Teste de envelhecimento acelerado para avaliar o vigor de sementes de Angico do Cerrado (Anadenanthera falcata (Benth.) Speg.)

Abstract

The accelerated aging test has great importance to evaluate seed vigor, becoming of great importance for forest production. Thus, the present work sought to compare two methods for performing the accelerated aging test with seeds of angico do cerrado (Anadenanthera falcata (Benth.) Speg.). The experiment was conducted in the Laboratory of Forest Seed Analysis belonging to the Universidade Tecnológica Federal do Paraná – UTFPR, Dois Vizinhos campus, where the seeds were exposed to two methods, namely, accelerated aging chamber and gerbox method and exposed for 0, 24, 48, 72, 96 and 120 hours. Initially the physical characterization of the seeds was performed: purity analysis, weight of one thousand, number of seeds/kg and determination of the water content. To evaluate the germination capacity of the seeds, preliminary studies were conducted on different substrates (vermiculite, sand, paper roll and blotting paper at 25°C in the presence of light. In this study we defined the paper roll substrate to conduct the standard germination test for the seeds of angico do cerrado. The physiological analysis (percentage of germination and vigor) was evaluated by the first count of germination 7 days after sowing of the seeds exposed to the two methods of accelerated aging in the different exposure times tested. The statistical design was entirely randomized bifatorial 2 x 6 (treatment x exposure time with six repetitions of 25 seeds per treatment. It is recommended to conduct the accelerated aging test for seeds of angico do cerrado (Anadenanthera falcata) using the gerbox method at 30°C for 24 hours.