Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que o trabalho original seja corretamente citado. ABSTRACTThis work evaluated the feasibility of the use of sludge composed from a domestic sewage treatment plant as fertilizer for initial eucalyptus cultivation, urograndis hybrid. The experiment was conducted in a greenhouse, at CCA -UFSCar, Araras, SP, from November 12, 2014 to January 28, 2015. Cultivation occurred in 11 L pots for 75 days. We adopted a complete randomized design, with five treatments and seven repetitions. The tests consisted of a control treatment without fertilization, three treatments with sewage sludge compost addition (25, 50 and 75% of the pot volume) and a treatment with conventional mineral fertilizers, all in clayey soil. The height of the plants, relative growth rate (TCR), dry mass and nutrient concentration in eucalypt leaves were measured. Dry mass was lower for the plants in the control treatment; however, we found no significant difference between treatments with fertilization. TCR was higher in the treatment with 75% of the pot filled with sewage sludge compost (p < 0.05). The composed of sewage sludge has a potential substitute of conventional mineral fertilization for initial eucalyptus cultivation.
RESUMONeste trabalho, foi avaliada a viabilidade do uso de composto de lodo de esgoto, proveniente de estação de tratamento de esgoto, como fertilizante alternativo para o cultivo inicial de eucalipto. O experimento foi realizado em casa de vegetação no CCA -UFSCar, Araras, SP. Os cultivos ocorreram em vasos de 11 L durante 75 dias. O delineamento experimental foi inteiramente ao acaso, com cinco tratamentos e sete repetições. Os tratamentos adotados foram constituídos por uma testemunha, três tratamentos com composto de lodo de esgoto (25%, 50% e 75% do volume do vaso) e um tratamento com fertilizante mineral convencional, todos em solo arenoso. Ao final do experimento, a taxa de crescimento relativo (TCR) e a massa seca das plantas foram medidas e submetidas à análise de variância seguida pelo teste de Tukey a 5% de probabilidade. A TCR foi maior nos tratamentos com fertilização do que na testemunha, mas não diferiu entre a fertilização mineral e as doses de fertilização orgânica. A massa seca das plantas foi maior no tratamento com 50% do volume do vaso com fertilizante orgânico (p<0,01). Assim, o composto de lodo de esgoto se mostrou com potencial para substituir fertilizantes minerais convencionais no cultivo inicial de eucalipto.Palavras-chave: composto orgânico, fertilizante, nutrição vegetal,.orgânico classe D, sustentabilidade. Sewage sludge compost for initial cultivation of eucalyptus ABSTRACTThis study evaluated the feasibility of sewage sludge compost obtained from a sewage treatment plant as an alternative "Class D" organic fertilizer for the initial cultivation eucalyptus. The experiment was conducted in a greenhouse at CCA -UFSCar, Araras, SP. Cultivation occurred in 11 L pots for 75 days. We adopted a completely randomized design, with five treatments and seven repetitions. The tests considered a control treatment with no fertilization, three treatments with sewage sludge compost addition (25%, 50%, and 75% of the pot volume) and a treatment with conventional mineral fertilizers, all in sandy soil. At the end of the experiment, plant relative growth rate and dry mass were evaluated and submitted to analysis of variance, followed by a Tukey test at 5% probability. Treatments with
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