Trace element availability in a sewage sludge-amended cotton grown Mediterranean soil

Long-term field investigations on the use of biosolids are scarce in the Mediterranean region, especially on non-food high-profit crops. Thus we studied the effects of repeated sludge application for 4 yr on trace element (both essential and non-essential) availability to cotton, by applying sludge...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2010-09, Vol.80 (11), p.1308-1313
Main Authors: Antoniadis, V., Tsadilas, C.D., Samaras, V.
Format: Article
Language:English
Subjects:
Applied sciences
Availability
Biodegradation, Environmental
Cadmium - analysis
Cadmium - metabolism
Climate
Coefficients
Copper - analysis
Copper - metabolism
Cotton
Crops
Elevated
Environmental Monitoring
Exact sciences and technology
Gossypium - metabolism
Greece
Heavy metals
Lead - analysis
Lead - metabolism
Manganese - analysis
Manganese - metabolism
Nickel - analysis
Nickel - metabolism
Organic matter
Plant Leaves - metabolism
Pollution
Sewage
Sewage - chemistry
Sludge
Soil (material)
Soil Pollutants - analysis
Soil Pollutants - metabolism
Trace elements
Trace Elements - analysis
Trace Elements - metabolism
Transfer coefficient
Zinc - analysis
Zinc - metabolism
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Summary:Long-term field investigations on the use of biosolids are scarce in the Mediterranean region, especially on non-food high-profit crops. Thus we studied the effects of repeated sludge application for 4 yr on trace element (both essential and non-essential) availability to cotton, by applying sludge at four increasing rates up to 50 Mg ha −1. Although sludge had low metal concentrations, sludge-added trace element availability (assessed with soil-to-plant transfer coefficient) was higher in the first year compared to those in the subsequent years of experiment, but it decreased with time to the value of the unamended control. This shows that trace element mobility can be reduced within a time-scale of a few years, provided soils have a relatively sufficient retention capacity (high CEC, clay, and non-acidic pH) and applied sludge has low heavy metal content. We also found that sludge-borne organic matter greatly affected metal availability, since metal transfer coefficients decreased with elevated organic matter content.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2010.06.047