Desenvolvimento vegetativo de cana-de-açúcar em resposta ao uso de bioinsumos no litoral sul do Rio Grande do Norte

Abstract

Originating from the tropical regions of South and Southeast Asia, sugarcane (Saccharum spp) is an important raw material for the production of ethanol, sugar, energy, cachaça and animal feed. For a good management of this culture, it is essential to know the cycle and the patterns of growth and development of the plants. In this sense, this research aimed to evaluate the effect of applying a mixed mineral fertilizer (Physiativator), organomineral fertilizer (Molecule Carrier) and biological nematicide on the vegetative growth of the RB92579 variety. The work was carried out in the agricultural area of Fazenda Amparo, located in the municipality of Canguaretama-RN, where the entire process of preparation of the area and soil was carried out, in addition to liming and fertilization calculations and application of products in the furrow bottom. The experiment was set up in a randomized block design with 5 treatments, 4 replications, in a total of 20 plots. The following variables were evaluated: sprouting, plant height, stem diameter, number of leaves, leaf width and length, number of tillers, root fresh mass, root length and root dry mass. Significant effect of treatments at 1% probability of error by the F test was obtained for plant height and leaf length. For stem diameter, number of leaves, width of leaves and root length, significance was obtained at the 5% error probability level. The three associated products showed good performance, since the carrier contains organic carbon derived from fulvic acids, which increases the availability, absorption and translocation of various nutrients and elements, favoring the vegetative growth of plants. The Physioactivator must be used in association with the other products, where the Carrier will facilitate the assimilation of the nutrients of the Physioactivator and the Nematicida has the guarantee of protecting the roots against nematode attacks, even the association of the Fisioactivator + Carrier + Bionematicida products, in sugarcane culture provided an increase in the variables evaluated in the study.