Data/hora: 08/06/2024 16:33:52

Provedor de dados: | 90
País: | Brazil
Título: | Chemical and microbiological attributes of an oxisol treated with successive applications of sewage sludge¹
Autores: | Bueno,José Rafael Pires; Berton,Ronaldo Severiano; Silveira,Adriana Parada Dias da; Chiba,Marcio Koiti; Andrade,Cristiano Alberto de; Maria,Isabella Clerici De.
Data: | 2011-08-01
Ano: | 2011
Palavras-chave: | Municipal waste; Organic matter; Soil microbes; Maize.
Resumo: | Studies on sewage sludge (SS) have confirmed the possibilities of using this waste as fertilizer and/or soil conditioner in crop production areas. Despite restrictions with regard to the levels of potentially toxic elements (PTE) and pathogens, it is believed that properly treated SS with low PTE levels, applied to soil at adequate rates, may improve the soil chemical and microbiological properties. This study consisted of a long-term field experiment conducted on a Typic Haplorthox (eutroferric Red Latosol) treated with SS for seven successive years for maize production, to evaluate changes in the soil chemical and microbiological properties. The treatments consisted of two SS rates (single and double dose of the crop N requirement) and a mineral fertilizer treatment. Soil was sampled in the 0-0.20 m layer and analyzed for chemical properties (organic C, pH, P, K, Ca, Mg, CEC, B, Cu, Fe, Mn, Zn, Cd, Ni, and Pb) and microbiological properties (basal respiration, microbial biomass activity, microbial biomass C, metabolic quotient, microbial quotient, and protease and dehydrogenase enzyme activities). Successive SS applications to soil increased the macro- and micronutrient availability, but the highest SS dose reduced the soil pH significantly, indicating a need for periodic corrections. The SS treatments also affected soil microbial activity and biomass negatively. There were no significant differences among treatments for maize grain yield. After seven annual applications of the recommended sludge rate, the heavy metal levels in the soil had not reached toxic levels.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400040
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832011000400040
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.35 n.4 2011
Fonte: | info:eu-repo/semantics/openAccess