Desenvolvimento e avaliação agronômica de fertilizante orgânico de subprodutos do processamento de couro

Abstract

Brazil is one of the largest food producers in the world, consequently it is a large consumer of fertilizers, being the largest importer of fertilizers in the world. Organic waste from industries can be reused as a basis for the production of fertilizers, in such a way as to reduce the need to import these inputs. The leather processing industry (tannery) is a large generator of organic waste with high potential for the production of fertilizers, substrates and soil conditioners, namely: Wet-Blue bran, Wet-White bran, class I sludge, sludge class II, limed tallow and carnase. In this sense, an experiment was carried out to evaluate the agronomic performance of two organic fertilizers produced from the by-products of the leather processing of the company MASTROTTO BRASIL S/A. Organic fertilizers are classified for validation as class A and class B, these have gone through the process of evaluating their agronomic performance. The experiment was conducted in a protected environment at the Department of Soils and Rural Engineering of the Federal University of Paraíba in the city of Areia (PB) ). A completely randomized design was used in a 5x2 factorial scheme with 3 replications for each treatment. The limits of the chemical components of the organic fertilizers studied were analyzed in accordance with the normative instructions of the Ministry of Agriculture, Livestock and Supply (MAPA). The levels of primary and secondary macronutrients, micronutrients, organic carbon, moisture, C/N ratio, chemical and biological contaminants and inert materials are within the maximum limits in accordance with current legislation.