Investigation on the potential of eco-friendly bio-char for amendment in serpentine soils and immobilization of heavy metals contaminants: a review

Kumar, Arvind; Duraisamy, Revathi; Kumar, Naveen; Verma, Ravikant; Kumar, Agam; Verma, Daneshver Kumar; Jayabalan, Ilakiya; Marwein, Binny M.; Jaiswal, Krishna Kumar

doi:10.1007/s13399-021-02257-4

Cited by 5 publications

(1 citation statement)

References 174 publications

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“…Serpentine soils are home to major mining activity and seldom used for agricultural purposes. Due to their low macronutrients such as N and Ca (Kumar et al,2022) and high metal levels such as Ni and Cr, they are often viewed as "natural wastelands" that compare well with mine tailings that are dumped after mineral processing (See Kumar et al, 2021;Ye et al 2022; Wang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Edaphic and topographic gradients have differential influence on woody species assemblages on ultramafic and non-ultramafic soils in an African Savanna

Nyenda,

Musungwa,

Piyo

et al. 2023

Plant Soil

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Background and aimsUnderstanding the determinants of plant species associations on unique serpentine substrates is crucial for restoration ecology yet understudied. We investigated the in uence of local edaphic and topographic gradients on woody species associations on serpentine and non-serpentine soils along the Zimbabwe great Dyke. MethodsVegetation attributes were assessed in 62 plots located on serpentine and adjacent non-serpentine patches at varying slope magnitude and orientation. Plant community comparisons and relationships with soil and topographic variables were analyzed using ANOVA and ordinations. ResultsAspect had more in uence on woody composition, species associations and densities on-compared with off-serpentine soils. Lower species richness, tree/shrub densities were observed on-serpentine than nonserpentine patches. Soil Mg, Mg/Ca ratio, total Ni, Cr and Mn, and available Ni were signi cantly higher on-Serpentine than off-serpentine patches. All parameters (pH, Ca, Mg, Mg/Ca ratio; available Ni, Cr, Mn and total Mn) were similar between Serpentine east-and west-facing slopes, but only total Cr and Ni were higher on east-facing slopes. Only available Ni and Mn were higher on Serpentine piedmont than on slopes. Tree/shrub density and species richness were positively correlated to available Mn and Cr while negatively correlated to total and available Ni, pH, Mg/ca ratio and herbaceous plant cover. ConclusionVegetation patterns on serpentine substrates are partly driven by intra-site edaphic (metals and Ca/Mg ratios) and topographic gradients. Aspect has differential in uence on woody vegetation assemblages on serpentine and non-serpentine substrates. Combinations of species and environmental determinants observed can be used in mine site rehabilitation planning.

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