Decomposition of forage plant residues as a function of use bioactivator

• Autor(a) principal: Oliveira, Tayla Évellin de
• Data de Publicação: 2021
• Outros Autores: Piza, Paola Cristina de, Mantovani, José Ricardo, Florentino, Ligiane Aparecida
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Agrarian (Dourados. Online)
• Texto Completo: https://ojs.ufgd.edu.br/index.php/agrarian/article/view/14983
• topic: Green manure; Bioactivation; CO2 evolution; Mineralization; Bioativação; Evolução CO2; Mineralização; Adubação verde

The knowledge of the characteristics of decomposition and release of nutrients from plant residues is of paramount importance for the production system and has a fundamental role in the conservation and management of soil fertility. The objective of this study was to evaluate the effect of bioactivator on the decomposition of different plant residues added to the soil and on the levels of available phosphorus. Five treatments were used, being four residues from the aerial part of Brachiaria humidicola, B. ruziziensis, Crotalaria juncea and Cajanus cajan and a negative control (no plant residue), associated or not with the application of soil bioactivator at a dose of 600g ha-1. The experimental design used was entirely randomized, in a 5x2 factorial scheme, with three replicates per treatment. The decomposition of the residues was measured by means of the evolution of CO2-C, in weekly samplings, for a period of 56 days and the levels of P given by chemical analysis of the soil at the end of the experiment. The use of the soil bioactivator did not contribute positively to the accumulation of evolved carbon and phosphorus levels.