Microbial community structure and function in a soil contaminated by heavy metals: effects of plant growth and different amendments

Pérez‐de‐Mora, Alfredo; Burgos, Pilar; Madejón, Engracia; Cabrera, Francisco; Jaeckel, Petra; Schloter, Michael

doi:10.1016/j.soilbio.2005.05.010

Cited by 240 publications

(132 citation statements)

References 73 publications

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“…Although these results were in good agreement with the obtained by other authors with the compost application [23,24] , pH levels (between 5.19 and 5.89) were maintained within slightly acid soils ( Table 2). Due to the little pH modification, it was not found correlation with trace elements bioavailability.…”

Section: Resultssupporting

confidence: 92%

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Microbial Response to the Application of Amendments in a Contaminated Soil with Trace Elements

Branzini¹,

Zubillaga²,

Zubillaga³

2009

American Journal of Environmental Sciences

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Problem Statement:The anthropogenic activities can cause adverse effects in soils, increasing in some situations trace elements contents, impacting negatively both the microbial biomass and activity. Among the practices used for the recovery of soil quality we can find the application of organic amendments or the product of their composting. These can adsorb trace elements decreasing their availability and increasing the soil microbial biomass. The microorganisms of the soil use to be considered as sensitive biological indicators of the changes produced in the soil quality. Approach: One processes to quantify soil biological activity is the respiration. The aim was to evaluate the effects of two organic amendments application on soil microbial activity, in a soil contaminated with copper (Cu), zinc (Zn) and chromium (Cr). To prove the raised aim we quantified CO 2 -C release. Results:The results showed that at the end of the incubation period, as much in contaminated soils as in soils without contamination, the total activity of microorganisms was significantly increased by the application of organic amendments (p = 0.0062 and p = 0.0005, respectively). The application of both composts to slightly acid soils increased the initial and final values of pH. There was no evidence of modification in Electrical Conductivity (EC) because of compost application. At the end of the incubation period a negative relationship was observed between EC and CO 2 -C (R 2 = 0.74, p = 0.0028). Conclusions: The obtained results in this study suggested that it was possible to increase the total activity of soil microorganisms and to reduce the bioavailability of Cu, Cr and Zn in a contaminated soil. As a result, CO 2 -C release is a sensitive index of the soil quality, at least in the experimental conditions of this essay.

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Section: Resultssupporting

confidence: 92%

“…1). It has been reported that in contaminated soils with trace elements, microorganism biomass and activity increased with organic amendments application [24] . The used amendments showed lower levels of trace elements to the considered ones as toxics by different standards [19,20] .…”

Section: Resultsmentioning

confidence: 99%

Microbial Response to the Application of Amendments in a Contaminated Soil with Trace Elements

Branzini¹,

Zubillaga²,

Zubillaga³

2009

American Journal of Environmental Sciences

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“…Addition of these organic amendments to soil is a way of enhancing natural mechanisms such as precipitation, complexation, adsorption and absorption, which reduces the bioavailability of the pollutants (Pérez-de-Mora et al 2007). Moreover, these organic amendments provide a facility to establish plants on polluted soil by binding pollutants, increasing nutrients and stimulating native microbial community (Oldare et al 2011;Zaniewicz-Bajkowska et al 2007;Pérez-de-Mora et al 2006, 2007. The revegetation of metal-contaminated soil could be possible by the application of compost prepared from municipal solid waste Walker et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Organic amendments: effects on cereals growth and cadmium remediation

Ahmad

Akhtar

Zahir

et al. 2014

Int. J. Environ. Sci. Technol.

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Cadmium (Cd) is one of the toxic metals that adversely affect plant growth. Organic amendments may not only enhance nutrient status of soil, but they may also form complexes with Cd and reduce its availability to plants. This experiment was conducted to determine whether organic amendments (compost and biogas slurry) could stabilize/extract Cd and alleviate the adverse effects of Cd on the growth of two cereals, wheat and maize. Organic amendments along with four varying levels of Cd (0, 5, 20, 50 mg kg -1 soil) were prepared with soil. Effect of these amendments on tolerance indices, root/shoot dry biomass, tissue Cd concentration, Cd uptake and translocation were studied. Biogas slurry caused maximum increase in tolerance indices of wheat and maize (100-112 and 117-133 %, respectively, as compared to control), whereas compost caused significant increase in their dry biomass. Negative correlation between root dry biomass of wheat (r = -0.37) and maize (r = -0.53) to Cd revealed its suppressive effects. Dry biomass of plant correlated with organic amendments in wheat (r = 0.83-0.98), whereas weak correlation was observed in maize (r = 0.30-0.40). Compost significantly reduced Cd uptake in wheat and maize; however, it increased Cd translocation in plants. Based on the results of this study, root was the major sink of Cd when soil was amended with or without organic amendments. Biogas slurry removed 97 % Cd from artificially polluted water after 13 h at pH 6. The additions of compost in soil and biogas slurry in wastewater are recommended to stabilize/extract Cd.

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“…Wastewater irrigation, sludge applications, solid waste disposal, automobile exhaust, and industrial waste dumping are the major anthropogenic sources of heavy metals (Khan et al 2008). However, heavy metals could have long-term hazardous impacts on the health of soil ecosystems and adverse influences on soil biological processes (Pérez-de-Mora et al 2006;Wang et al 2007;Bhattacharyya et al 2008). Soil biological characteristics are recognized as bioindicators of soil quality because they are more dynamic and more sensitive than the soil physicochemical properties (Brookes 1995;Hinojosa et al 2004).…”

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confidence: 99%

Effects of Cd and Pb on soil microbial community structure and activities

Khan

Hesham

Qiao

et al. 2009

Environ Sci Pollut Res

330

132

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Background, aim, and scope Soil contamination with heavy metals occurs as a result of both anthropogenic and natural activities. Heavy metals could have long-term hazardous impacts on the health of soil ecosystems and adverse influences on soil biological processes. Soil enzymatic activities are recognized as sensors towards any natural and anthropogenic disturbance occurring in the soil ecosystem. Similarly, microbial biomass carbon (MBC) is also considered as one of the important soil biological activities frequently influenced by heavy metal contamination. The polymerase chain reaction-denaturing gradient gel electrophoresis (DGGE) has recently been used to investigate changes in soil microbial community composition in response to environmental stresses. Soil microbial community structure and activities are difficult to elucidate using single monitoring approach; therefore, for a better insight and complete depiction of the soil microbial situation, different approaches need to be used. This study was conducted in a greenhouse for a period of 12 weeks to evaluate the changes in indigenous microbial community structure and activities in the soil amended with different application rates of Cd, Pb, and Cd/Pb mix. In a field environment, soil is contaminated with single or mixed heavy metals; so that, in this research, we used the selected metals in both single and mixed forms at different application rates and investigated their toxic effects on microbial community structure and activities, using soil enzyme assays, plate counting, and advanced molecular DGGE technique. Soil microbial activities, including acid phosphatase (ACP), urease (URE), and MBC, and microbial community structure were studied. Materials and methods A soil sample (0-20 cm) with an unknown history of heavy metal contamination was collected and amended with Cd, Pb, and Cd/Pb mix using the CdSO 4 and Pb(NO 3 ) 2 solutions at different application rates. The amended soils were incubated in the greenhouse at 25±4°C and 60% water-holding capacity for 12 weeks. During the incubation period, samples were collected from each pot at 0, 2, 9, and 12 weeks for enzyme assays, MBC, numeration of microbes, and DNA extraction. Fumigationextraction method was used to measure the MBC, while plate counting techniques were used to numerate viable heterotrophic bacteria, fungi, and actinomycetes. Soil DNAs were extracted from the samples and used for DGGE analysis. Results ACP, URE, and MBC activities of microbial community were significantly lower (p <0.05) in the metal-amended samples than those in the control. The enzyme inhibition extent was obvious between different incubation periods and varied as the incubation proceeded, and the highest rate was detected in the samples after 2 weeks. However, the lowest values of ACP and URE activities (35.6% and 36.6% of the control, respectively) were found in the Cd 3 /Pb 3 -treated sample after 2 weeks. Similarly, MBC was strongly decreased in both Cd/Pbamended samples and highest reduction (52.4%) was Envir...

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Microbial community structure and function in a soil contaminated by heavy metals: effects of plant growth and different amendments

Cited by 240 publications

References 73 publications

Microbial Response to the Application of Amendments in a Contaminated Soil with Trace Elements

Microbial Response to the Application of Amendments in a Contaminated Soil with Trace Elements

Organic amendments: effects on cereals growth and cadmium remediation

Effects of Cd and Pb on soil microbial community structure and activities

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