Uso de reguladores de crescimento na cultivar de soja BMX fibra

Abstract

Synthetic compounds such as cytokinin, gibberyllin and indolecanoic acid are defined as natural substances that can be applied directly to the plant, or via the seed, to alter vital and structural processes. With the use of bioregulators, it is possible to reduce the height of the plants, making the plant architecture more upright, tolerant to lodging, associated with a greater potential for grain yield. This work aims to verify the effect of the application of different products, acting as growth regulators in the soybean crop. The work was conducted in Pato Branco-PR, in a randomized block design with four replications. Seven treatment protocols were applied, namely: control (no application), Ethrel (150l ha-¹), Lactofen (750 l ha-¹), 2,4-D (30 l ha-¹), StoppingGo (250 l ha-¹), StayUp (500 l ha-¹) and Internode (150 l ha-¹). The following characteristics were evaluated: first pod insertion height (AIPL), plant height (EST), number of lateral branches (NRL), number of pods per plant (NLP), number of nodes per plant (NN) and yield of grains (GR). The use of growth regulators proved to be a viable strategy to reduce plant height and maximize grain yield components.