Caspian Locust (Gleditschia caspica) is a special species in hyrcanian forests. This species has special important with considering of paleology. The conservation of this species is necessary as gene source thus, seedling production and theirs using is essentail in afforestation programming. Current study carried out due to investigation of different treatments for dormancy breaking and germination of Caspian locust seed. For this purpose, mature seeds were collected from Ali Abad Zarin Gol (East North of Iran). Experimental was conducted completely randomized design with eight treatments and three replications. Concentrated Sulphuric Acid in three levels, humidity sand in two levels, seeds soaking in water with two levels and witness treatments were considered.The results show that scarification with Sulphuric Acid treatment with one and half hours time is the best treatment for dormancy breaking of Caspian locust Seed.
