Does the use of phytostimulants and the cutting times influence the productivity of the soybean crop?

Abstract The use of techniques and products that maximize the production of a crop is fundamental when considering the scarcity of areas in regions that have adequate edaphoclimatic conditions for production or climatic inconsistency in other regions. Thus, the growth of national soybean production is due to research related to the theme; however, more studies can contribute to a greater productive advance in this segment. With this, the objective was to observe the influence of cutting times and the phytostimulant on the productivity of the soybean crop. Studies developed were in two agricultural years 2014/15 and 2015/16. The plot design was used, where the plots were formed by the cutting periods (40, 50, 60, 70 and 90 days after emergence (DAE) [1]and the subplots by the application of the phytostimulant (auxin, cytokinin and gibberellin), plus the witness without cutting. The Stimulate ® positively (statistically higher) influenced analyzed variables; number of total pods (NVT), number of full pods (NVC), straw yield (RP), crop growth rate (TCC), harvest index (CI) and yield (GY). Cutting the aerial part of soybean plants at 40 DAE does not reduce grain production. Treatment of soybean seed with Stimulate® increases productivity at 15% and up to 60 DAE significantly stimulates soybean growth and regrowth.