Roja Safaian; Hosein Azarnivand
Volume 17, Issue 2 , September 2010, , Pages 331-339
Abstract
Prangos ferulacea (L.) Lindly as one of the best Iran`s range plants, is the dominant species of Iranian Jashirzar. Competitive harvesting, lack of attention to vegetative conditions and their habitats caused a disturbance on its reproduction and also the degradation of its habitats. Since the regeneration ...
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Prangos ferulacea (L.) Lindly as one of the best Iran`s range plants, is the dominant species of Iranian Jashirzar. Competitive harvesting, lack of attention to vegetative conditions and their habitats caused a disturbance on its reproduction and also the degradation of its habitats. Since the regeneration of the plant is only done in the natural habitats and through its seeds _when having in mind its deep dormancy as a member of umbelliferae family, it seems necessary to study and investigate the methods of breaking the seeds dormancy in order to protect the species . In this research in order to determine the best methods of the breakage of the seeds dormancy, the effect of some factors such as darkness, lightening, coldness, washing and temperature on the breakage of the dormancy of Prangos seeds_ collected from Fars Province pastures _is analyzed. For this purpose, a completely randomized design with three replications and five treatments was done. The results showed that treatments of coldness, lightening and 10°C temperature in compare to other treatments have significantly influenced the breakage of the species' seed dormancy. Meanwhile these methods are more important when we remind that, they are more economical and safe for the embryo in compare to other treatments such as using chemicals (specially acids). All of these together make these treatments practical methods.
Jamal Hasani; Amrali Shahmoradi
Volume 14, Issue 2 , January 2007, , Pages 171-184
Abstract
Autecology's studies on plant are conducted to investigate about the relationships between a particular plant and other components of ecosystem. Ecological knowledge about range plant species are essential for rehabilitation, and management of rangelands. This study was accomplished to provide information ...
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Autecology's studies on plant are conducted to investigate about the relationships between a particular plant and other components of ecosystem. Ecological knowledge about range plant species are essential for rehabilitation, and management of rangelands. This study was accomplished to provide information about ecological characteristics of range plant of prangos ferulacea from 2001-2004 in Kurdistan Province. In the survey, some topographic, climatic and edaphically aspects, as well as boundaries of the ecological habitats of this species were delineated. Phonological stages, root system, crown cover, density, reproduction, adequate depth for seed planting, preference value of this plant were evaluated. The results showed habitats from view point of crown cover not significant difference at ά ≤ 0.05, but from aspect of density and regeneration were significant difference between of them at ά ≤ 0.05 & 0.01. The highest average of plant density achieved in Daraki 16.7 in 4 square meter and lowest density in Ariz 6.5 plant in 4 square meters. The Daraki habitat’s from aspect of plant regeneration with 13.3 plants in 4 square meters was better than the other, and Shian has the lowest regeneration (3.1 plant). Phonological stages showed that this plant has a short period of growth and starts in April and continues still early August. Soil texture and soil depth were affected on root grow and development. In Khan and Ariz habitats, penetration of root were 140 & 177.5 centimeters, whereas this parameter measured in Shian and Daraki 146.7 & 77.75 centimeters, sufficient depth for seeding Prangos ferulacea was 4 centimeter. Average of thousand Seed weight 212 gram was measured. Plant mostly grows at 500 mm. rainfall, 1700-2300m.above sea level and northern slopes in Kurdistan. Test of soil texture indicates that this plant grows in different soils, especially clay soil texture .Finally this plant has an important role in rangelands by having forage production and soil conservation.