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


Sandra T. Teixeira, Paulo G. S. Wadt, Daniel V. Perez, Fabiane Bertotti and Christie Klimas.

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 ha¹; 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.


Amazon, Disturbed areas, Fertilization, Soil pollution

Amaz. Jour. of Plant Resear. 1(2): 88-93. October 2017
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