Soil microbial biomass after two years of the consecutive application of composted tannery sludge

Because the agricultural use of tannery sludge may cause increased risks to soils, composting is recognized as one of the most suitable alternative for tannery sludge recycling. Experiments were conducted under field conditions to evaluate the effects of composted tannery sludge (CTS) on the soil mi...

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Bibliographic Details
Published in:Acta scientiarum. Agronomy 2014-03, Vol.36 (1), p.35-41
Main Authors: Gonçalves, Iuna Carmo Ribeiro, Araújo, Ademir Sergio Ferreira, Nunes, Luís Alfredo Pinheiro Leal, Melo, Wanderley José de
Format: Article
Language:eng ; por
Subjects:
AGRONOMY
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Summary:Because the agricultural use of tannery sludge may cause increased risks to soils, composting is recognized as one of the most suitable alternative for tannery sludge recycling. Experiments were conducted under field conditions to evaluate the effects of composted tannery sludge (CTS) on the soil microbial biomass and trace elements after two years of consecutive applications. The following five treatments were used: 0 (without CTS application), 5, 10, 20 and 40 ton ha-1 of CTS (dry basis). Soil samples were collected at 60 days after the CTS application at 0-20 cm depth. The CTS application promoted changes in the soil microbial biomass C (SMB-C) and N (SMB-N). In the first year, significant increases in the SMB-C and SMB-N were observed with the application of 10 ton ha-1. Furthermore, CTS application increased the Cr content in the soil after two years of application.
ISSN:1807-8621
DOI:10.4025/actasciagron.v36i1.17160