The radial and basal area increment estimation in natural oak stands in northern Zagros (case study: Nejou forests in Baneh)

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Research Paper 01/12/2013
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The radial and basal area increment estimation in natural oak stands in northern Zagros (case study: Nejou forests in Baneh)

Jafar Abdollahpoor
J. Bio. Env. Sci.3( 12), 160-165, December 2013.
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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.


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