Characterization of the nutritional quality of frass Acheta Domesticus produced under culture conditions

Abstract

The use of organic fertilizers has multiple advantages, such as their low cost, ability to improve soil structure, aeration and texture, as well as to improve soil water retention and plant root health. In contrast, synthetic fertilizers have good short-term effects, but in the long term may have toxic effects on the soil. Among organic fertilizers, insect manures have been shown to have nutrients and microorganisms that can be beneficial to plants and soil. This project seeks to determine the nutritional quality of Acheta Domesticus manure, taking into account different stages of maturation. The variables analyzed were pH, conductivity, moisture, organic matter and phytotoxicity. In addition, bacteria were isolated from the samples.
The conductivity and organic matter values obtained in the two samples were slightly elevated with respect to the maximum allowed for fertilizers. Phytotoxicity was very high when manure was evaluated as a fertilizer; however, at low concentrations, it evidenced moderate phytotoxicity, which allows its use as a biostimulant. Likewise, a higher bacterial count was achieved in the sample with the shortest maturation time. Eight Gram-positive bacilli and one Gram-positive coccus were isolated. The presence of sporulated bacilli could indicate the presence of Bacillus subtilis, a plant growth promoting and pathogen biocontrolling bacterium. Some of the manure stabilization conditions need to be adjusted for proper manure maturation to ensure less phytotoxicity of manure as a fertilizer.