مؤسسه ژئوفیزیک دانشگاه تهران فیزیک زمین و فضا 2538-371X 51 4 2026 03 17 Sustainable Restoration of Desert Ecosystems Through BIOGEMI-Based Soil Amendment: Improvements in Chlorophyll Content and Soil Properties in Haloxylon ammodendron Sustainable Restoration of Desert Ecosystems Through BIOGEMI-Based Soil Amendment: Improvements in Chlorophyll Content and Soil Properties in Haloxylon ammodendron 153 165 105308 10.22059/jesphys.2025.394590.1007689 FA Shila Hajehforoshnia Department of Natural Resources Research, Isfahan Agricultural and Natural Resources Research and Education Center (AREEO), Isfahan, Iran. Masoud Borhani Department of Natural Resources Research, Isfahan Agricultural and Natural Resources Research and Education Center (AREEO), Isfahan, Iran. Masoud Tadayonnejad Department of Natural Resources Research, Isfahan Agricultural and Natural Resources Research and Education Center (AREEO), Isfahan, Iran. Majid Hajirasouliha GEO of Nano Vahed Sanat Persia, Isfahan, Iran. Journal Article 2025 05 06 Drought is one of the most significant limiting factor for plant growth in arid regions, and traditional methods such as irrigation and fertilization offer limited effectiveness. In this context, BIOGEMI technology presents an innovative approach to mitigating drought stress by improving the biological and physical properties of soil and increasing its water-holding capacity. This study aimed to evaluate the effects of BIOGEMI on improving soil characteristics and chlorophyll content in Haloxylon ammodendron in the Fesaran area of the Sagzi Plain in Isfahan Province, a region characterized by saline and calcareous soils. The experiments were conducted using 144 Haloxylon seedlings, divided into BIOGEMI-treated and control groups. Parameters such as biomass, chlorophyll content, and relative water content (RWC) were measured and compared between treatments. Soil samples were also analyzed at the beginning and end of the experiments to assess physical and chemical changes. Results showed that chlorophyll a and b levels in the treated plants were 15% and 111% higher respectively, than in the control group, indicating a significant improvement in photosynthesis. The fresh and dry weight of aerial parts increased by 48% and 32.8%, respectively. Soil conditions also were improved after treatment: salinity decreased by 88.6%, and organic matter content increased by 50%. Additionally, the RWC in treated plants was 41.6% higher than in the control group, indicating enhanced drought tolerance. Overall, these findings confirm that BIOGEMI technology can serve as an effective tool for desertification control and the sustainable management of soil and water resources. Drought is one of the most significant limiting factor for plant growth in arid regions, and traditional methods such as irrigation and fertilization offer limited effectiveness. In this context, BIOGEMI technology presents an innovative approach to mitigating drought stress by improving the biological and physical properties of soil and increasing its water-holding capacity. This study aimed to evaluate the effects of BIOGEMI on improving soil characteristics and chlorophyll content in Haloxylon ammodendron in the Fesaran area of the Sagzi Plain in Isfahan Province, a region characterized by saline and calcareous soils. The experiments were conducted using 144 Haloxylon seedlings, divided into BIOGEMI-treated and control groups. Parameters such as biomass, chlorophyll content, and relative water content (RWC) were measured and compared between treatments. Soil samples were also analyzed at the beginning and end of the experiments to assess physical and chemical changes. Results showed that chlorophyll a and b levels in the treated plants were 15% and 111% higher respectively, than in the control group, indicating a significant improvement in photosynthesis. The fresh and dry weight of aerial parts increased by 48% and 32.8%, respectively. Soil conditions also were improved after treatment: salinity decreased by 88.6%, and organic matter content increased by 50%. Additionally, the RWC in treated plants was 41.6% higher than in the control group, indicating enhanced drought tolerance. Overall, these findings confirm that BIOGEMI technology can serve as an effective tool for desertification control and the sustainable management of soil and water resources. https://jesphys.ut.ac.ir/article_105308_2f354f13753c146c627995908e9d6089.pdf