A Azadi - PHD.student , Faculty of Natural Resources and Agriculture, University of Mazindaran
S.M Hojati - Associate Prof., Faculty of Natural Resources and Agriculture, University of Mazindaran,
H naghavi - Associate Prof, ., Faculty of Agriculture, University of natseroL Faculty
H Jalilvand - Assistant Prof., Faculty of Natural Resources and Agriculture, University of Mazindaran

Human is interested in achieving a sustainable and new ecosystem through plantation. To assess the soundness of this policy forestation programs are now being promoted to select species with high productivity potential and suitable viable and also consider influence of forestation on soil and other living species such as understory plants together. Toward this purpose for measuring growing characteristics and carbon amount, 100 percent inventory and Also for biodiversity estimation, crown cover percent of herbaceous vegetation in 1 m2 plots beyond 10 selected dominant trees in each stand (average of 4 plots in for directions of each tree) and in gaps was measured. Then for assessment of total situation, average of plots amounts from sub species and gaps were considered as important factors (in general 50 plots for each condition). Results of variance analysis investigation among species showed that at 5 percent possibility among all the species Pinus brutia and Cupressus arizonica Green grew more than other kinds. To assess biodiversity, Cupressus arizonica Green in three conditions of investigation had the lowest amount for diversity and rich indices. On the other hand Pinusbased on biodiversity in general condition can be considered in one group with broad-leaf. This special group have better biodiversity in compression to Cupressus arizonica Green. At last Pinusis suggested as an appropriate kind for forestation in similar regions and also achieving to the aforementioned purposes.

forestation, conifers, broad-leaf, quality and quantity characteristics, biodiversity of understory