HIPOCLORITO DE SÓDIO E HIDRÓXIDO DE AMÔNIO COMO ALTERNATIVA PARA LIMPEZA DE SEMENTES DE MANGABA

Abstract

Sexual propagation is the most used for ‘Mangabeira’ trees and Manual cleaning is laborious and can take much of precious work time. This makes the use and search for different methodologies of great importance. The present work aimed to evaluate the methodology of removing the pulp and latex adhered to the seeds by different chemical reagents in contrast to the manual cleaning methodology. The fruits had the seeds removed manually and the pulp discarded, then the seeds placed in a beaker. Five different treatments were performed: manual cleaning (control); NaClO, 1.0 mL per 25.0 mL seed and residue, resting for 24 hours; NH4OH, 1.0 mL/100.0 mL seed and residue, 24-hour rest; H2SO4, 1.0 mL/50.0 mL seed and residue, 10 minutes of rest; NaOH, 1.0 mL/100.0 mL seed and residue, rest for 25 minutes. Variables analyzed: dead and hard seeds, normal and abnormal seedlings, germination speed index, average germination time and root and shoot length. We observed that H2SO4 had a high abnormality rate and NaOH high mortality, while NH4OH and NaClO were similar to the control treatment, then being great alternatives in the cleaning of residues from Mangaba seeds.