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Plant Breeding and Biotechnology01:59

Plant Breeding and Biotechnology

Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.

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Trace elements in wild grasses: a phytoavailability study on a remediated field.

P Burgos1, A Pérez-de-Mora, P Madejón

  • 1Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, Apartado 1052, Sevilla 41080, Spain.

Environmental Geochemistry and Health
|February 7, 2008
PubMed
Summary

This study evaluated soil amendments for trace element bioavailability. Calcium chloride (CaCl2) extraction effectively predicted trace element uptake in plants, unlike ethylenediaminetetraacetic acid (EDTA).

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Area of Science:

  • Environmental Science
  • Soil Science
  • Ecotoxicology

Background:

  • Soil contamination by trace elements poses risks to ecosystems and human health.
  • Predicting trace element bioavailability is crucial for effective soil remediation strategies.
  • The Aznalcóllar mine spill resulted in soils moderately contaminated with trace elements.

Purpose of the Study:

  • To assess the effectiveness of soil amendments in reducing trace element bioavailability.
  • To compare the efficacy of calcium chloride (CaCl2) and ethylenediaminetetraacetic acid (EDTA) extractions in predicting trace element uptake by plants.
  • To evaluate trace element concentrations in soil and vegetation over two years following amendment application.

Main Methods:

  • Field plot experiment with four treatments: three amendments (biosolid compost, sugar beet lime, leonardite plus sugar beet lime) and a control.
  • Extraction of bioavailable trace elements (As, Cd, Cu, Pb, Zn) using 0.01 M CaCl2 and 0.05 M EDTA.
  • Analysis of trace element concentrations in two plant species (Lamarckia aurea, Poa annua, Bromus rubens) over two consecutive years.

Main Results:

  • Amendments significantly reduced trace element concentrations in plants compared to the control.
  • CaCl2 extraction showed a positive correlation with plant trace element concentrations for Cd, Cu, and Zn.
  • EDTA extraction demonstrated a poor correlation with plant trace element concentrations.

Conclusions:

  • Soil amendments are effective in mitigating trace element bioavailability in contaminated soils.
  • 0.01 M CaCl2 extraction is a more suitable method than EDTA for predicting trace element bioavailability in grasses like Lamarckia aurea in this specific contaminated soil.
  • The findings provide valuable insights for developing reliable methods for assessing soil trace element bioavailability and guiding remediation efforts.