Assessment of total and available heavy metal contents in vineyards managed under different agriculture practices

• DOI: 10.5194/egusphere-egu2020-20543
• Publication Date: 2020-03-10T05:50:03Z
• Authors: Adelcia Veiga; Carla Carla Ferreira; Anne-Karine Boulet; Ana Caetano; Óscar Gonzalez-Pe...; Nelson Abrantes; Jacob Keizer; António Ferreira
• Keywords: Vineyard; Soil Quality

<p>Land degradation is a major challenge, particularly in intensive agriculture areas such as typical vineyards. Soil contamination with heavy metals widespread phenomenon vineyards, due to the use of pesticides, fertilizers, manure and slurry. As result, vineyard soils have accumulated other trace elements that may be phytotoxic, non-biodegradable persistent, which represents long term threat crop system food chain. In Portugal, area fourth largest Europe (178770 ha), being one most relevant crops. Different approaches, as, environmental programs innovative management practices been adopted over last years, order minimize soil by metals. However, establishment quality standards for are mainly based on their total content, insufficient estimate potential risk. The toxicity does not depend only concentration, but rather availability. Nevertheless, knowledge “bioavailable fraction” soils, still limited. This study, developed under iSQAPER research project, aims assess available metal content vineyards managed different practices: (1) no tillage, (2) integrated production, (3) conventional farming. production farming study sites intensively more than 5 30 years tillage vineyard.  was performed 2018, sampling before after pesticide application (April July, respectively). samples were also analyzed pH, organic matter (SOM), (DTPA-extractable) (Cu, Cd, Cr, Pb, Zn Ni). Preliminary results show higher Cu, Cr Ni farms practices. Cupper highest concentrations, Cu-based fungicides. led levels Cu above standards. Moreover, similar contents observed no- SOM favored accumulation topsoil layer Higher matter, found no-tillage practices, 2.6%, 1.3% 1.2%, respectively. Understanding bioavailable fraction crucial plants, animals humans. assessment best agricultural key factor mitigate land vineyards.   </p>