Avaliação de métodos para superação de dormência em sementes de acácia australiana (Acacia mangium)

Abstract

The objective of the work was to analyze the effectiveness of different methods of overcoming dormancy in Acacia mangium seeds. The work was carried out in the laboratory of the Pontifical Catholic University of Goiás – PUC Goiás. The treatments consisted of the witness, mechanical scarification, immersion in water at 100ºC, immersion in water at room temperature for 12 hours. For each treatment, four replications of 50 seeds were used, distributed on a roll of germitest paper, moistened with water, at a rate of two and a half times the weight of the paper and kept in a germination chamber at a constant temperature of 30°C and a photoperiod of 12 hours. The results demonstrated that the most efficient treatment for overcoming dormancy was immersion in hot water, with 82% of seeds germinated 21 days after sowing. For the immersion treatments in water at room temperature, the highest seedling height was observed at 21 and 35 days after sowing.