Potencial da escória silicatada na correção da acidez do solo em plantio direto

• Ano de defesa: 2009
• Autor(a) principal: Santos, Vinicius de Moura
• Orientador(a): Souza, Caetano Marciano de
• Banca de defesa: Carneiro, José Eustáquio de Souza , Souza, Moacil Alves de , Pires, Fábio Ribeiro
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Fitotecnia
• Departamento: Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
• País: BR
• Palavras-chave em Português: Escória siderúrgica; Plantio direto; Correção da acidez
• Palavras-chave em Inglês: Siderurgy slag; Tillage; Acidity correction
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO::MANEJO E CONSERVACAO DO SOLO
• Link de acesso: http://locus.ufv.br/handle/123456789/4508

The soil acidity correction under no-tillage systems is a barrier to be beaten in agriculture. The slag, 6,8 times more soluble than lime, could, because of its better solubility, dislocate in deeper soil layers and correct soil acidity there. This work had as objectives to evaluate the mobility in the soil layers of slag in a comparison with lime under no-tillage and to verify the influence of both of them on corn and wheat yield and to assess the leaf diseases severity of corn. This experiment was installed on a 20 years old no-tillage area. It was carried out in a randomized block design, with 4 blocks and 3 treatments, consisted of slag and lime application and a control without application. Correctives mobility evaluation was made with a subplot of the treatments in soil layers and dates. The slag was more efficient than lime in increasing pH and Ca2+ concentration and reducing Al3+ concentration in soil layers. Besides the promotion of improvement in soil attributes related to acidity faster than lime, slag improved significantly pH at the 15 to 20 cm soil layer at 180 days after the products application. Lime was efficient in improve pH only at no more than the 10 to 15 cm layer, even 360 days after the products application. The corn and wheat yield was not influenced by the soil acidity correction, neither by the corrective used. The silicon application by the slag did not reduce the leaf diseases severity in corn. Slag is more efficient to correct soil acidity in deep soil layers than lime under no-tillage.