10.6084/m9.figshare.5644741.v1 Julierme Zimmer Barbosa Julierme Zimmer Barbosa Giovana Clarice Poggere Giovana Clarice Poggere Maristela Dalpisol Maristela Dalpisol Beatriz Monte Serrat Beatriz Monte Serrat Simone Bittencourt Simone Bittencourt Antonio Carlos Vargas Motta Antonio Carlos Vargas Motta Alkalinized sewage sludge application improves fertility of acid soils SciELO journals 2017 Sanitation waste liming phosphorus recovery nutrient source organic matter. 2017-11-29 12:11:42 Dataset https://scielo.figshare.com/articles/dataset/Alkalinized_sewage_sludge_application_improves_fertility_of_acid_soils/5644741 <div><p>ABSTRACT Although it is known that alkalinized sewage sludge raises the pH of acid soils, there is limited knowledge regarding its effects on other soil fertility indicators, such as P and K availability and soil organic C content. Thus, the goal of this study was to evaluate how the application of alkalinized sewage sludge affects the fertility of acid soil. Twenty sewage treatment plants were selected throughout ParanĂ¡ State (Brazil), and samples of alkalinized sewage sludge and samples of the most representative agricultural soil of the region were collected (covering soils with medium, clayey or very clayey texture). Each soil was incubated for 60 days with doses of sewage sludge (0, 10, 20, 40, and 80 Mg ha-1) from its region and equivalent doses of limestone. The alkalinized sewage sludge was superior to limestone in the correction of soil acidity (pH, Al3+, and H + Al3+) and P and Ca2+ availability. The sludge also increased Mg2+ availability in all soils, K+ in seven soils and organic C in three soils. The very clayey soils (higher buffering capacity) supported higher sludge doses than did clayey and medium texture soils. The alkalinized sewage sludge application in acid soils proved to be an interesting alternative to recycling this type of waste, because it improved soil fertility and could reduce costs associated with soil management and crop fertilization.</p></div>