Métodos para Quebra da Dormência em Sementes de Leucena Leucaena leucocephala (Lam.) de Wit

Abstract

Leucaena leucocephala seeds were allotted to chemical and mechanical scarification and hot water treatment, to overcome the seed-coat dormancy and to evaluate seedling development, according to a complete randomized design. There was decrease in germination for the control (32.7%) and an increase when seeds were immersed in water with 80°C during 5 and 15 minutes, and concentrate H 2SO 4 during 10, 15 and 20 minutes. The emergency rate index was better in the treatment with water 80°C during 5 minutes and concentrate H 2SO 4 during 20 min. The used treatments to overcome the seed-coat dormancy did not affect the resultant seedling developments.