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Comparison between a traditional (horse manure) and a non-conventional (cork powder) organic residue in the uptake of potentially toxic elements by lettuce in contaminated soils
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Orientador(es)
Resumo(s)
The use of natural organic correctives is a current agricultural practice that may have advantages
for the production of plants in contaminated soils. Cork powder is a natural sub-product of the cork
industry that has several potential benefits compared to more commonly used soil amendments. In this
work, an evaluation was performed of the use of cork powder (a non-conventional organic residue) and
horsemanure (traditionally used in agriculture) to control the availability of potentially toxic elements in
artificially contaminated soils. Four concentrations were used for each element: Cr (100 to 800 mg kg-1),
Ni (37.5 to 300mg kg-1), Zn (150 to 1200mg kg-1), Cd (1.5 to 12mg kg-1) and Pb (150 to 1200mg kg-1).
The accumulation of these elements in lettuce plants grown in pots under controlled conditions was
evaluated. With the exception of Cd, no significant differences were detected in the absorption of
the different elements by lettuce plants at the studied amounts of correctives applied (1% for cork
powder and 0.5% for horse manure). Cadmium was the element that accumulated most in lettuce.
Cork powder was shown to be less effective than horse manure in controlling the bioavailability
of these elements in the soil. Further tests with chemically modified cork products could improve
its efficiency
Descrição
Palavras-chave
cadmium chromium lead nickel zinc cork horse manure element accumulation lettuce
Contexto Educativo
Citação
Moreira, I.; Leitão, I.; Mourato, M.P.; Martins, L.L. Comparison between a Traditional (Horse Manure) and a Non-Conventional (Cork Powder) Organic Residue in the Uptake of Potentially Toxic Elements by Lettuce in Contaminated Soils. Environments 2021, 8, 45
Editora
ISA