A carregar...
Publicação
Influência de aditivos em solos contaminados com arsénio na produção de hortícolas
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 3.08 MB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
The effects of different amendments on a naturally contaminated soil with arsenic
were studied. Several soil characteristics were analysed and the behaviour of two vegetables
(tomato and Italian parsley), in terms of arsenic absorption and translocation, was examined.
The results indicate differences associated with the availability of arsenic in the soil in the
presence of amendments: iron oxides (3 g kg-1) tend to reduce arsenic availability and
organic matter and calcium phosphates seem to induce the opposite effect. Though both
plant species have been affected by arsenic toxicity, the response relatively to plant
development and growth and to arsenic translocation was different. Tomato plants presented
greater growth when organic matter was used as amendment in terms of height, leaf length,
relative chlorophyll content, dry weight and fruit production. By the contrary, the Italian
parsley growth presented the best growth when calcium phosphate was added to the
contaminated soil. Though none of the plant species was considered as arsenic
accumulators, the Italian parsley tends to translocate more arsenic to their leaves than
tomato plants.
Descrição
Mestrado em Engenharia do Ambiente - Tecnologias Ambientais - Instituto Superior de Agronomia
Palavras-chave
lycopersicon esculentum tomate salsa italian parsley soil contamination contaminação do solo aditivos soil amendments arsenic arsénio toxicidade toxicity