نوع مقاله : مقاله پژوهشی
نویسندگان
گروه زراعت و اصلاح نباتات، پژوهشکده کشاورزی، پژوهشگاه زابل، زابل، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Scophularia striata Boiss plant from Scrophulariaceae family utilize as a disinfectant in the western regions of the country. Spatial distribution and species diversity of Scophularia striata was evaluated in Siahkouh region of Dehloran in 2020 with the aim of determining the appropriate distribution pattern of sampling and selection of the environmental factors affecting the species diversity of medicinal plants. Random sampling carried out according to w pattern in three altitudes (205-605, 605-1005 and 1005-1405 m) and two directs: West and East. Spatial distribution was evaluated by distribution indexes, Taylor and Iwao models and diversity indicators. The results showed the highest value of Taylor and Iwao coefficient in west direction of altitude 605-1005 were 1.05 and 1.06 for Taylor and 1.18 and 1.17 for Iwao respectively, which Iwao model fitted better than Taylor model according to R2 and P obtained from 605-1005 altitude. Other indexes values indicated the most amount of coefficient was in 205-605 m altitude and west direction. There are significant differences between the values of diversity indexes in 3 altitudes and 2 directions of West and East (P≤0.05), too. The most and lowest amounts of Shannon-Weiner index were 0.76 and 1.23 for 205-605 and 1005-1405 m altitudes, respectively. The results showed that spatial distribution of the medicinal plant S. striata was cumulative in different indexes and distribution pattern was randomly, species diversity decreased and uniformity amount enhanced by addition of altitudes.
کلیدواژهها [English]
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