Qualidade do grão e da bebida em cafeeiros tratados com lodo de esgoto
Data
2005-01
Título da Revista
ISSN da Revista
Título de Volume
Editor
Instituto Agronômico (IAC)
Resumo
O objetivo deste trabalho foi avaliar o efeito da aplicação de lodo de esgoto (LE) em plantação comercial de café, sobre a qualidade de bebida, avaliada pela atividade da enzima polifenoloxidase (PFO) e por análise sensorial. O trabalho foi realizado em condições de campo, na Fazenda Santa Elisa, localizada no município de Patrocínio Paulista (SP), em 2001 e 2002. A variedade de café usada em todos os talhões foi Acaiá. O plano de trabalho constou da análise de talhões comerciais em seis agrupamentos, conforme as doses e freqüências de aplicação de lodo de esgoto, denominados tratamentos. Todos os talhões receberam adubação mineral, conforme a análise de solo, e assim foram definidos os diferentes tratamentos. Tratamento 1: talhões B2, B3, B4 e B5, sem aplicação de lodo de esgoto; tratamento 2: talhões C5 e C6, 9,0 T ha-1 de LE (1998), 4,8 t ha-1 (1999) ,11,8 t ha-1 (2000) e 4,2 t ha-1 (2002); tratamento 3: talhões D5 e D6, 9,0 t ha-1 de LE (1998), 4,8 t ha-1 (1999), 11,8 t ha-1 (2000) e 4,2 t ha-1 (2002); tratamento 4: talhões E1 e E2, 9,0 t ha-1 de LE (1998) e 4,2 t ha-1 (2002); tratamento 5: talhões E3 e E4, 9,0 t ha-1 de LE (1998), 4,8 t ha-1 (1999) e 4,2 t ha-1 (2002); tratamento 6: talhões H1, H2, H3, H4 e H5, 22,4 t ha-1 (1999). Foi realizada análise visual dos grãos quanto ao tamanho, e a qualidade da bebida, avaliada pela prova de xícara e atividade da enzima polifenoloxidase. A aplicação de lodo de esgoto não afetou a qualidade da bebida nas condições deste experimento. Houve baixa concordância entre as classificações obtidas pela atividade da polifenoloxidase e pela prova de xícara, para os dois anos analisados.
The objective of this study was to evaluate the effect of the application of sewage sludge (LE) in a commercial coffee crop on the quality of the beverage as evaluated by the activity the enzyme of polyphenoloxidase (PPO) and sensory analysis. The work was carried out under commercial field conditions at the Santa Eliza Farm, Patrocínio Paulista, State of São Paulo, Brazil, in 2001 and 2002 with coffee cultivar Acaiá, groupped in six treatments according to the dose and frequency of application of the sewage sludge. All plots received mineral fertilization according to soil analysis and to the different treatments as follow: treatment 1: plots B2, B3, B4 and B5, without sludge; treatment 2: plots C5 and C6, 9.0 t ha-1 of LE (1998), 4.8 t ha-1 (1999) ,11.8 t ha-1 (2000) and 4.2 t ha-1 (2002); treatment 3: plots D5 and D6, 9.0 t ha-1 of LE (1998), 4.8 t ha-1 (1999), 11.8 t ha-1 (2000) and 4.2 t ha-1 (2002); treatment 4: plots E1 and E2, 9.0 t ha-1 of LE (1998) and 4.2 t ha-1 (2002); treatment 5: plots E3 and E4, 9.0 t ha-1 of LE (1998), 4.8 t ha-1 (1999) and 4.2 t ha-1 (2002); treatment 6: plots H1, H2, H3, H4 and H5, 22.4 t ha-1 (1999). Visual analysis of the beans was performed regarding to type and size. Beverage quality was evaluated by cup test and by PPO activity. Sewage sludge had no effect on the quality of the beverage. There was low agreement between the classifications obtained according to PPO activity and that of the cup test for the two years.
The objective of this study was to evaluate the effect of the application of sewage sludge (LE) in a commercial coffee crop on the quality of the beverage as evaluated by the activity the enzyme of polyphenoloxidase (PPO) and sensory analysis. The work was carried out under commercial field conditions at the Santa Eliza Farm, Patrocínio Paulista, State of São Paulo, Brazil, in 2001 and 2002 with coffee cultivar Acaiá, groupped in six treatments according to the dose and frequency of application of the sewage sludge. All plots received mineral fertilization according to soil analysis and to the different treatments as follow: treatment 1: plots B2, B3, B4 and B5, without sludge; treatment 2: plots C5 and C6, 9.0 t ha-1 of LE (1998), 4.8 t ha-1 (1999) ,11.8 t ha-1 (2000) and 4.2 t ha-1 (2002); treatment 3: plots D5 and D6, 9.0 t ha-1 of LE (1998), 4.8 t ha-1 (1999), 11.8 t ha-1 (2000) and 4.2 t ha-1 (2002); treatment 4: plots E1 and E2, 9.0 t ha-1 of LE (1998) and 4.2 t ha-1 (2002); treatment 5: plots E3 and E4, 9.0 t ha-1 of LE (1998), 4.8 t ha-1 (1999) and 4.2 t ha-1 (2002); treatment 6: plots H1, H2, H3, H4 and H5, 22.4 t ha-1 (1999). Visual analysis of the beans was performed regarding to type and size. Beverage quality was evaluated by cup test and by PPO activity. Sewage sludge had no effect on the quality of the beverage. There was low agreement between the classifications obtained according to PPO activity and that of the cup test for the two years.
Descrição
Palavras-chave
Coffea arabica, Lodo de esgoto, Qualidade de bebida, Polifenoloxidase (PFO)
Citação
MARTINS, D. R.; CAMARGO, O. A.; BATAGLIA, O. C. Qualidade do grão e da bebida em cafeeiros tratados com lodo de esgoto. Bragantia, Campinas, v. 64, n. 1, p. 115-126, Jan./Mar. 2005.