Teste de envelhecimento acelerado para vigor de sementes de jacaranda-branco (Machaerium paraguariense Hassl)

Abstract

The accelerated aging test is extremely important because from it the vigor of the seedsis detected, which is necessary for the success of a future planting. Based on this assumption, the present work seeks to compare two methods for carrying out the accelerated aging teste with Jaracanda-branco (Machaerium paraguariense Hassl) seeds. The experiment will be Carrie out at the Laboratório de Análises de Sementes Florestais belonging to Universidade Tecnológica Federal do Paraná, Campus Dois Vizinhos. The seeds will be exposed to two treatments, namely, accelerated aging chamber and gerbox method for 0,24, 48, 72 and 120 hours. The seeds are collected by a private company in the sector in the state of São Paulo. Initially, they were extracted and processed, and their physical characterization was carried out: weight of one thousand and number of seeds/kg. Subsequently conditioned to accelerated aging in both treatments and performed analysis of water content. After exposure to aging, physiological analysis (germination and vigor) was performed in germination chamber at 25ºc in the presence of light, placed in a gerbox on vermiculite. Concluding that there was a decrease in germination with longer exposure time in both methods and there was also a significant difference between treatments, where the gerbox method with 48 hours exposure was the most efficient method for vigor evaluation.