Background and purpose: In recent years, forestry projects have gained increasing environmental, economic and social importance as an indicator of development. These projects are one of the most important international activities. Since the establishment of a natural forest in arid and semi-arid regions is a long and complicated process, it is difficult and necessary to restore a deforested forest in these areas. The harsh conditions and nature have reduced the forest ecosystem, so this study aims to present a picture of the status of the current forestry plans with Amygdalus scoparia Spach in four regions of central Bazoft. The intention was to compare the qualitative and quantitative status of forestry in these areas and tested the viability and adaptability of tree and shrub species cultivated in the valleys around the Bazoft river and in the central Bazoft region.
Materials and methods: In this study, the centers of sample plots were 400 m2 ((20 × 20 m) in a completely randomized design. In total, there were 153 plots, and in each sample plot, quantitative characteristics such as mean area of canopy, average height and qualitative characteristics such as vitality and the most important characteristic and survival was estimated. Kaplan-Meier estimator was used to estimate Survival Distribution Function, average survival rate and drying risk in each forest area. The same survival function tests associated with this estimator were also performed to ensure probable segregation of the areas. Analysis of variance was performed in regard to classified factors of the region (in four classes), planting time (in four classes: 1385, 86, 87, 88), Front (in four classes: Four main directions), slope (in two classes: more than 25 Percent and below), elevation and density of primary seedlings. Mean values were compared by Tukey test.
Findings: The results of the comparison of survival rates showed that at a small spatial distance, a significant difference was observed in forestry with a singletree species. The highest survival rate after one decade was 0.88 and the lowest was 0.64. Even two identical tests of survival function i.e. Log-rank and Wilcoxon showed that there was a significant difference between forested areas with Amygdalus scoparia species. Cox Proportional Hazards Model using topographic factors (slope, front and sea level) as covariance using Wald statistic showed that the highest Amygdalus scoparia cultivation risk ratio were the western and northern fronts and then low slope regions.
Conclusion: There was a significant difference between forested areas with Amygdalus scoparia species. Based on the average canopy area, height and freshness of the trees, the southern slopes were perfectly suitable for cultivation, and the western and northern slopes were inappropriate for cultivation of these trees. The other topographic factors that probably influenced the success of the Amygdalus scoparia cultivation (slope and elevation) had not significant effects on the outcome of the Amygdalus scoparia cultivation.
