Esfandiar Jahantab; reza yari; Yaser Ghasemi Aryan; Maryam Saffari Aman; Hadi Moadab
Volume 29, Issue 3 , October 2022, , Pages 161-170
Naser Baghestani Meybodi; Hosein Arzani; Mohammad Taghi Zare; Jalal Abdollahi
Volume 11, Issue 2 , August 2019, , Pages 137-162
Ahmadreza Panahian; Hamidreza Naseri; Majid Karimpour Reyhan; Mohamad Jafari; Seyed Alireza Hoseini
Volume 23, Issue 1 , June 2016, , Pages 128-137
Abstract
Carbon absorption by plant tissues and sequestration in soil is one of the ways to reduce greenhouse gases in the atmosphere. The cultivation of plants and proper management lead to increased biomass of native plants, increased photosynthesis level and carbon adsorption as well as increasing the amount ...
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Carbon absorption by plant tissues and sequestration in soil is one of the ways to reduce greenhouse gases in the atmosphere. The cultivation of plants and proper management lead to increased biomass of native plants, increased photosynthesis level and carbon adsorption as well as increasing the amount of carbon input to soil.Roadside is among the areas having the ability to absorb carbon with a high ecological potential. The aim of this research was to measure the carbon storage in the sagebrush stands of the Eyvanakey-Garmsar roadside. For this purpose, 10 plots of 120 square meters were randomly established along three transects of 1,000 meters. In each plot, soil profiles were dug at the foot of the plants and the space between them, and soil samples were taken at three depths of 0-10 cm, 10-30 cm, and 30-50 cm in five replications. According to the obtained results, the total carbon sequestration in the soil profile was calculated to be 59.518 tons per hectare, and the total organic carbon stored in the aboveground and underground biomass of sagebrush was equal to 340.8 kg per hectare. To increase carbon sequestration in rangelands, the applied ecosystem management options must be based on three criteria including soil, biomass, and litter. Overall, plant cultivation in the roadside will result in reduced erosion and noise pollution as well as creating ecological corridor, landscape, and microclimate.
Anahita Rashtian; Ali Akbar Karimian
Volume 21, Issue 4 , March 2015, , Pages 747-755
Abstract
Investigation on the vegetation cover of rangelands under grazing and exclosure conditions is important in improvement of range management. Therefore, this research was aimed to investigate the effect of exclosure on production, density, frequency, importance value and vitally of Artemisia sieberi as ...
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Investigation on the vegetation cover of rangelands under grazing and exclosure conditions is important in improvement of range management. Therefore, this research was aimed to investigate the effect of exclosure on production, density, frequency, importance value and vitally of Artemisia sieberi as the most important species of steppe rangelands of Iran. The study was conducted in Nodushan rangelands of Yazd province under grazing and exclosure conditions. Sampling was done randomly in both grazing and exclosure areas, with 10 transects and 40 quadrates of 1m2. In addition, 30 individuals of Ar. sieberi were selected randomly in each area and plant height, maximum and minimum diameter, canopy caver, vitality and dry matter production were measured. According to the obtained results, the studied species showed no significant differences for production, average diameter, height and canopy cover percentage. However, the vitally of Ar. sieberi showed significant differences between grazing and exclosure areas. The results of importance value indicated the increased relative importance of Ar. sieberi under moderate grazing intensity. The distribution pattern of Ar. sieberi under exclosure was uniform while under grazing condition a clumped distribution pattern was observed.
Ali Ehsani
Volume 19, Issue 4 , March 2013, , Pages 737-747
Abstract
The objective of study on phenology of range plant species is to assess the changes of different phenology stages (germination, flowering, seed maturity stages, autumn growth and winter dormancy) in order to adjust range utilization programs, prevention of early or late grazing, recognition of nutritional ...
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The objective of study on phenology of range plant species is to assess the changes of different phenology stages (germination, flowering, seed maturity stages, autumn growth and winter dormancy) in order to adjust range utilization programs, prevention of early or late grazing, recognition of nutritional value of the plant species, determining livestock entry and exit time and seed collection. Artemisia sieberi is a shrubby species with an appropriate forage value distributed as a dominant species in arid and semi arid steppe regions of Iran. It is resistant to drought and relative salinity which widely grows in loamy, sandy and loamy clay soils. In this study, phenological stages of Artemisia sieberi were investigated in six different sites of steppe regions of Iran. Accordingly, data of the phenological stages were recorded for vegetative and reproductive stages respectively in 15-day and 7-day intervals. With regard to the direct relationship between phenological stages and climatic factors especially temperature and precipitation, these data were taken from the nearest synoptic station for each site. According to the results, vegetative growth stage of Artemisia sieberi starts from early March early April and continues to July if moisture is available. The flowering stage starts from early July and continues to late October. Seed ripening stage gradually starts from early September to late January. The start of the winter dormancy is late January which continues to early February. Our results show a long-term phenology for Artemisia sieberi indicating its resistance to environmental conditions. Consequently, comprehensive recognition of phenological stages of Artemisia sieberi as a key species enables us to manage the grazing, adjust the entry and exit time for livestock, grazing intensity and appropriate grazing systems to be applied by range managers and utilizers.
Reza bagheri; Sedegheh Mohammadi
Volume 17, Issue 4 , November 2011, , Pages 538-548
Abstract
Allelopathy is interaction effects of plants on each other through extracted chemical compounds. This phenomenon that has not been considered in range improvement is of important concerns in rehabilitation of rangelands. In this study, we tested allelophatic effects of Artemisia sieberi ongermination ...
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Allelopathy is interaction effects of plants on each other through extracted chemical compounds. This phenomenon that has not been considered in range improvement is of important concerns in rehabilitation of rangelands. In this study, we tested allelophatic effects of Artemisia sieberi ongermination percentage, stem fresh weight and root fresh weight of three species (Agropyron desertorum, Agropyron elongatum and Atriplex canescens) that are widely used in range improvement. Powder of Artemisia sieberi (stem, leaf and root) collected from natural habitats in flowering stage (end of Novambr) was mixed with different concentration levels ( 0%, 0/1 %, 1% and 10 %) in four replicetions and was planted in sand under laboratory condition based on completly rondom design. After putting 25 live seeds of the mentioned species in each pot, three variables as germination percentage, stem fresh weight and root fresh weight were measured and then ANOVA and Duncan's multiple range tests were applied to analyze the data in SPSS software. According to the results decrease rate of germination percentage in comparison to control treatment were as follows :in Agropyron desertorum 60 and 83% from 1 and 10 % leaf concenterations respetively, in Agropyron elongatum 84/2% from 10% leaf concentration and in Atriplex canescens 83/3 and 88/9% from 1 and 10% all tissues concentrations respectively. Also our finding showed that stem weight of Agropyron elongatum was decreased to 48 and 94/5%, respectively in 1 and 10 % of leaf tissue and root weight of Atriplex canescens was decreased to 82/2 and 88/1% in 1 and 10 % of all tissues in comparison to control treatment. According to results of the study under laboratory condition, rehabitating of Artemisia sieberi sites through using the mentioned species probably will not be successful.
Ali Tavili; Mojtaba Janat rostami; Khadejeh Ebrahimi Dorcheh
Volume 16, Issue 3 , December 2009, , Pages 409-418
Abstract
According to importance of Salsola rigida in arid and semi arid regions, also due to Artemisia sieberi allelopathic property, this research was carried out to find whether or not Sa. rigida is sensitive against Ar. sieberi allelochemicals in germination stage when they are planting with together. For ...
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According to importance of Salsola rigida in arid and semi arid regions, also due to Artemisia sieberi allelopathic property, this research was carried out to find whether or not Sa. rigida is sensitive against Ar. sieberi allelochemicals in germination stage when they are planting with together. For this purpose, Sa. rigida seeds were taken from Pakan Bazr Cooperation in Isfahan. Aerial parts of Ar. sieberi were gathered from Jafarieh region in Qom province, dried and powdered. They were mixed with distilled water in a ratio of 1:3 (one part Sa. rigida powder, 3 parts distilled water). Based on standard methods, extracts with different concentrations were prepared. Sa. rigida seeds were put in Petri dishes and watered with different concentrations of the prepared extracts. Experiment was done in a completely randomized design with 4 treatments (0, 25, 50 and 100 percent extractions) and 4 replications. Understudy germination properties were Final Germination percentage (FG), Rate of Germination (RG), Mean period of Final Germination (MPFG) and Percentage of Inhibition (PI). Duration of experiment was 13 days. Results based on statistical analysis revealed that there was significant difference between FG, MPFG, and PI under different extract concentrations effects (P<1%) while for RG difference was significant at 5% probability. Totally, it is concluded that Sa. rigida could be affected by Ar. sieberi allelopathic property in germination stage.