Hosein Tavakoli; Ali Asghar Paryab; Gholamreza Ghaderi; Majid Dashti
Volume 12, Issue 3 , August 2019, , Pages 212-232
Moharam Ashrafzadeh; Hamid Niknahad Gharemakher; Gholamali Heshmati; Mohammadjamal Saharkhiz; Majid Ghorbani Nohooji
Volume 26, Issue 2 , July 2019, , Pages 432-446
Abstract
Clematis ispahanica is a rare, palatable, and endangered species of Iran. In this research, the distribution of this species was investigated in rangelands of Bavanat and Mehriz cities in Fars and Yazd provinces. For vegetation sampling, the study areas were classified and 30 plots (2 × ...
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Clematis ispahanica is a rare, palatable, and endangered species of Iran. In this research, the distribution of this species was investigated in rangelands of Bavanat and Mehriz cities in Fars and Yazd provinces. For vegetation sampling, the study areas were classified and 30 plots (2 × 3 m) were established using random- systematic sampling method in key areas. Soil samples were taken at the depth of 0-30 cm (based on the depth of rooting). Independent t-test was used to compare soil chemical properties of the two regions. Principal component analysis (PCA) was used to determine the most effective factors affecting soil properties of the two regions.The effect of phenological stage, area, and interaction between phenological stage and area on forage quality indices (CP, DMD, ME and ADF) was determined using a General Linear Model (GLM). The interaction of area × phenological stage on forage quality was investigated using a completely randomized design. The results demonstrated that the best spatial distribution pattern of this species was the northern slopes and relatively flat topography. Our results revealed that this species was found in non-saline soil (EC<2), sandy loam, loamy sand and sandy textures with a pH of 8.6-8.9, %0.4-%0.7 organic carbon, %0.09-% 0.13 nitrogen, 13.9-22.1 ppm phosphorus, %42-%59 calcium carbonate, and 2-2.45 mg/lit potassium. The results of PCA indicated that soil organic carbon (OC), electrical conductivity (EC), and acidity (pH) were the most effective components of the soil in two study areas. The results demonstrated that in the growth and flowering stages, forage quality indices of this species in Bavanat area were significantly higher than those of Mehriz area, but in the seeding stage, the study indices in Mehriz area was higher as compared with Bavanat area. No significant correlation was found between soil chemical properties and forage quality indices. Thus, it can be concluded that the effect of climate on forage quality indices is higher than edaphic factors. In general, it can be stated that the high forage quality of C. isphanica can be one of the reasons putting this species at risk of extinction.
Hojat... Khedri Gharibvand; Ghasemali Dianati Tilaki; Mansur Mesdaghi; Manuchehr Sardari
Volume 17, Issue 4 , November 2011, , Pages 532-545
Abstract
Camphorosma monspeliaca is one of the rare species in Chaharmahal va Bakhtiari Province with a distribution of 3500 ha in Doto-Tangsayad. In the current study, distribution of Camphorosma monspeliaca in the province, vegetation and companion species, phenology and relationship ...
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Camphorosma monspeliaca is one of the rare species in Chaharmahal va Bakhtiari Province with a distribution of 3500 ha in Doto-Tangsayad. In the current study, distribution of Camphorosma monspeliaca in the province, vegetation and companion species, phenology and relationship between plant and environmental factors were studied to investigate some ecological characteristics. Although Camphorosma monspeliaca has a large distribution in the studied area, the best distribution pattern was seen in southern and northern aspects as dominant or companion species. Camphorosma monspeliaca is companion with other species in different aspects. According to the results, average of plant parameters differed in different aspects as the most canopy cover and density of Camphorosma monspeliaca were recorded in southern aspect.In view of forage quality, protein content and digestibility of the mentioned species are high. Camphorosma monspeliaca can be established in none saline soils (Ec < 2dsm-1) and alkali soils (7.5<pH<8.5) with a soil texture of clay, clay loam, loam and calcareous soils (20-30%) having a low content of organic matter and gypsum.Among studied elements C, N, Ca and Mg were much higher in the soil under Camphorosma monspeliaca vegetation due to the need of range species and easy access to these elements. In comparison to K and P, Na was higher in Camphorosma monspeliaca because of high sodium adsorption ability in plants of Chenopodiacea with a C4 photosynthetic pathway.In general, study of the mentioned species is essential to consider its multiple uses.
Hosein Tavakoli; Amr ali Shahmoradi; Ali asghar Paryab; Abass ali Farhanghi
Volume 13, Issue 1 , February 2006, , Pages 39-47
Abstract
A vast area of Iran is covered by sand dunes and shifting sands in wich threat the living of habitants in these regions. Biological control is an approprate method for sand dune fixation. So, it is essential to regonize characteristics of psamophyte plant species and introducing suitable speciecs ...
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A vast area of Iran is covered by sand dunes and shifting sands in wich threat the living of habitants in these regions. Biological control is an approprate method for sand dune fixation. So, it is essential to regonize characteristics of psamophyte plant species and introducing suitable speciecs for sand dunes. For this perpose, the ecological characteristics of Ammodendron persicum including phenology, adaptability, soil condition of habitates, response to cutting and grazing, regeneration strategy and seed germination were studied . Ammodendron persicum is a shrub and psamophyte plant with the age of 10 to 50 years. Phenoligically, the growth started in March, flower in about 7 May and reach to seed maturity by 20 June. The seed shaded after maturity but the duration of plant growth depend to amonnt of annual rainfall. Ammodendron is a drought resistant plant, because it is grow well in an area with an average of 150 mm rainfall per year. Ammodendron regenerates by seed and vegetative propagules. Grazer animals use this plant by end of growing season. In general this plant has approparate ecological characteristies in terms of establishment over sand dune and has perspective for using in other sand dune areas. The later case is under investigation.