Respuesta del cultivo de lúpulo al tratamiento con bacterias Rizosféricas

Abstract

The Lupulo (Humulus lupulus) is an aromatic plant grown for industrial purposes, almost exclusively brewers. Its flowers or "cones" contain resins that give beer bitter taste and stability, and essential oils that characterize its aroma. The Andean Region from the 42nd parallel, it is one of the two places in the country where hops are produced. The management of the crop it is done in a conventional way, being most of the agrochemicals used, fertilizers Among the organic alternatives that could be used to promote nutrition of the culture, is the addition of rhizospheric bacteria, which are a type of microorganisms that colonizes the roots of some plants in a symbiotic relationship, favoring their nutrition and health through different mechanisms. The objective of this work is to evaluate the response of culture to treatment with rhizospheric bacteria, measured as accumulated biomass. He evaluated: Azospirillum brasilense; Pseudomonas fluorescens; Bacillus subtilis and a tribacterial C product called PGPR® (Plant Growth Promoting Rhizobacteria). Two field trials were carried out using plants of the Nugget variety (high resin variety); one trial was conducted in nursery to field and the other in an adult plantation in productive stage; the biofertilizers were applied in aqueous solution on the strain of each individual; at the time of harvest it . They took data on the response variables: biomass / plant and cones / plant. The statistical analysis of the data showed no significant differences with respect to the control but positive trends to treatment with PGPR in the nursery trial. In the case of the adult plantation, despite having assembled a DCA, a statistical analysis could not be made, since the plants harvested in groups by treatment and not individually (due to operational establishment at the time of full harvest), favorable average values were obtained for the treatments Azospirillum brasilense and Pseudomonas fluorescens.