Phosphogypsum and biosynthesized selenium nanoparticles synergistically mitigate cadmium contamination and promote maize growth in wastewater-irrigated alkaline soil

文献类型： 外文期刊

第一作者： Alharbi, Khadiga

作者： Alharbi, Khadiga;Gao, Yan;Hafez, Emad M.;Gao, Yan;Hafez, Emad M.;Elatafi, Essam;Omara, Alaa El-Dein;Gadow, Samir I.;Osman, Hany S.;Alshaal, Tarek;Alshaal, Tarek;Rashwan, Emadelden;Hafez, Emad M.

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关键词： Alkaline soil; Antioxidant enzymes activity; Cadmium stress; Nutritional content; Soil chemical properties; Oxidative stress

期刊名称：PLANT AND SOIL （ 影响因子：4.1； 五年影响因子：4.7 ）

ISSN： 0032-079X

年卷期： 2025 年

页码：

收录情况： SCI

摘要： AimsMaize (Zea mays L.), a critical crop for global food security, is indispensable for livestock feed and human consumption. However, the prolonged use of cadmium-contaminated wastewater for irrigation, particularly in alkaline soil, can cause soil degradation and poses a significant threat to crop production.MethodsThe study tested the combined application of 10 t ha-1 PG and 25 mg L-1 BioSeNPs on maize plants cultivated in Cd-contaminated alkaline soils. Comprehensive assessments were conducted on soil chemical properties, enzymatic activities, plant physiological responses, and nutrient content in leaves.ResultsThe co-application of PG and BioSeNPs significantly reduced Cd bioavailability in the soil and its accumulation in maize roots, shoots, and grains. Soil Cd levels decreased by 33.01%, accompanied by enhanced soil enzymatic activities and improved soil respiration. Physiological stress markers, including malondialdehyde (MDA) and hydrogen peroxide (H2O2), were reduced by 34.61%. Additionally, chlorophyll content, stomatal conductance, and net photosynthetic rate increased by 54.23%, 54.28%, and 93.80%, respectively. The nutritional content of essential elements-nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg), and selenium (Se)-in maize leaves also showed substantial improvements.ConclusionsThe combined application of PG and BioSeNPs effectively mitigated Cd contamination and enhanced soil health and maize growth. This innovative approach offers a sustainable solution for managing alkaline soils irrigated with Cd-contaminated wastewater.

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