Pandey, Bhanu Pandey and Singh, Siddharth and Roy, Lal Babu and Shekhar, Sameer and Singh , Ranjeet Kumar and Prasad, Bably and Singh, Krishna Kant Kumar (2021) Phytostabilization of coal mine overburden waste, exploiting the phytoremedial efficacy of lemongrass under varying level of cow dung manure. Ecotoxicol Environ Saf.

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Abstract

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).

Item Type: Article
Uncontrolled Keywords: Chlorophyll fluorescence; Cow manure; Lemongrass; Mine waste; Photosynthesis; Phytostabilization.
Subjects: Envieronmental Management Group
Divisions: UNSPECIFIED
Depositing User: Mr. B. R. Panduranga
Date Deposited: 10 Mar 2021 11:49
Last Modified: 10 Mar 2021 11:49
URI: http://cimfr.csircentral.net/id/eprint/2335

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