Moharam Ashrafzadeh; Hamid Niknahad; Mohammadjamal Saharkhiz; Majid ghorbani Nohouji; Gholamali Heshmati
Volume 26, Issue 3 , September 2019, , Pages 629-639
Abstract
Clematis ispahanica Boiss is a rare species of Ranunculaceae family, which has forage and medicinal value. The seeds of this species have a very low germination percentage because of dormancy. Therefore, increasing their germination percentage by laboratory methods can be effective in restoring this ...
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Clematis ispahanica Boiss is a rare species of Ranunculaceae family, which has forage and medicinal value. The seeds of this species have a very low germination percentage because of dormancy. Therefore, increasing their germination percentage by laboratory methods can be effective in restoring this plant. In the present study, considering the seed size of C. ispahanica , H2SO4 (96% ) for 5 , 10, 20 seconds , hot water (70 and 90 °C .) for 15 minutes, ethanol (96%) for 48hours, HCL ( for 2, 4 and 6 minutes), KNO3 (0.2%) for 48 hours, NaCl (50 milli molar) for 48hours, and scarification using sandpaper were tested to break the seed dormancy. Moreover, the seeds of this species were planted in different depths (1, 1.5 and 2.5 cm) and densities (30, 50 and 70 seeds per square meter). Data analysis was performed using SPSS software version 18 and by univariate analysis of variance and the Duncan test. According to the results, the most effective treatments to improve germination percentage and rate were KNO3, NaCl and scarification treatments. The depth of planting had a significant effect (P<0.05) on the germination percentage, but the density of planting had no significant effect on the germination percentage (P> 0.05). Due to the lack of use of chemicals in scarification using sandpaper treatment, it has an advantage over other effective treatments, recommended to break seed dormancy and increase its germination percentage. Considering the weight of a thousand seeds (3.73gr), 1.12 kg/ha seed (equivalent to 30 seeds per square meter) in the depth of 1.5 cm is proposed for the planting of this species in the study area.
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.
Moharam Ashrafzadeh; hamid niknahad; fazlolllah ahmadi mir ghaed; somayeh jafari
Volume 23, Issue 3 , January 2017, , Pages 636-644
Abstract
The use of nature in a way that is least harmful to the environment and the best efficiency is achieved for humans is possible when all factors and phenomena involved in environment are considered in the planning of land.For this purpose, this research was aimed to assess the ecological capability for ...
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The use of nature in a way that is least harmful to the environment and the best efficiency is achieved for humans is possible when all factors and phenomena involved in environment are considered in the planning of land.For this purpose, this research was aimed to assess the ecological capability for the rangelands of Lar city in the Baluch region using the Analytic Hierarchy Process (AHP) based on the principles of land use planning. Initially, the information layers including vegetation, climate, geology, landform, soil, and erosion were prepared in Arc GIS. Then, the weighting of evaluation criteria was performed in the Expert Choice software based on the Analytic Hierarchy Process (AHP). In the next step, the weights of evaluation criteria were extended to the layers and analysis was performed in Idrisi. According to the obtained results, the ecological capability of the study rangelands for range management development was classified into five classes, namely high suitable (78.5 ha), suitable (321ha), moderately suitable (71.25 ha), low suitable (172 ha), and not suitable (1445.4 ha), respectively. In addition, our results showed that attention to climatic and edaphic conditions as well as socio-economic issues are important and necessary for the implementation of any range management plan in this region.