J. Bio. Env. Sci.3( 12), 160-165, December 2013
The diameter and basal area increments are calculated in a natural oak stands located in Nejo forest in Baneh. For the purpose of this research, a natural stand was chosen, after a field survey. The diameter at breast height (DBH) and height of trees were measured, at 40*40 meters sampling plots. The Point _Quarter method was then used to measure the diameter increment for the 10 years period. Finally radial increment, basal area increment, number of trees per hectare, dominant height and number of regeneration per hectare was estimated and related curves were drowned. The analysis of data shows the following results: Mean annual radial increment with bark and without bark were 2.84 and 2.46 mm corresponding. Mean annual basal area increment for individual trees estimated by specific tables was 8.63 cm2.Mean basal area increment per hectare was 0.5818 m2, Mean basal area per hectare was 23.697m2 and density was 616 trees per hectare.
Rustaqi Ebrahimi M, Jazireii MH. 2003. silviculture of Zagros forests, Tehran University Publications, No. 2633, 560 p.
Rustaqi Ebrahimi M, Biglarbeigy B, Zubairi M. 1992. Sampling Methods for West coppice forests, forestry technical office.
Asli A, Ether E. 1959. Measuring forest increment, Faculty of Agriculture, Tehran University, Issue No. 13, 72 p.
Taban A. 1965. increment of oak and pistacia trees in forests of Dezol & Qalajh west Shahabad. Forest department ] of Kermanshah, 6 p.
Zubairi M. 2000. forest inventory, second edition, Tehran University Publications, No. 2238, 401 p.
Cancino J. 1999. Projection of height & diameter growth & estimation of future volume yield in a silvopastoral trial, Forest ecology and management 123(2-3), 275-285.
Charle J, krebs . 1998. Ecological method , Second e dition , Adison Wesley Longman Inc. 620p.
Chojinachy DC. 1997. Modeling diameter for growth for pinyon and Juniper trees in dryland forests ,,Forest ecology and management 93(1-2), 21-31.
Schweingruber FH. 1998 ,Tree Rings . Kluwer Academic Publishers, 276 p.
Glimore D, Robert S. 1996 . Alternative measure of stem growth efficiency applied to Abies balsamea from canopy position in central Main ,Forest ecology and management 84(1-3), 209-218.
Hannah Piter R. 1999. Species composition & dynamic s in tow hardwood stand in Vermont : A disturbance history ,,Forest ecology and management 120(1-3), 105-116.
Kuulvanine IA, Penttinen A, Leinonen K, Nygren M. 1996.Statistical Opportunities for Comparing Stand Structural Hterogencity in Managed and Primeval Forest: An Example from Boreal Spruce Forest in Southern Finland, Silva Fennica 30, 315-328.