Efeito da aplicação de água residuária da lavagem dos frutos de café sobre as propriedades químicas do solo
Data
2011-02
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Associação Brasileira de Engenharia Agrícola
Resumo
O objetivo deste trabalho foi avaliar as alterações químicas de solos tratados com água residuária de café (ARC). O experimento foi conduzido em colunas de PVC, onde foram avaliadas quatro doses de ARC (0; 174; 522 e 870 t ha-1 ), em dois Argissolos Amarelos subdivididos em quatro camadas, para dois períodos de incubação (30 e 60 dias). O delineamento experimental foi o inteiramente casualizado, em arranjo fatorial, e as variáveis analisadas foram cálcio, magnésio, potássio, sódio, pH e condutividade elétrica do extrato da pasta saturada. As doses de ARC alteraram as propriedades químicas dos solos nos dois períodos de incubação estudados, aumentando os teores de Ca ++ , Na + e, principalmente, K + nos dois solos. A dose de aplicação de 174 t ha-1 de ARC elevou a concentração de K + no solo para a faixa ideal, de acordo com as exigências nutricionais da cultura. A camada superficial apresentou maior concentração de K + , Na + , Ca ++ e, consequentemente, maior CE es .
The objective of the present study was to evaluate chemical changes of soils treated with coffee fruit washing and pulping wastewater (CWW). The experiment was carried out in PVC columns, where it was applied four doses of CWW (0, 174, 522, and 870 t ha-1 ) in two Yellow Argisoil split into four layers in two incubation periods (30 and 60 days). The experimental design was completely randomized in a factorial arrangement, and it was analyzed calcium, magnesium, potassium, sodium, pH and electric conductivity of the saturated paste extract. The CWW doses affected chemical soil properties in both incubation periods evaluated increasing Ca ++ , Na + and mainly K + in both soils. The CWW dose of 174 t ha-1 increased K + concentration in soil to the recommended level according to nutrition necessity of the crop. The surface layer presented higher concentration of K + , Na + , Ca ++ and, consequently, higher EC es .
The objective of the present study was to evaluate chemical changes of soils treated with coffee fruit washing and pulping wastewater (CWW). The experiment was carried out in PVC columns, where it was applied four doses of CWW (0, 174, 522, and 870 t ha-1 ) in two Yellow Argisoil split into four layers in two incubation periods (30 and 60 days). The experimental design was completely randomized in a factorial arrangement, and it was analyzed calcium, magnesium, potassium, sodium, pH and electric conductivity of the saturated paste extract. The CWW doses affected chemical soil properties in both incubation periods evaluated increasing Ca ++ , Na + and mainly K + in both soils. The CWW dose of 174 t ha-1 increased K + concentration in soil to the recommended level according to nutrition necessity of the crop. The surface layer presented higher concentration of K + , Na + , Ca ++ and, consequently, higher EC es .
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Palavras-chave
Reúso, Qualidade ambiental, Coffea sp
Citação
SILVA, G. B. et al. Efeito da aplicação de água residuária da lavagem dos frutos de café sobre as propriedades químicas do solo. Engenharia Agrícola, Jaboticabal, v.31, n.1, p.158-166, jan./fev. 2011.