Avaliação da qualidade de mudas de mulungu (Erythrina velutina Willd.) submetidas a diferentes métodos de quebra de dormência

Abstract

Several forest species typical of semi-arid regions are used for afforestation and mulungu among them has great ecological importance. This study aims to evaluate the development of mulungu (Erythrina velutina Willd) seedlings from seeds which have been submitted to different dormancy breaking treatments. The seeds were submitted to eleven treatments: mechanical scarification with sandpaper No. 80 (T1); mechanical scarification with sandpaper No. 60 (T2); hole with soldering iron hole(T3); mechanical scarification with sandpaper No. 60 + immersion in water for 24 hours (T4); mechanical scarification with sandpaper No. 80 + immersion in water for 24 hours (T5); immersion in water at 60 °C for 5 minutes (T6); immersion in water at 80 °C for 5 minutes (T7); immersion in water at 90 °C for 5 minutes (T8); immersion in water for 24 hours (T9); immersion in water for 48 hours (T10) and hole with soldering iron hole+ immersion in water for 24 hours (T11). The treatments applied were efficient in the beginning of development the seedling’s (height, stem diameter and number of leaves), the treatments with water immersion showed better results for the analysis of the total fresh phytomass, divergent results from the literature were found for water scarification treatments, resulting in the least developed seedlings. Thus, it seems clear that of E. velutina dormancy can be overcome with different methods, in order to promote faster germination, and the mechanical scarification more efficient in the initial development of the seedling.

Keywords

• emergência. leguminosa. espécie arbórea