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Effect of biochar on the nutrient contents and metal recovery efficiency in sorghum planted on landfill soils

Oziegbe, Olubukola and Aladesanmi, O. T. and Awotoye, O. O. (2018) Effect of biochar on the nutrient contents and metal recovery efficiency in sorghum planted on landfill soils. International Journal of Environmental Science and Technology. pp. 2259-2270. ISSN 1735-1472

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The study investigated the quality and bioaccumulation of selected heavy metals in sorghum grown in biochar‐treated landfill soils. Composite soil samples were collected from the three main landfill sites in Lagos State, Nigeria. All soil samples were obtained at 0–15 cm soil depth, and a control site was established at 3 m downstream of each of the site. The soil samples were air‐dried and analysed for physico‐chemical properties and metals concentrations using standard methods in the laboratory. Sorghum seeds were planted in five landfill soil pots, treated with wood biochar at 5 t ha−1 interval, from 0 to 20 t ha−1, and replicated thrice for each soil in a completely randomized design approach for a screenhouse experiment. The plants were harvested at 12 weeks after planting and later oven‐dried at 70 °C for 48 h before they were digested and analysed. The results showed that Cu and Pb concentrations in the landfill soils exceeded standard guidelines for agricultural soils, but these reduced with biochar application rate in the soils. Biochar applications at 10–15 t ha−1 also produced the best growth performance and tissue nutrient in the sorghum. Assessment of the biomass efficiency indicated greater performance in the capacity to immobilize more metals concentrations at 20 t ha−1 and was worse at 5–10 t ha−1 biochar applica

Item Type: Article
Subjects: Q Science > QH Natural history
Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Medicine, Health and Life Sciences > School of Biological Sciences
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 10 Dec 2019 13:08
Last Modified: 10 Dec 2019 13:08

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