Overcoming of the dormancy brauna seeds (Schinopsis brasiliense Engl.).

Abstract

Aiming to study the most appropriate method to overcome the dormancy in brauna seeds, experiments were conducted at the Universidade Federal do Ceará, in the period of February to July, 2004. We tested three methods (mechanical scarification; chemistry scarification; hot immersion in water) and control. We evaluated the percentage, velocity and average time of germination. We used 200 seeds, with four replicates of 50 seeds each. They were sown in plastic white trays containing substrate sand of river wash and sterilized in heater to 105° ± 3°C for 24h. Then they were moistened in the proportion of 60% of field capacity with water from the faucet. We did daily irrigations to maintain the dampness appropriate to the germination of seeds. A completely randomized design was used and the averages compared by the Tukey Test at 5% of probability. The most indicated method to overcome the dormancy in brauna seeds was mechanical scarification.