Maize productivity in succession soybean fertilized with poultry litter compound

This study aimed to evaluate the effect of composted poultry litter on the growth, development and productivity of soybean, as well as the residual of this fertilization on productivity of a later crop, which was the second harvest corn. The experiment was conducted in the field in Palotina, state of Paraná, with a randomized block experimental design, consisting of six treatments with four replications per treatment. For soybeans the treatments were the absence of chemical and organic fertilization in the control (T1), chemical fertilizer considered standard for the region at a dose of 0.25 t.ha-1 NPK (T2), poultry litter compost at 2, 4 and 6 t.ha-1, respectively, in treatments T3, T4 and T5, and 0.125 t.ha-1 chemical fertilization associated with composted litter at a dose of 4.0 t.ha-1 in the treatment T6. There were significant results for soybean productivity, with the best results found in T4 and T5, i.e., at doses from 4 to 6 t.ha-1 composted poultry litter. The effects of residual nutrients in the soil on the crop following soybean, which was second harvest corn fertilized with 08-20-20 NPK for all grown plots, the best result of productivity was observed in the treatment T4.