COMPÓSITO DE AMIDO-LIGNINA COMO AGENTE MODIFICADOR EM PROCESSO DE LIBERAÇÃO DE FÓSFORO E POTÁSSIO EM FERTILIZANTE ORGANOMINERAL DE CAMA DE AVIÁRIO

Abstract

Brazilian agriculture is a world reference in food production. One of the key processes to maintain quality production is fertilization, a process that is gaining new technologies every day. However, large-scale productions generate a large volume of waste, which, if not handled properly, can harm the environment, as well as even new technologies in fertilization can generate harmful waste. In this sense, new sustainable technologies such as the waste treatment and use and biodegradable materials are of great relevance for maintaining the planet's environmental balance. The work presented here evaluated the use of a starch lignin composite for coating organomineral fertilizer from poultry litter to control potassium (K) release. Eucalyptus shavings were used to obtain the lignin used in the organomineral fertilizer coating process. The coatings were made with 1%, 5% and 10% lignin composites. The leaching tests were carried out with a blank test (sample containing only soil (T1)), standard (soil sample with uncoated fertilizer (T2)), soil with fertilizer coated with 1% lignin (T3), soil with fertilizer coated with 5% lignin (T4) and soil with fertilizer coated with 10% lignin (T5). The data obtained show that T3, T4 and T5 have a superior effect in controlling the P and K release, however, unlike these treatments, the lignin concentration showed a sight statistical difference, but without major influences. Therefore, it can be stated that starch-lignin-based composites can prolong P and K release in Organomineral fertilizer.