تعيين جدول حجم مناسب براي كاج تدا در شمال ايران

Volume table estimation for loblolly pine (Pinus taeda) in the north of Iran

The Loblolly pine (Pinus taeda) is one of the exotic and main species which is planted in the Gilan province. In total 150 sample units were collected from the Pinus taeda stands in the Lakan area. The llohenadl-Kernnʹs regression model with r = 0.9591 is used to produce one factor volume table of the Pinus taeda. The W. H. Meyerʹs model with r = 0.9826 is used to produce two factors volume table of the Pinus taeda in the north of Iran. These tables are evaluated using 12 trees in the study area. The accuracy of these models are 3.53 and 1.53 percent. Null hypothesis are carried out to test the equality of variance and mean of estimated (VI , V2 ) and real (Vr) volumes of the measured trees. The null hypothesis are not rejected at the level of a= 0.01 . It means, the estimated and real volume of the measured trees are not significantly different in this study.