Efecto de microorganismos en la elaboración de lombricompost y evaluación de aplicaciones combinadas con abonos químicos al suelo, sobre el cultivo Pennisetum purpureum “Cuba 22”. Finca La Chica San Francisco Zapotitlán, Suchitepéquez.

Abstract

SUMMARY Finca “La Chica” has had cattle for the production of milk and derivatives for 13 years and as a by-product, cow excrement is obtained, which is subjected to a fermentation process for 3 months. After this time, the basic input for the vermicompost (organic matter) is obtained. The production of vermicompost has an average production time of 6 months depending on the farm; therefore, the conventional vermicompost production process was carried out in one pool and organic microorganisms were applied in another pool with the purpose of synthesizing, optimizing and comparing the production and time of these fertilizers. Finally, the fertilizers produced (with and without microorganisms) were applied in combination with chemical fertilizers to the Pennisetum purpureum Schumach. Poaceae “Cuba ct-115”/ “Cuba 22” crop. A complete randomized experimental design was used with 4 replications structured by 7 treatments that included, in addition to organic fertilizers, inorganic fertilizers in combination with the previous ones: Urea, 15-15-15 and a control. Evaluating two variables: fresh weight (kg/plant) and leaf length (m). Finally, an economic analysis was developed to determine the profitability of both organic products. The results of the preparation of vermicompost without microorganisms (pool 1) vs vermicompost with microorganisms (pool 2) were: pool 2 had a delay of 1-2 weeks in production with respect to pool 1. The temperature ranges between both pools they had a difference of 1-3 degrees centigrade by placing pool 2 over pool 1. A bromatological analysis was performed on both fertilizers, which yielded relevant results regarding the high saturation of salts present in both samples