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A Green Solution for the Rehabilitation ofMarginal Lands: The Case of Lablab purpureus (L.) Sweet Grown in Technosols
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Orientador(es)
Resumo(s)
Reclamation of abandoned mining areas can be a potentially viable solution to tackle three
major problems: waste mismanagement, environmental contamination, and growing food demand.
This study aims to evaluate the rehabilitation of mining areas into agricultural production areas using
integrated biotechnology and combining Technosols with a multipurpose (forage, food, ornamental
and medicinal) drought-resistant legume, the Lablab purpureus (L.) Sweet. Two Technosols were
prepared by combining gossan waste (GW) from an abandoned mining area with a mix of low-cost
organic and inorganic materials. Before and after plant growth, several parameters were analysed,
such as soil physicochemical characteristics, nutritional status, bioavailable concentrations of potentially
hazardous elements (PHE), soil enzymatic activities, and development and accumulation of
PHE in Lablab, among others. Both Technosols improved physicochemical conditions, nutritional
status and microbiological activity, and reduced the bioavailability of most PHE (except As) of GW.
Lablab thrived in both Technosols and showed PHE accumulation mainly in the roots, with PHE
concentrations in the shoots that are safe for cattle and sheep consumption. Thus, this is a potential
plant that, in conjunction with Technosols, constitutes a potential integrated biotechnology approach
for the conversion of marginal lands, such as abandoned mining areas, into food-production areas.
Descrição
Palavras-chave
environmental rehabilitation food production designed Technosols gossan wastes phytoremediation waste valorisation soil enzymatic activities potentially hazardous elements forgotten crops postmining areas
Contexto Educativo
Citação
Aguilar-Garrido, A.; Reyes-Martín, M.P.; Vidigal, P.; Abreu, M.M. A Green Solution for the Rehabilitation of Marginal Lands: The Case of Lablab purpureus (L.) Sweet Grown in Technosols. Plants 2023, 12, 2682
Editora
MDPI