فهرس المقالات Range species

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  1 - Investigation of Plant Diversity in Middle Rangelands of Taleghan by Using BIO-DAP
  F. Fahimipoor M. A. Zare Chahouki M. Jafari M. Goldansaz Z. Mohhebi
  Plant Diversity conservation is a main objective in rangelandmanagement. Plant diversity is a suitable index for showing the changes ofvegetation in rangelands and has a high correlation with ecosystem parameters.Therefore, using this index it is possible to find the ch أکثر

  Plant Diversity conservation is a main objective in rangelandmanagement. Plant diversity is a suitable index for showing the changes ofvegetation in rangelands and has a high correlation with ecosystem parameters.Therefore, using this index it is possible to find the changes and manage theecosystem correctly. The current research was performed to determine the speciesdiversity in Fashandak rangelands of Taleghan. To do this, 110 plots each one withan area of 1 m2 were established based on randomized-systematic method anddensity of the species within each plot was recorded. Species properties includingthe related genus and family in addition to life form, growth form and biologicaltype were determined. Shannon, Simpson and McIntosh diversity indexes wereused. Results showed that diversity of Fashandak rangelands could be considered asmoderate. The highest distribution frequency was related to the species of Bromustomentellus, Hypericum perforatum and Thymus kotschyanus. تفاصيل المقالة
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  2 - Comparison of Seed Bed Preparation Methods on Seedling Emergence Rate in Six Range Species in Khash Rangelands of Iran
  A. A. Ameri A. A. Sanadgol
  This study was conducted to compare the methods of seed bedpreparation in rangelands of Khash region in Sistan and Baluchestan province inIran. A split plot design was conducted based on Randomized complete blockdesign with three replications in 1999. Five seed bed prep أکثر

  This study was conducted to compare the methods of seed bedpreparation in rangelands of Khash region in Sistan and Baluchestan province inIran. A split plot design was conducted based on Randomized complete blockdesign with three replications in 1999. Five seed bed preparation methods wereused as main plot as: 1) Seed sown by passing livestock. 2) Seed sown machinery.3) Seeds sown as drilled into furrows. 4) Seeds sowing into furrows covered bystraw mulch .5) Seed sown machinery and pressed by roller. Six range specieswere used as: 1) Artemisia santolina, 2) Eurotia ceratoides, 3) Zygophyllumeurypterum, 4) Astragalus squarrosus, 5) Stipagrostis sp. and 6) Artemisia sieberi, as sub-plot. The results of experiment showed significant differences among theseed bed preparation methods on seedling emergence rate. Astragalus and Eurotiahad higher germination percent when they sown and passing through livestock.Zygophyllum and Eurotia had higher germination by machinery seeder followedby roller. The lowest germination percent was obtained by method of seed sowingin furrows covered by straw mulch and seeds were sown machinery. Among thespecies, Eurotia, Zygophyllum and Astragalus were ranked in the first orderfollowed by Artemisia. The Stipagrostis species. Had no germination for all ofseed bed treatments. تفاصيل المقالة
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  3 - Investigation of Habitat Characteristics and Phenology of Five Range Species in Highlands of Kashan, Iran
  Seyyed Morteza Abtahi Ehsan Zandi Esfahan
  Knowledge on habitat characteristics and nature of regional vegetation inrangelands is a prerequisite for any planning and proper range management along withsustainable development of renewable natural resources. Rangelands in southern andwestern highlands of Kashan, Ir أکثر

  Knowledge on habitat characteristics and nature of regional vegetation inrangelands is a prerequisite for any planning and proper range management along withsustainable development of renewable natural resources. Rangelands in southern andwestern highlands of Kashan, Iran are of good vegetation diversity but unfortunately,palatable and desirable species are endangered in recent years. This research aims toinvestigate habitat characteristics and phenology of five range species including Prangoslatiloba, Prangos uloptera, Ferula ovina, Astragalus eriopodus and Onobrychismelanotricha. Several field studies were conducted and the distribution of each species inhighlands of Kashan was determined using topographic maps, land capability, and GPS.Ten key species were selected in each region to study their phenological stages includingvegetative growth, flowering, seed maturity, and seed dormancy. In spring, summer andautumn, 15-day visits and a 30-day visit in winter were performed. Finally, the distributionof each species and phenological stages were presented in maps and graphs. Our resultsshowed that the dormancy period in most species started from early August and continueduntil late March. As temperatures rise in late March, vegetative growth starts and continuesuntil mid-May. Flowering stage was in a period of mid-May and the end of June;afterwards, seeding stage and seed dispersal have started. تفاصيل المقالة