Ambiance rose production and nutrient supply in soil irrigated with treated sewage

Abstract

<title>ABSTRACT</title><p>Effluents from secondary sewage treatment plants may contain amount of nutrients with the potential to cause eutrophication of water bodies. One of the ways to decrease this influx of nutrients would be the agricultural reuse. Therefore, the objective of this study was to evaluate the irrigation of roses of the Ambiance variety with the effluent from an anaerobic reactor and an intermittent sand filter (nitrified effluent). The trial lasted for 152 days. The dose of nitrogen applied via effluent was 91% of the crop requirement; of phosphorus, 3.5% (very low); and of potassium, 23%. There was no difference among treatments for the evaluated variables: diameter and length of stem, diameter and length of bud, and fresh weight of flower buds. The production of floral stems was higher in treatments with effluents without conventional fertilization. It is concluded that the irrigation with a treated effluent is an alternative for the fertilization of ambiance roses.</p>

Physical-chemical effects of irrigation with treated wastewater on Dusky Red Latosol soil

“…Soil fertility is evaluated by measuring chemical properties such as pH, organic matter, phosphorus, potassium, calcium, magnesium, aluminum + hydrogen, cation exchange capacity, base saturation and others (Reichardt and Timm, 2004), so it is important to note that the presence of these nutrients in treated wastewater is a problem only when their concentrations are too high once the treated wastewater can be used as a fertilizer supply (Baumgartner et al, 2007;Dantas et al, 2014;Cuba et al, 2015;Gabrielli et al, 2015).…”

Alternativas para o gerenciamento de lodo de sistemas descentralizados de tratamento de esgotos de áreas rurais

“…As principais desvantagens desse sistema são: o risco de contaminação do lençol freático em caso de impermeabilização mal feita; a ocorrência de maus odores e a atração de insetos e animais nocivos à saúde humana (WEF, 1996). Porém, deve-se ter em mente que o lodo possui em sua composição grande quantidade de nutrientes essenciais ao desenvolvimento das plantas, o que lhe confere um grande potencial para uso como fertilizante (Paixão Filho et al, 2014;Gabrielli et al, 2015;Marinho et al, 2013). O uso de lodo na agricultura pode trazer muitos beneoícios, porém a qualidade do lodo para esta oinalidade deve ser bem controlada, para que não ofereça risco à população ou ao meio ambiente (Paixão Filho et al, 2014).…”