Resumen
This work has the objective to assess the agronomic efficiency of the nitrogen, phosphate and potassium fertilizations by fertilizers lined up with polymers at the growing cotton. Were installed three experiments where the treatments were distributed in factor arrangement 3x2+1, with four replications. The first factor was constituted by three doses of the fertilizer (80, 160 and 240 kg ha-1 of Nitrogen; 50, 100 and 200 kg ha-1 of P2O5; 50, 100 and 200 kg ha-1 of K2O); the second factor were made by two sources of fertilizers (conventional and lined up with polymers); and the additional treatment (control without fertilizer). The production of fresh dry mass of the aerial part of the cotton plant was evaluated 60 days after the emergence. The growth of biomass fresh was superior when using Kimcoat-N (fertilizer lined up with polymers). Phosphate and potassium fertilizations coated polymers were statistically higher in dry mass production. Among the doses studied, there was statistical difference for phosphorus in the production of dry and fresh mass of the Cotton crop.