EFEITO DE DOSES DE HERBICIDA E TIPOS DE INOCULANTES NA CULTURA DA SOJA FTS PARAGOMINAS NO MUNICÍPIO DE AREIA-PB

Abstract

The production of soybeans (Glycine max L. Merill) in Brazil has been growing every year, placing the country as the second largest producer of this grain in the world. These good results are the fruit of the intense work of breeding of the species, which generated highly productive varieties resistant to certain herbicides, as well as the development of techniques that allow better results of biological nitrogen fixation by the plant, such as those obtained with the use of inoculants . The objective of this study was to evaluate the effects of two types of inoculants and herbicide doses under the agronomic characteristics and production components of the soybean cultivar FTS Paragominas RR in the city of Areia, Paraíba. The experiment was carried out from May to September 2017, in an experimental area belonging to the Agricultural Sciences Center of the Federal University of Paraíba, located in the city of Areia. The experimental design consisted of a 2 x 3 factorial conducted in a randomized block design, with four replications and the controls, totaling 28 plots. The experimental units were composed of three 3m lines, spaced 0.50 meters apart. The useful area was formed by the center line, where data were collected on the evaluated characteristics: plant height (cm), height of first pod insertion (cm), number of pods per plant, number of seeds per pod, weight of pods thousand seeds (g) and productivity (kg / ha). The averages were evaluated using the Tukey test at 5% probability. Significant effect was found at 1% probability of the inoculant under the height of plants, and at 5% under the number of pods per plant. For the inoculant versus glyphosate interaction, a significant effect was observed at 1% for plant height and productivity variables. The use of liquid inoculant associated with the dose of 3 L / ha of glyphosate was satisfactory in some of the parameters, obtaining similar productivity to that registered in experiments with good results for soybean.