Efeito de diferentes doses de esterco de galinha e Bokashi líquido na produção de biomassa de Justicia pectoralis Jacq.

Abstract

Justicia pectoralis is a herbaceous species native to the Amazon and is included in the National List of Medicinal Plants of Interest to the Brazilian Unified Health System (RENISUS), which highlights its therapeutic potential and the need for more scientific studies to confirm its efficacy and safety, especially when using organic inputs in its cultivation. Bokashis (fermented organic fertilizers) are important tools in the management of organic production systems, as they can, through the action of microorganisms, improve soil fertility, plant growth and protection, productivity, and crop quality. The study aimed to evaluate the organic cultivation of the species using four doses of chicken manure and with or without the use of the liquid Bokashi organic fertilizer (OF). The experiment was conducted in a shaded nursery, in a completely randomized design, using 3.6 L pots, in a factorial scheme of 4 (manure doses) x 2 (with or without OF), resulting in eight treatments, with two replications of five plants each. The evaluated parameters were plant height (cm), shoot diameter (cm), root volume (cm³), and dry mass of the shoot and root system (g). Fertilization with chicken manure at a 1:3 ratio (one part manure to three parts soil), combined with the use of liquid Bokashi, provided the best results in terms of growth and biomass accumulation in J. pectoralis.