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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

作者: Alharbi, Khadiga 1 ; Gao, Yan 2 ; Elatafi, Essam 4 ; Omara, Alaa El-Dein 5 ; Gadow, Samir I. 6 ; Osman, Hany S. 7 ; Alshaal, Tarek 8 ; Rashwan, Emadelden 10 ; Hafez, Emad M. 2 ;

作者机构: 1.Princess Nourah bint Abdulrahman Univ, Coll Sci, Dept Biol, POB 84428, Riyadh 11671, Saudi Arabia

2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China

3.Minist Agr & Rural Affairs Peoples Republ China, Key Lab Agroenvironm Downstream Yangze Plain, Nanjing 210014, Peoples R China

4.Mansoura Univ, Fac Agr, Dept Pomol, Mansoura 35516, Egypt

5.Soils Water Environm Res Inst, Agr Res Ctr, Dept Microbiol, Giza 12112, Egypt

6.Natl Res Ctr, Agr & Biol Res Inst, Dept Agr Microbiol, 33 EI Buhouth St, Cairo 12622, Egypt

7.Ain Shams Univ, Fac Agr, Dept Agr Bot, Cairo 11241, Egypt

8.Univ Debrecen, AGTC, Plant Physiol & Biotechnol Dept, Agr Bot, H-4032 Debrecen, Hungary

9.Univ Kafrelsheikh, Fac Agr, Soil & Water Dept, Kafr Al Sheikh 33516, Egypt

10.Tanta Univ, Fac Agr, Agron Dept, Tanta 31527, Egypt

11.Kafrelsheikh Univ, Fac Agr, Dept Agron, Kafr Al Sheikh 33516, Egypt

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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