Produção de substratos e fertilizantes orgânicos a partir da compostagem de cama de cavalo

Abstract

Following the growing demand for organic products has also grown in Brazil to search for organic inputs that are produced respecting the environment and that have affordable costs to the farmer. The horse bed is an alternative feasible to meet this need in places where there is domestic or commercial establishment horses. This study aimed to assess the feasibility of obtaining substrates and organic fertilizers through composting bed horse. Initially, it was studied the process of composting bed and pure horse with the addition of pie castor, evaluating several features over 120 days of incubation. In then the compounds were evaluated as substrates for the production of seedlings organic vegetables and as fertilizers used on lettuce-based fertilizer and beet produced in an organic system. It was observed that compounds formulated base horse bed, regardless of the addition of castor bean, achieved and maintained by several days temperatures above 55 °C, which is sufficient for removing herbal spontaneous and pathogens. The addition of castor cake mix in compost provided subtle increases in temperature of the battery and the final content of N compounds, compared to treatment with pure horse bed, but resulted in considerable increases emission of NH3 and N loss during the composting process, and representing an increase in production cost. The compounds horse bed, regardless of the addition of castor bean, they have proved efficient for use as substrates in organic production of lettuce seedlings, beets and tomatoes. fertilizers organic obtained from horse compost bed did not provide answers on lettuce grown in organic production system, but induced increases in beet production in organic system. Composting proved a efficient process for obtaining organic fertilizer substrates from the bed horse, enabling an environmentally correct disposal for this waste of equine