Changes in chemical attributes of soil treated with tannery sludge in Amazonia.

• Autor(a) principal: TEIXEIRA, S. T.
• Data de Publicação: 2017
• Outros Autores: WADT, P. G. S., PEREZ, D. V., BERTOTTI, F., KLIMAS, C.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1088960
• topic: Amazon; Disturbed areas; Fertilization; soil pollution

Application of residuals to soil can favor the development of nutrient-poor agricultural areas. The objective of this study was to evaluate changes in the chemical attributes of soil after application of tannery sludge. The applied treatments were 1) Mineral control: 100 kg N ha-1 , applied in different stages (25% at planting and 75% when plant maize was in the 1.4 development stage); 2) tannery sludge: 50 kg ha ֿ¹; 100 kg ha ֿ¹; 200 kg ha ֿ¹; 400 kg ha ֿ¹; and 600 kg ha ֿ¹ of organic-N. All plots were treated with fertilizer (75 kg ha ֿ¹ P2O5 and 50 kg ha ֿ¹ K2O). In the mineral control, nitrogen was applied in ammonium sulphate form. Soil samples were analyzed to determinate pH, calcium, magnesium and aluminum in 1M KCl solution, potential acidity (hydrogen + aluminum in a calcium acetate solution pH 7), and potassium and sodium in a Mehlich 1 solution. The application of tannery sludge modified the chemical attributes of the soil, increasing pH and Na+ , Ca+2, and Mg+2 contents.