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Related Experiment Videos

Trace elements in agroecosystems and impacts on the environment.

Zhenli L He1, Xiaoe E Yang, Peter J Stoffella

  • 1MOE Key Lab, Environment Remediation and Ecosystem Health, College of Natural Resources and Environmental Sciences, China Zhejiang University, Huajiachi Campus, Hangzhou 310029, China. zhe@mail.ifas.ufl.edu

Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)
|December 6, 2005
PubMed
Summary
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Trace elements are vital for plant growth but can be toxic at high levels. Soil contamination from human activities poses risks, necessitating better diagnostic tools and remediation strategies for agroecosystems.

Area of Science:

  • Agricultural Science
  • Environmental Chemistry
  • Soil Science

Background:

  • Trace elements are essential micronutrients for plants (e.g., copper, zinc) but can be toxic heavy metals at elevated concentrations.
  • Some trace elements are vital for animal and human health but not plants, while others are environmental contaminants.
  • Agroecosystem trace elements originate from soil parent material or human inputs, with widespread contamination from fertilizers and amendments.

Purpose of the Study:

  • To review the roles of trace elements in agroecosystems.
  • To discuss sources and chemical processes affecting trace element bioavailability and mobility in soils.
  • To highlight challenges in managing trace element deficiency and toxicity, and explore potential solutions.

Main Methods:

Related Experiment Videos

  • Literature review on trace element behavior in soils.
  • Analysis of chemical processes like precipitation-dissolution, adsorption-desorption, and complexation.
  • Examination of the impact of trace elements on soil microorganisms as indicators.

    • Main Results:

    • Both deficiency and toxicity of trace elements occur in agroecosystems, impacting crop production.
    • Soil microbial biomass, activity, and community structure are sensitive indicators of metal contamination.
    • Phytoremediation shows promise for cost-effective remediation of metal-contaminated soils.

    Conclusions:

    • Managing trace element balance in agroecosystems is crucial.
    • Developing reliable soil parameters for diagnosing trace element status is needed.
    • Further research should quantify trace metal transport within and from agroecosystems.