contents ◽  
Natural Clinoptilolite

The relationships among soil microbial biomass, pH and available of heavy metal fractions were evaluated in longterm contaminated soils during an incubation experiment with the amendment of zeolite (natural clinoptilolite) and the subsequent addition of glucose. The values of pH after the addition of glucose decreased during the first day of incubation approximately at about one unit and corresponded with the maximum increase of microbial biomass. The available heavy metal contents extracted by H<sub>2</sub>O, 1 mol/l NH<sub>4</sub>NO<sub>3</sub> and 0.005 mol/l DTPA increased during the first two days of incubation. Only a few significant relationships were found between the available metal contents and pH or microbial biomass. This fact could be ascribed to the different dynamics of the microbial biomass, pH and metal availability after glucose addition, when the highest metal contents during the incubation were usually reached one day later in respect to the greatest changes of pH and microbial activity. In comparison to soils without zeolite addition, the variants with natural clinoptilolite showed lower heavy metal contents in all used extractants with the exception of Cd which in H<sub>2</sub>O extracts tended to increase.

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