Department of Soils and Water, Faculty of Agriculture, Al-Azhar University, Assiut 71524, Egypt.
Department of Soils and Water, Faculty of Agriculture, Assiut University, Assiut 71524, Egypt.
Molecules. 2021 Jun 2;26(11):3360. doi: 10.3390/molecules26113360.
Accumulation of heavy metals (HMs) by ornamental plants (OPs) from contaminated agriculture soils is a unique technique that can efficiently reduce the metal load in the food chain. L. has attractive characteristics acquiring a higher growth rate and large biomass when grown at heavy metal contaminated soils. Site-specific detailed information is not available on the use of plant in metal phytoremediation from the polluted sites. The study aimed to enhance the uptake of HMs (Pb, Zn, and Cu) via amending poultry litter extract (PLE), vinasse sugarcane (VSC), and humic acid (HA) as natural mobilized organic materials compared to ethylene diamine tetraacetic acid (EDTA), as a common mobilized chemical agent by plant. The studied soils collected from Helwan, El-Gabal El-Asfar (Cairo Governorate), Arab El-Madabeg (Assiut Governorate), Egypt, and study have been conducted under pot condition. Our results revealed all organic materials in all studied soils, except EDTA in EL-Gabal El-Asfar soil, significantly increased the dry weight of the plant compared to the control treatment. The uptake of Pb and Zn significantly ( > 0.05) increased due to applying all organic materials to the studied soils. HA application caused the highest uptake as shown in Pb concentration by more than 5 times in Helwan soil and EDTA by 65% in El-Gabal El-Asfar soil while VSC increased it by 110% in El-Madabeg soil. Also, an increase in Zn concentration due to EDTA application was 58, 42, and 56% for Helwan, El-Gabal El-Asfar, and El-Madabeg soil, respectively. In all studied soils, the application of organic materials increased the remediation factor (RF) than the control. El-Madabeg soil treated with vinasse sugarcane gave the highest RF values; 6.40, 3.26, and 4.02% for Pb, Zn, and Cu, respectively, than the control. Thus, we identified as a successful ornamental candidate that, along with organic mobilization amendments, most efficiently develop soil health, reduce metal toxicity, and recommend remediation of heavy metal-contaminated soils. Additionally, long-term application of organic mobilization amendments and continued growth of . under field conditions could be recommended for future directions to confirm the results.
观赏植物（OPs）从受污染农业土壤中积累重金属（HMs）是一种独特的技术，可以有效地减少食物链中的金属负荷。当在重金属污染的土壤中生长时，L. 具有吸引人的特性，能够获得更高的生长速度和更大的生物量。关于在受污染地点使用植物进行金属植物修复，没有关于特定地点的详细信息。本研究旨在通过添加家禽粪便提取物（PLE）、甘蔗废糖蜜（VSC）和腐殖酸（HA）等天然可移动有机物质来增强 HMs（Pb、Zn 和 Cu）的吸收，与乙二胺四乙酸（EDTA）相比，后者是一种常见的可移动化学试剂。从埃及的 Helwan、El-Gabal El-Asfar（开罗省）、Arab El-Madabeg（Aswan 省）收集的研究土壤，并在盆栽条件下进行了研究。我们的结果表明，除了 EDTA 在 El-Gabal El-Asfar 土壤中，所有有机物质在所有研究土壤中都显著增加了植物的干重，而对照处理。由于向研究土壤中添加了所有有机物质，Pb 和 Zn 的吸收显著增加（>0.05）。HA 的应用导致最高的吸收，如在 Helwan 土壤中 Pb 浓度增加了 5 倍以上，在 El-Gabal El-Asfar 土壤中 EDTA 增加了 65%，而在 El-Madabeg 土壤中 VSC 增加了 110%。此外，由于 EDTA 的应用，Zn 浓度增加了 58%、42%和 56%，分别为 Helwan、El-Gabal El-Asfar 和 El-Madabeg 土壤。在所有研究的土壤中，与对照相比，应用有机材料增加了修复因子（RF）。用甘蔗废糖蜜处理的 El-Madabeg 土壤的 RF 值最高；分别为 6.40、3.26 和 4.02%，用于 Pb、Zn 和 Cu，高于对照。因此，我们确定 L. 是一种成功的观赏候选植物，它与有机动员修正剂一起，最有效地发展土壤健康，降低金属毒性，并建议修复重金属污染土壤。此外，在田间条件下长期应用有机动员修正剂和继续生长. 可以作为未来的方向进行推荐，以确认结果。
