Abstract
The aim of this experiment was to evaluate the behavior of sorghum culture submitted to portions of maturate effluent of cassava industry. Thus, this study was carried out at Centro Técnico de Irrigação (Technical Irrigation Center) of Universidade Estadual de Maringá (State University of Maringá), state of Paraná, Brazil. Maturate effluent samples were collected from a lagoon, whose depth was not up to 0.50 m. Lysimeters of 1.0 m3 volume and 2.0 m2 area were applied to a sorghum culture. The utilized experimental design was composed of blocks at random in three treatments and six replications. The treatments were consisted of an application of: 150, 450 and 900 m3 ha-1 portions per year of mature effluent. The mature effluent from cassava industry supplied the nutritional necessities, which were required by sorghum for its entire development and production of green matter (or dry matter). A positive reply in growth, considering the entire process, in which the maximum portion added to sorghum culture was 450 m3 há-1, was verified. Otherwise, the elements of variable senescent leaves showed a negative correlation compared to others. A fertilizing effect of effluent was verified and analyzed according to the growth of the sorghum culture in relation to the macronutrients by potassium increase
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