Keywords:
- Capparis spinosa
- water-soluble salts
- Aral Sea basin areas
- powder X-ray diffractometer
- salinity
Abstract
This research work aims to determine the amount and composition of soluble salts in the water extracted from the soil in regions where the Prickly caper bush (Capparis spinosa L.) plant grows, specifically in the Samarkand, Surkhandarya, Tashkent regions, and the Aral Sea basin areas of Uzbekistan. The composition of soluble salts in the water extracted from the soil of these areas was studied using a powder X-ray diffractometer. The amount of soluble salts in the water from the soil of these four regions decreases in the following order: Aral Sea basin (0.87%) > Surkhandarya (0.71%) > Tashkent (0.59%) > Samarkand (0.39%). In the water extracted from the soil of the Aral Sea basin, the most prevalent soluble salt is magnesium phosphate, which constitutes 30.9%. In the Surkhandarya region, magnesium sulfate makes up 34.4%, while in the Tashkent and Samarkand regions, calcium phosphate comprises 22.0% and 23.7%, respectively. Among the soluble salts extracted from the soil of these four different regions, sodium chloride, which negatively affects plant growth, was found in the highest percentage in the Aral Sea basin and Surkhandarya regions (8.2% and 6.9%, respectively). The lowest percentage of sodium chloride was found in the Tashkent region (0.4%). Additionally, sodium sulfate was most prevalent in the Aral Sea basin region, constituting 22.0%.
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