Substrates for seedlings with sewage sludge and biochar 1

• Published in: Revista Ceres Vol. 67; no. 6; pp. 491 - 500
• Main Authors: Monteiro, Alex Becker, Pereira, Ivan dos Santos, Bamberg, Adilson Luis, Stöcker, Cristiane Mariliz, Timm, Luís Carlos
• Format: Journal Article
• Language: English
• Published: Vicosa Universidade Federal de Viçosa-UFV, Revista Ceres 01.11.2020
• Subjects: Aeration; Aluminum; Automatic control; Automation; Bioavailability; Biological activity; Bulk density; Cadmium; Charcoal; Chlorophyll; Chromium; Coliforms; Contaminants; Copper; Eggs; Experiments; Fiberglass; Glass fiber reinforced plastics; Greenhouses; Inorganic contaminants; Iron; Lettuce; Magnesium; Manganese; Mercury; Mercury (metal); Microbial activity; Microorganisms; Molybdenum; Nickel; Nutritional status; pH effects; Porosity; Pyrolysis; Rice; Seedlings; Seeds; Sewage sludge; Soil conditioners; Soil density; Soil properties; Soil quality; Soil structure; Substrates; Viruses; Water storage; Zinc
• ISSN: 0034-737X

Biochar has been widely tested and used as a soil conditioner, since it benefits soil quality overall, in particular soil structure, porosity, bulk density, water storage, microbial activity and nutritional status (Silva et al., 2017). (2016), evaluating SS pyrolysis temperatures ranging from 400 to 600 °C, performed during one hour, verified that with the increase in temperature there is a decrease in SS volume, an increase in pH levels and a decrease in the bioavailability of a wide set of potentially harmful elements, therefore resulting in a lower risk of SS-biochar application to the environment. After collect, SS-solarized was spreaded in 10 cm thick layer in fiberglass boxes, placed inside an agricultural greenhouse made of transparent plastic with automated control of aeration and heating. [...]SS-solarized and SS-biochar used in this study was crushed and sieved until granulometry 100% < 2.0 mm. Samples of SS-solarized were submitted to the characterization of the presence of pathogenic contaminants (thermotolerant coliforms, viable eggs of helminths, salmonella and enteric virus contents), inorganic contaminants (As, Ba, Cd, Pb, Cu, Cr, Cr6, Hg, Mo, Ni, Se and Zn) and chemical characteristics (pH, N, P, K, Ca, Mg, S, Cu, Zn, Fe, Mn, Na, Al, B and CTC) at the Eurofins ALAC Laboratory.