Natural Resources and Environment Management, CSIR-Central Institute of Mining and Fuel Research, Barwa Road, Dhanbad, Jharkhand 826 015, India.
Ecotoxicol Environ Saf. 2021 Jan 15;208:111757. doi: 10.1016/j.ecoenv.2020.111757. Epub 2020 Dec 9.
A pot study was performed to assess the phytoremedial potential of Cymbopogon citratus (D.C.) Staf. for reclamation of coal mine overburden dump wastes, emphasizing the outcome of amendment practices using cow dung manure (CM) and garden soil mixtures on the revegetation of over-burden wastes (OB). Wastes amendment with cow dung manure and garden soil resulted in a significant increase in soil health and nutrient status along with an increment in the phytoavailability of Zn and Cu which are usually considered as micronutrients, essential for plant growth. A significant increment in the total biomass of lemongrass by 38.6% under CM20 (OB: CM 80:20) was observed along with improved growth parameters under amended treatments as compared to OB (100% waste). Furthermore, the proportionate increases in the assimilative rate, water use efficiency, and chlorophyll fluorescence have been observed with the manure application rates. Lemongrass emerged out to be an efficient metal-tolerant herb species owing to its high metal-tolerance index (>100%). Additionally, lemongrass efficiently phytostablized Pb and Ni in the roots. Based on the strong plant performances, the present study highly encourages the cultivation of lemongrass in coal mining dumpsites for phytostabilization coupled with cow-dung manure application (20% w/w).
进行了一项盆栽研究，以评估香茅草（D.C.）Staf. 在煤矿矸石堆复垦中的植物修复潜力，强调使用牛粪（CM）和花园土混合物进行改良实践对矸石复垦（OB）的植被恢复的结果。牛粪和花园土的废物改良导致土壤健康和养分状况显著增加，同时增加了 Zn 和 Cu 的植物可利用性，Zn 和 Cu 通常被认为是植物生长所必需的微量元素。与 OB（100%废物）相比，在 CM20（OB：CM 80:20）下，香茅草的总生物量显著增加了 38.6%，并且在改良处理下的生长参数得到了改善。此外，随着施用量的增加，同化率、水分利用效率和叶绿素荧光也呈比例增加。由于其高金属耐受性指数（>100%），香茅草成为一种高效的金属耐受草本植物。此外，香茅草在根部有效地稳定了 Pb 和 Ni。基于强烈的植物表现，本研究强烈鼓励在煤矿矸石场种植香茅草，同时进行植物稳定化和牛粪应用（20%w/w）。
