Influência da densidade de plantio no rendimento de soja

Abstract

Productivity in a soybean crop is defined by the interaction between the plant, the production environment and management. Among management practices, the choice of cultivar, spacing and density of plants per linear meter are factors that can influence growth and grain yield. The objective of this work was to evaluate the influence of planting density on soybean yield. The experiment was carried out in a soybean production area, in the municipality of Benedito Leite in the state of Maranhão, at the Bomar Agricultural Farm. Therefore, an experimental design of randomized blocks was adopted. The treatments consisted of four densities of 10, 12, 14 and 16 plants per linear meter, with five replications. Sampling took place at the time of harvest, and the plants were in the final phenological reproductive stage R8. Samples of plants in the field were randomly collected. Soon after, the evaluations were carried out in the chemistry laboratory of the State University of Piauí, at Campus Cerrado do Alto Parnaíba– CCAP. The evaluations carried out in the chemistry laboratory were plant height, number of pods, number of nodules, biomass weight, pod weight, grain weight, thousand grain weight and productivity in bags per hectare. The weights of pods, biomass, grains and productivity in bags per hectare, obtained significance by the F test at 5% in the statistical analysis of regression. Final plant height, thousand-grain weight, number of pods and nodules per plant were not influenced by the increase in plant density