The Phytosociological investigation of summer-rangeland of Bonehabad goghar- in Baft

In this study, from the viewpoint of phyto – sociologic, the country pastures of Beneh Abad from Baft of Kerman were studied for distinguishing and determining the vegetable societies of this region which were also the most effective factor from several environmental factors. The sampling, based on the Blank – Broun School (Zurich – Mounilieh), was done by a selective method with 56 sample plots (parts) and the area of sample plots was determined by using the minimum level method. In the studied area, 48 species belonged to 40 genera and 22 families and also the biological forms were determined by Rankayar method. Vegetable cover and the environmental factors including physical, chemical and physiographic properties of soil based on the school of Broun – Blank sociological (by the method of Goonoo), bilateral analysis of index species (TWINSPAN) and the common comparative analysis (CCA) were studied. Based on the school of Goonoo method, four vegetable societies were determined as the following: Acanthophyllo glandulosei-Brometum tomentelli, Rhamnetum oleoidis, Acantholimono scorpii-Astragaloretum siliquosi, Medicagini sativae-Brometum tomentelli Using the bilateral analysis method index, in order to determine the index groups, four ecologic groups were distinguished. The most effective environmental factors in distinguishing ecologic groups based on the common comparative analysis, azoth percentage, carbon, phosphor, potassium, height from sea level and slope were determined. In studying the rate of similarity among different vegetable societies which was determined based on the Jakard similarity coefficient, it was determined that vegetable societies of this region has a relatively high variety. This issue has been indicative of environmental considerable changes or the effectiveness of different parts of this region against the resulted changes or transformations from human involvement in this region surface.