Influence of Source Variation on Biomass and Survival of Caucasian oak (Quercus macranthera) in Kentia Nursery in North of Tehran

The research was carried out to study the effect of provenance variation on stem length, stem biomass, root biomass and survival ofCaucasian oak (Quercus macranthera) seedlings. The seeds were collected from several seed sources grown in an altitude range of 1800-2000 m a.s.l in Alborz Mountain, both from the northern facing slope, Kordkoy and Chichal, and from the southern facing slope, Roudbarak and Ghostin. The seeds were sown at a randomized completely block design (with three replicates) in a nursery in Tehran (1620 m a.s.l).The results of first growing period showed stem length, stem biomass, root biomass, and survival of seedlings were significantly different. The mentioned characteristics were higher in the Kordkoy provenance than Roudbarak provenance. Seeds collected from Kordkoy provenance) with survival= 91.63% and stem length = 15.69 cm) found to produce the best quality of Quercus macranthera seedlings in nursery.