Pematahan Dormansi Benih Gmelia arborea Roxb. Menggunakan Asam Sulfat (H2SO4)

Gmelina (Gmelina arborea Roxb.) seed is a type of that have physical dormancy. This because water and gases prevent by the hard coat during germination process. Therefore, to break dormancy, preliminary treatment in form scarification required, including using sulfuric acid (H2SO4) solution. study aims determine soaking 96% concentration H2SO4 solution produces best ability. The used completely randomized design method (CRD) with 5 soaked time treatments, namely control (0 minutes), minutes, 10 15 20 minutes each was repeated 3 times 50 seeds for replication. results showed had significant effect on initial germination, last 80% limit percentage vigor index. Soaking gmelina seeds. Keywords: dormancy; pre-treatment; scarification;