EFECTO DE ABONOS ORGÁNICOS EN LA DINÁMICA MICROBIOLÓGICA DEL SUELO Y PRODUCCIÓN DE Alpinia purpurata (VIEILL) K. SCHUM

Organic fertilizers provide an important contribution of organic matter that modifies the physical, chemical and microbiological characteristics of the soil. To determine the impact of solid and liquid fertilizers on cultures of Alpinia purpurata, the supply of organic C, total N and available P of five organic fertilizers, the population density of phosphate solubilizing bacteria (PSB), the indigenous arbuscular mycorrhizal fungi (AMF), and the plant responses were evaluated, at 365 days, on a Fluvisol soil. The treatments were compost, vermicom-post, fermented manure, Bokashi and liquid humus, at doses of 6Mg.ha^sup -1^ of solid fertilizers, and 60 1.ha^sup-1^ of liquid fertilizers, and compared with chemical fertilizer (150-50-250) and a control. The organic fertilizers applied showed that after a year, the C, N and P concentrations in the soil maintained acceptable nutritional levels for production. Organic fertilizers increased five times the population density of PSB and 12% the total colonization by AMF, promoting a higher P availability for the plants, improving the production of total biomass and flower quality, fermented manure and compost standing out in production.