Ardavan Ghorbani; Shahin Shafaee; Mehdi Moameri; Akbar Ghavidel; Ehsan Zandi
Abstract
The aim of this study was conducted to investigate the effect of 25 years old exclosure on the function of aerial and underground organs of Trifolium pratense since may to july of 2017. Three sites inside and three outside of the exclosure were selected in the rangelands in Shoghaldare- Namin rangelands, ...
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The aim of this study was conducted to investigate the effect of 25 years old exclosure on the function of aerial and underground organs of Trifolium pratense since may to july of 2017. Three sites inside and three outside of the exclosure were selected in the rangelands in Shoghaldare- Namin rangelands, Ardabil. Three transects with the length of 100 meters were established in each site and from 10 plots of 1 m2 vegetation characteristics including total production, canopy percentage and forbs canopy were estimated. In order to select T. pratense stand and measure the selected parameters (to study the effect of exclosure on the function of different organs of T. pratense), in addition to previous transects, in each site was randomly established 3 transect of 50 meters. Along each transect, 10 random points and in each point the nearest plant was selected. Length of root, stem, inflorescence, plant height and basal diameter of T. pratense were recorded. Moreover, the inflorescences, stems and roots of the selected T. pratense were cut and after air-drying, they were weighed with a precision scale. Results showed that the total production in the exclosure (2413/06 kg/ha) has significant difference (p < 0/01) with the outside of exclosure (963/84 kg/ha). The production of T. pratense inside exclosure (99.83 kg/ha) has also significant difference (p < 0/01) with outside the exclosure (22.75 kg/ha). Interaction of exclosure and elevation has significant effect on canopy cover (forbs and total), number of inflorescences, basal diameter, weight of plant organs (p < 0/01) and recovery effort (p < 0/05).
mahshid souri; khaled bayazidi; ehsan zandiesfahan; javad motamedi
Abstract
Agropyron desertorum is the most important perennial grasses are semi-arid and temperate areas, which are recommended by natural resource experts to provide forage, pasture, soil stabilization and management of water resources. Awareness of the variation of rangeland species in different environmental ...
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Agropyron desertorum is the most important perennial grasses are semi-arid and temperate areas, which are recommended by natural resource experts to provide forage, pasture, soil stabilization and management of water resources. Awareness of the variation of rangeland species in different environmental conditions is one of the requirements for the reclamation, management and management of rangeland ecosystems. The aim of this study was to investigate effects of drought and contamination on the yield of Agropyron desertorum. The research on greenhouse was conducted in a factorial design based on copper oxide treatments at four levels (0, 25, 50 and 100 mg), copper Nano-oxid in 4 levels (0, 25, 50 and 100 mg) and polyethylene glycol 6000 (PEG6000) in three levels (0, -0.6 and -1/2 mpa) in 5 repeaters on Agropyron desertrorum was conducted in hydroponic greenhouses. The data measuring (biomass, shoot fresh weight, root fresh weight, during the shoot, root K, potassium shoot, chlorophyll a, chlorophyll b and all chlorophyll) by using SPSS.18 and Duncan test were analyzed. The analysis showed all the characteristics measured traits such Agropyron desertorum treated with copper oxide and copper Nano-oxid as well as their interactions in all treatments was significantly reduced compared to control. Agropyron desertorum estates in the areas where the soil has been Nano-oxid and oxides. Also, if the purpose of the cultivation of these species is provide forage for livestock in the affected areas, the cultivation of this species is not suitable and is not recommended.