Resumo

PILATTI, M. A; ALESSO, A.; FELLI, O.  e  GASPAROTTI, E. Uso de lodos de depuradora sobre suelos de baja productividad en Santa Fe (Argentina). FAVE. Secc. Cienc. agrar. [online]. 2014, vol.13, n.1, pp.63-80. ISSN 1666-7719.

Using sewage sludge on soils with low productivity in Santa Fe (Argentina) The effect of sewage sludge on productive capacity of low aptitude soils (class IV or higher) from the center and north of Santa Fe, and on forage production of sorghum and oats was assessed. Before sowing of sorghum and oats, 0 to 38,5 and 0 to 109 Mg of dry matter/ha of sludge was applied respectively, on a Typic Natracualf. Afterwards, along with forage yield, several chemical and physical soil properties were measured. For both crops, forage production was increased in response to the application of sludge. Moderate salinity levels of sludge has no effect on crop production because salts were washed quickly by rainfall. The amount of sludge applied was related positively to extractable phosphorus, exchangeable calcium and magnesium, total nitrogen, organic carbon, aggregate stability and least limiting water range. Soil pH was improved only at higher doses of sludge.

Palavras-chave : Natracualf; Least limiting water range; Sorghum; Oats.

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