Superação de dormência de sementes de erythrina velutina willd.

Abstract

The germination of seeds of many species of the semiarid region is poorly studied and is considered of great importance to aid in the production of seedlings for reforestation programs. In this sense, the research was conducted in the Laboratory of Ecology and Botany of UFCG / CDSA campus of Sumé-PB, aiming to determine the best method of breaking dormancy of seeds of Erythrina velutina Willd. in riparian areas of Caatinga. For testing dormancy seven pre-germination treatments were used: control - intact seeds (T1); mechanical scarification on sandpaper in 80 next to the hilum (T2); mechanical scarification near the hilum with soaking in water at room temperature for 72 hours (T3); Scarification on both ends without soaking (T4); Scarifying the two ends with immersion in water at room temperature for 72 hours (T5); Immersion in water at room temperature for 72 hours (T6); and mechanical scarification on sandpaper in 80 opposite the micropyle (T7) and evaluated parameters: germination, speed of germination, seedling length and seedling dry matter. According to the data obtained it was found that manual scarification with sandpaper no. 80 opposite the micropyle and both ends without immersion was considered the most effective treatment to break dormancy of seeds of this species in the semiarid region.