جستجوی مقالات مرتبط با کلیدواژه "prosopis" در نشریات گروه "جنگلداری"

Prosopis cineraria Druce (L.) was utilized in this study to assess the environmental contamination in Bandar Abbas. The experimental community encompasses the ecosystems of Dasht Tazian, Bird Garden in the east of Bandar Abbas, Tal Siah and Gachin villages in the west of Bandar Abbas, and the industrial region in order to achieve this strategy. Twenty P. cineraria shrubs were chosen from each community. Heavy metals Zn, Pb, Cd, Mn, and Ni were tested in leaf samples, substrate soil, and industrial dust deposited on leaves. Following the determination of metal concentrations in the samples, the Igeo, CF, MAI, BCF, PLI, and mPELq indices were used to assess the extent of contamination and the ability of P. cineraria shrubs to accumulate metals. The concentrations of Zn, Pb, and Cd in leaves, soil, and industrial dust were found to be greater than the norm. Metal concentrations were higher in the substrate soil samples. The biggest level of heavy metal pollution was found in Tal Siah village, Getchin, Dasht Tazian, and Bird Garden, which are the least and most remote from the industries west of Bandar Abbas. According to the Igeo and CF index, nickel and manganese are unpolluted, however cadmium is a major polluter of ecosystems. The PLI index indicates that Bandar Abbas' ecosystems are contaminated. According to the bioaccumulation index (BCF), mesquite shrubs are intermediate pollution accumulators. The pollutant transfer coefficient from soil to plant in Bandar Abbas habitats ranges between 0.23 and 0.65. It may be inferred that the lands around the factories in Bandar Abbas' west are extremely polluted, but Iranian mesquite shrubs have the potential to accumulate and eliminate industrial pollutants from Bandar Abbas' natural ecosystems and can be employed as a plant technique. Treatment should be applied to safeguard the environment.

Knowing the qualitative and quantitative characteristics of plantation is principal of forest management. Laleh Natural Park in DEZFOUL, with a total area of 9.31 hectares, is located 11 km far from Dezful. The 23-year old stands in the studied park were Eucalyptus and Prosopis. In order to study the number of trees, according to the small levels of the studied stands (pure Eucalyptus 1.9 hectare and mixed with Prosopis 1.7 hectare), the full calipering inventory method was selected and the certain characteristics such as diameter at the breast height and height of all trees. According to the results, the average number of trees in the pure Eucalyptus stand is equal to 110.5 trees per hectare, the average diameter at breast height of stand is 25.22 cm and the average total height is 12.10 m. Also, the average number of species in the mixed Eucalyptus and Prosopis stand is 70.6 trees per hectare, the average diameter at breast height is 27.32 cm and the average total height is 9.57 m. In order to study the effect of Eucalyptus and Prosopis on the soil of the area, 50 soil samples were taken at 2 depth of 0-10 and 10-20 cm from pure and mixed stands and some soil characteristics including texture, moisture and acidity were studies. Soil texture of both stands in this study was loam. There was no significant difference between the two populations in terms of total relative humidity. In terms of acidity, there was a significant difference between two soil depths of 0-10 and 10-20 cm soil in the pure stand which was higher at depth of 10-20 cm.

World anxiousness to earth global warmness brought a special attention to soil's potential for carbon sequestration. The purpose of the trial was to investigate effects of tree plantation on carbon sequestration at arid lands. For this reason, a site at forest park of Dehloran area in Ilam province of Iran was chosen where three tree species, including Eucalyptus camaldulensis, Prosopis juliflora and Ziziphus spina-christi had been planted before. Based on random systematic statistical method, 6- 10 sampling plots of 10 x 10 m. size were allocated for each species at planted and unplanted (control) parts, separately. Soil sampling was made in center of each plot at 0-20cm depth after removing the organic layer of the soil surface to measure carbon sequestration, N, P, K, pH, moisture, bulk density, silt, sand, clay and gravel amount. Results showed that carbon sequestration rate under the trees cover was 117.7 ton per hectare which was about five times more than the control plots (24.82 T/ha). Furthermore, only average carbon sequestration rate under P. juliflora plots was significantly more than under Z. spina-christii plots (p< 0.005). In addition, only average carbon sequestration at high density plots was significantly more than at low density plots under E. camaldulensis species. There was only significant difference between plots outside and inside crown cover of Z. spina-christii in respect to carbon sequestration rate. Overall, it might be concluded that forest plantation at Dehloran area played an important role in reducing atmospheric pollution and its area should be increased at high extent.