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Interactions between vegetation dynamic and edaphic factors in the Great Salt Desert of central Iran

Journal of Arid Land 2021年第2期13卷 123-134页

作者： Hossein BASHARI Seyed Mehrdad KAZEMI Soghra POODINEH Mohammad R MOSADDEGHI Mostafa TARKESH Seyed Mehdi ADNANI Department of Natural Resources Isfahan University of TechnologyIsfahan ***Iran Department of Soil Science College of AgricultureIsfahan University of TechnologyIsfahan ***Iran Forests and Rangelands Research Department Qom Agricultural and Natural Resources Research and Education CenterAgricultural ResearchEducation and Extension Organization(AREEO)Qom ***Iran

Investigating the relationships between vegetation dynamic and edaphic factors provide management insights into factors affecting the growth and establishment of plant species and vegetation communities in saline *** aim of this study was to assess the spatial variability of various vegetation communities in relation to edaphic factors in the Great Salt Desert,central *** vegetation communities were identified using the physiognomy-floristic *** and density of vegetation communities were determined using the transect plot *** soil samples were collected from major horizons of fifteen profiles in vegetation communities,and analyzed in terms of following soil physical and chemical characteristics:soil texture,soluble Na+concentration,sodium adsorption ratio(SAR),electrical conductivity(EC),pH,organic matter content,soluble Mg2+and Ca2+concentrations,carbonate and gypsum contents,and spontaneously-and mechanically-dispersible clay *** analysis was used to investigate the relationships between vegetation dynamic and edaphic *** generalized linear method(GLM)was used to find the plant species response curves against edaphic *** showed that plant species responded differently to edaphic factors,in which soluble sodium concentration,EC,SAR,gypsum content and soil texture were identified as the most discriminative edaphic *** studied plant species were also found to have different ecological requirements and tolerance to edaphic factors,in which Tamarix aphylla and Halocnemum strobilaceum were identified as the most salt-resistant species in the ***,the presence of Artemisia sieberi was highly related to soil sand and gypsum *** results implied that exploring the plant species response curves against edaphic factors can assist managers to lay out more appropriate restoration plans in similar arid areas.

关键词： desert generalized linear method mechanically-dispersible clay ordination plant species response curves spontaneously-dispersible clay

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