Hadi Pirasteh-Anosheh; Mehdi Shiran Tafti; Farhad Dehghani; Gholamhasan Ranjbar
Volume 28, Issue 3 , October 2021, , Pages 507-519
Abstract
In current research, some soil properties and growth of camelthorn (Alhagi maurorum Medik.) were monitored in saline lands in Yazd Province during 2019-2020 and accordingly, the ability of this species was determined for growing in the saline lands. For this purpose, seven rangelands in Yazd consisted ...
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In current research, some soil properties and growth of camelthorn (Alhagi maurorum Medik.) were monitored in saline lands in Yazd Province during 2019-2020 and accordingly, the ability of this species was determined for growing in the saline lands. For this purpose, seven rangelands in Yazd consisted of Bafgh, Javadieh, Bahabad, Jolgeh, Ardakan, Aghda and Abarkooh were selected, in which Alhagi was dominant vegetation. Salinity of saturated extract (ECe) and pH of soil, salinity and pH of water, fresh and dry weight were measured by sampling and apparent soil salinity (ECa) was assessed by electromagnetic induction device (EM38). The results showed that regression coefficients (R2) of estimating soil salinity using EM38 device in different regions were accepted and varied between 0.52-0.86. Soil salinity levels varied over the surveyed lands from 2.17 g salt/kg soil in Aghda to 226.5 g salt/kg soil in Ardakan for 0-30 cm soil depth and from 0.4 g salt/kg soil in Bafgh to 118.3 g salt/kg soil in Ardakan for 30-60 cm soil depth. The maximum production of ryegrass, equal to 25 tons ha-1 of fresh weight and 7 tons ha-1 of dry weight, was observed in Bafgh with water salinity of 12 dS m-1 and soil salinity of 11 g kg-1. On average, the highest production was observed in Bafgh, Bahabad, Abarkooh, Aqda and Ardakan, respectively, which was almost consistent with changes in soil salinity and acidity. It seems that Alhagi has high tolerance to water and soil salinity, however, is sensitive to soil pH. The use of EM38 device to evaluate soil salinity in lands with camelthorn cover of Yazd province was reasonably accurate, and is recommended for monitoring soil salinity of other rangelands, but calibration in each area and for each soil depth separately is necessary.
Asghar Mosleh Arany; Gholamreza Bakhshi Khaniki; Bibi ozra Hakimi Bafghi
Volume 19, Issue 4 , March 2013, , Pages 581-589
Abstract
Potassium, sodium and free proline play important roles in adaptation of plant species to arid conditions. Distribution of Na+, K+ and free proline in desert plants is not clear. In this study, the accumulation of Na+, K+ and free proline was investigated in three species namely, Stipagrostis pennata, ...
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Potassium, sodium and free proline play important roles in adaptation of plant species to arid conditions. Distribution of Na+, K+ and free proline in desert plants is not clear. In this study, the accumulation of Na+, K+ and free proline was investigated in three species namely, Stipagrostis pennata, Calligonum polygonoides and Hammada salicornia. These species are naturally distributed in Irano-Turanian region. Six plants were selected from each species in the same conditions, in the dry summer of 2010. Soil humidity measurement showed that all plants were in drought conditions. Half of these plants were irrigated. The quantities of Na+, K+ and proline were determined in the roots and stems of all samples. Results showed that the concentrations of free proline in the stem and root of S. pennata were significantly higher than that of other two species and irrigated S. pennata. Furthermore, the concentration of K+ in the stem of H. salicornia was significantly higher than that of other two species and irrigated H. salicornia. Also, the concentration of K+ in the root of H. salicornia was higher than that of other species, but this concentration was not significantly different from the irrigated species. Sodium, like potassium content was higher in H. salicornia, but significant difference was not observed in its quantity between irrigated and unirrigated species. C. polygonoides after H. salicornia accumulated large quantities of Na+ in its stem. Sodium content was higher in the root of H. salicornia and C. polygonoides in comparison with S. pennata. Results also showed that K/Na ratio was less in roots of unirrigated species in all three species, particularly in S. pennata while it was high in stems of S. pennata H. salicornia compared to irrigated species. Consequently, it was concluded that these three species chose different strategies to cope with drought.