EVOLUÇÃO DA CANA-DE-AÇÚCAR (Saccharum spp.) ADUBADA COM FERTILIZANTE ORGANOMINERAL A BASE DE LODO DE ESGOTO E BIOESTIMULANTE EM CINCO ANOS

Abstract

Sugarcane (Saccharum spp.) is important in the biofuel sector, due to its potential in the production of ethanol and its by-products. Organomineral fertilizers have been a promising alternative for fertilization and the addition of organic matter. Biostimulants are substances capable of increasing the production and quality of plants. The objective was to evaluate the yield components and productivity of sugarcane fertilized with mineral and organomineral fertilizer, with and without biostimulant, in 5 years. The experimental design was in randomized blocks in a 2 X 5 + 1 factorial scheme, with five treatments, with and without biostimulant plus an additional one (mineral fertilizer) in four replications. The treatments were developed according to the recommendation of planting fertilization of 470 kg ha-1 of the 04-21-07 formulation and coverage of 400 kg ha-1 of the 07-00-28 + 0.7 B at 150 days after the planting (DAP) and at 90 days after the cuts (DAC). Based on the soil analysis of the experimental area, the treatments consisted of 100 % with mineral source; 0, 60, 80, 100 and 120 % (with and without biostimulant) of the organomineral source of sewage sludge. It was concluded in this work that there is an increase in sugarcane productivity from the second cut. Plants fertilized with organomineral fertilizer at a dose 120% of the recommended dose have greater heights and diameters. There is greater productivity when using organomineral fertilizer and lesser with mineral source. The biostimulant promotes an increase in sugarcane productivity in the absence of fertilization. The biostimulant promotes plant height increase by using 120% of the recommended fertilization with an organomineral source.