Preliminary results of elimination trial with need- leaved species in Mazandaran forests (Vanamak)

This Paper presents the results of an elimination trial in the form of randomized completely blocks design within 3 replications and 13 treatments (species and provenances of needleleaves) within ten years after establishment in Vanamak forest of Neka regian in Mazandaran province (North of Iran). The altitude of area is 757 meters above sea level and has a humid climate with less then one month dryperiod. Results obtained as the followings: Differences between the average of residual saplings, the average of height, the average of collar diameter, the average of diameter at breast height and the average of quality of saplings in relationship with treatments were significant (P=0.04). The results of 10 years (1992-2001) studies showed that Pinus sylvestris (origin Yugoslavia) was the most promissing species and Pinus sylvestris (origin Armenia), Pinus Ponderosa (originU.S.A) and Pinus nigra var. austriaca (origin Austria) were promissing species, respectively.