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Effect of fly ash and vermicompost amendment on rhizospheric earthworm and nematode count and change in soil carbon pool of rice nursery

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Abstract

Fly ash application to the soil at lower doses with organic substrates has been advocated by researchers due to its beneficial soil ameliorative properties. But its xenobiotic effects in presence of vermicompost have not yet been studied fully. The hypothesis of the present study was to ascertain the ameliorative effects of fly ash and vermicompost amendment on the soil nematode and earthworm count and change in the soil carbon pool of the rice nursery. The native soil, fly ash, and vermicompost at 0%, 20%, 40%, 60%, 80%, and 100% combinations (by weight) in triplicate were investigated under a factorial complete randomized design. The fly ash affected the earthworm survivability to an extent that the earthworms could not survive in fly ash of concentration greater than 20%. On the contrary, the concentration of vermicompost positively influenced the earthworm and nematode count in the rice rhizosphere. The population of nematodes viz. Rhabditis terricola and Dorylaimids in the rhizosphere of rice nursery was positively linked with the vermicompost concentration, while fly ash had antagonistic effects. The absence of nematodes and earthworms at a higher concentration of fly ash could be linked to the xenobiotic effects of fly ash. However, on mild addition of fly ash and vermicompost (20% each) to the native soil, the carbon stock increased positively to the maximum extent due to the larger surface area of fly ash and its xenobiotic effects limiting respirational carbon loss.

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Acknowledgements

The authors highly acknowledge the supports received from the Sambalpur University, Odisha for conducting such FA remediating research in the FA rich pocket of the Western Odisha, India.

Funding

Post-Graduation Research Grant, Sambalpur University, Jyoti Vihar, Odisha, India.

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Contributions

SKD: conceptualization, visualization, methodology, formal analysis, data analysis, writing—original draft. SKS: review and editing. VCP: writing—original draft, review, and editing. JKM: nematode and earthworm count and data analysis. MB: soil analysis.

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Correspondence to Vimal Chandra Pandey.

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The authors declare no competing interests.

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Responsible Editor: Chris Lowe

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Dwibedi, S.K., Sahu, S.K., Pandey, V.C. et al. Effect of fly ash and vermicompost amendment on rhizospheric earthworm and nematode count and change in soil carbon pool of rice nursery. Environ Sci Pollut Res 30, 124520–124529 (2023). https://doi.org/10.1007/s11356-022-20157-6

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  • DOI: https://doi.org/10.1007/s11356-022-20157-6

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