ULTRASOUND AND WATER IMMERSION TO PROMOTING VIGOR IN SEEDS AND SEEDLINGS OF Cnidoscolus quercifolius

Cnidoscolus quercifolius is a common plant species with multiple uses from Brazilian semiarid area (BSA). Their seeds have dormancy. Fact that needs to be resolved in favor of the growing demand produce seedlings this species, mainly for recovery degraded areas BSA. Non-acidic technologies such as water immersion and ultrasound are testing promote uniform emergence vigor many species. The objective paper was test technique promoter C. . Seeds were submitted treatments using 2 x 4 factorial scheme [F1 - Immersion 24 h (without immersion) F2 time exposure (0, 90, 180 270 s)], after they sown bed analyzed 21 days measurements. hours an efficient treatment improve seedlings.