بررسی عوامل موثر بر پراکنش گون های پسته وحشی در استان یزد

Yazd provience containes 7.6 million hectars of arid and semiarid zoons located in center of Iran ( mostly desert)., Drought condition of Yazd caused a pour vegetation cover. Only a few numbers of speces have adapted themselves to be survive there. Same woody plants (trees and shrubs) are exist in the area of rigion with better climatie condition . Wild pistacia with tow speces called Banah( pistacio atlantica subsp mutica)(B) and Khinjuk (pistacio khinjuk)(K) can be observed with a good distribution in the area of about 570000 hectars . In geology points of view this area is related to central plateau and a small parts with more favorable condition is relater to cantinious Zagaros mountains, where is located in the south ofYazd with 1500 - 2500 high. We studied the ecologycal factors effecting on distribution of B and K including high of regions , slope, climate, geology and soil characteristics. In addition the accompaned woody plants were also evaluated. The results showed that K has located in the area with high of 1500 - 2000 andB has loccoted in the area with high of 1500 - 2500 m respectively . Khinguk generally can be found on lands with steep slops while Banah is seen at slow slopes even less than one percent. The climate condition is arid and semiarid with annual precipitation of 80 - 260 mm. The accompained woody plantswere :"Amygdalus scoparia'\ "Amygdalus lycioides", "ficus Sp " , "Cotoneaster nummuloria " , " Zygophyllum eurypterum " and " Acer Sp. " Key words: ecological conditions, Yazd province. pistacio atlantica subsp mutica, pistacio khinjuk

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پسته ها ، یزد ، پوشش گیاهی ، بوم شناسی گیاهی