Composto de lodo de esgoto para o cultivo inicial de eucalipto

Abstract

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

Chemical and technological attributes of sugarcane as functions of organomineral fertilizer based on filter cake or sewage sludge as organic matter sources

“…Such factors are essential in sugarcane cultivation in months with low rainfall and under cultivation with no irrigation [ 56 , 81 ]. In eucalyptus, sewage sludge compost increased plant dry matter, with a gain of 50% compared to that observed under mineral fertilizer, indicating that this source of OM can replace mineral fertilizer [ 82 ]. Organomineral fertilizers also have the potential to reduce reliance on mineral fertilizer imports.…”

Chemical and technological characteristics of sugarcane as a function of pelletized organomineral fertilizer with filter cake or sewage sludge sources

“…Such factors are essential in the cultivation of sugarcane in months with low rainfall and in cultivations without irrigation [38,61]. In eucalyptus, sewage sludge compost increased the dry matter of the plants with a gain of 50% compared to the mineral fertilizer, indicating that this source of OM can replace the mineral fertilization [62]. The organomineral fertilizers have also the potential to significantly reduce the dependence on imports of mineral fertilizer sources of N, P and K. The reduction of costs of importation of P by a combination of features allows to increase economic productivity due to better use of energy and water [63], which increases the competitiveness of the agricultural sector.…”