Aplicação de fertilizante organomineral de lodo de esgoto e bioestimulante na cana-de-açúcar

Abstract

Brazil is the main world producer of sugarcane (Saccharum spp.), and this crop is of great importance for Brazilian agribusiness. It is the main raw material for the production of ethanol, since it generates clean and renewable energy. The objective was to indicate the use of organomineral fertilizer (FOM) and biostimulants and to evaluate the initial and final development, crop yield and the technological quality of the sugarcane juice fertilized with organomineral fertilizer based on sewage sludge interacting with biostimulant (LVAd) with higher fertility and Dystrophic Yellow Latosol (LAd) of lower fertility. The experiments were carried out in LVAd at the Goiano Federal Institute - Campus Morrinhos - GO, with fertilization recommendation of 470 kg ha-1of formulation 04-21-07 and coverage of 400 kg ha-1 of formulation 07-00-28 + 0.7% of B and LAd in the Vale do Tijuco Plant, located in Rio do Peixe, Prata - MG district, with fertilization recommendation of 570 kg ha-1 of formulation 04-21-07 and coverage of 570 kg ha-1 of formulation 07-00-28 + 0.7% of B. The experimental design was randomized blocks in a 5 x 2 +1 factorial scheme, five doses (0, 60, 80, 100 and 120% of planting recommendation and cover) with and without biostimulant plus one additional (100% mineral fertilizer (FM)) in four replicates. Stimulate biostimulant (0.09 g dm-3 of cytokinin, 0.05 g dm-3 of auxin and 0.05 g dm-3 of gibberellin) was used. In LAd, the increase of the percentages of the fertilization favors and increases the initial development, yield of stem, biometric characters and sugar productivity without and with biostimulant. The use of biostimulants does not contribute to the initial development of the crop, biometry and yield of stem, however, increases the accumulation of ATR in 1.74%. In LVAd, the increase in fertilization percentages are similar in broth quality, biometrics, yield and the development of sugarcane. The use of biostimulants increases results in the initial development of the crop, yield of stem, biometric characters and sugar yield of sugarcane juice. In both environments the fertilization with FOM the base of biosolid is similar to fertilization with FM. In LVAd there is higher production of sugars and better quality of the sugarcane juice. The use of FOM and biostimulant are alternatives for the sustainable fertilization of the soil and cycling of nutrients in the sugarcane crop.