THE SURVEY OF REGENERATION STATUS OF WOODEN SPECIES IN CONTROL AND MANAGED STANDS IN IRAN,S NORTH FORESTSRoya Afrouz, Hamid Payam and Mir Mozaffar Fallahchai
In this study, forest stands in the two control and managed areas in series 7 of Shenroud with respect to qualitative and quantitative characteristics such as species diversity, regeneration, species richness and evenness indices were compared and investigated. Data collection was performed with random-systematic method and fixed network with dimensions of 100 × 125 meters, circular plots with the 500m2 sample pieces and with the criterion of 1:10000 and intensity of 4% were designed and executed on the drawing with GIS and with a view to the specifications of each plot with using GPS the mentioned plots were taken and registered in statistical data collection form. In each sample plot trees with respect to the qualitative characteristics such as chest level diameter, height and the other important parameters were investigated. For taking regenerative information, all seedlings with less and more than 1.30 meters of height in microplots (6.3 square meters) were measured and registered. For testing of the difference between mean of the qualitative parameters and indices in stands, statistical T-test was used. The results showed that there was a considerable difference between amounts of regeneration per hectare in the two stands in the category with the height of more than 1.30 meters. But the difference in the category of less than 1.30 meters of height was not significant. Regeneration diversity, evenness and richness indices in tree species in the category of less than 1.30m of height were considerably better than the category of more than 1.30m and in the category of more than 1.30 meters no considerable difference was observed in the levels of 1% and 5%. Number of regeneration per hectare in the two stands in the category of taller than 1.30 meters had a considerable difference, but the difference in the category of shorter than 1.30 meters was not significant.
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