FERTILIDADE DO SOLO, ESTADO NUTRICIONAL E PRODUTIVIDADE DE GIRASSOL, EM FUNÇÃO DA APLICAÇÃO DE LODO DE ESGOTO

Victor  Sanches Ribeirinho; Wanderley José  de Melo; Denis  Herisson da Silva; Leila  Aparecida Figueiredo; Gabriel Maurício  Peruca de Melo

FERTILIDADE DO SOLO, ESTADO NUTRICIONAL E PRODUTIVIDADE DE GIRASSOL, EM FUNÇÃO DA APLICAÇÃO DE LODO DE ESGOTO

Autores

Victor Sanches Ribeirinho

Wanderley José de Melo

Denis Herisson da Silva

Leila Aparecida Figueiredo

Gabriel Maurício Peruca de Melo

Editor

Universidade Federal de Goiás

Descripción

The disposal of sewage sludge in agricultural soils is of great concern. It can substitute mineral fertilizers, after a proper potassium supplementation, especially in crops such as the sunflower one. This study aimed to evaluate the grain yield and mineral nutrition of the sunflower cv. CATISSOL 01, as well as the fertility of an Oxisol fertilized with sewage sludge, in comparison to mineral fertilization, for two consecutive years. A randomized blocks design, with 4 treatments (control - mineral fertilization, 5 t ha -1 year -1 , 10 t ha -1 year -1 , and 20 t ha -1 year -1 of sewage sludge) and five replicates, was used. Grain yield, macro and micronutrients contents (in diagnostic leaves) and soil fertility were evaluated. The sunflower seeds yield was similar, in all doses, for both the sewage sludge and mineral fertilization, and macro and micronutrients contents in leaves were within the adequate range. The use of sewage sludge enriched with K showed to be effective for replacing totally or partially mineral fertilization, without affecting the sunflower yield.