Abstract
The straw from three different cadmium (Cd) hyperaccumulators (Galinsoga parviflora, Youngia erythrocarpa, and Solanum photeinocarpum) was added to Cd-contaminated soil, and its effects on plant growth and Cd accumulation in loquat seedlings were evaluated. Straw from each of G. parviflora, Y. erythrocarpa, and S. photeinocarpum was added to Cd-contaminated soil before planting seedlings of two varieties of loquat (Dawuxing and Chuanzao). Addition of straw from G. parviflora and S. photeinocarpum increased the root and shoot biomasses of both loquat varieties, compared with that in the control. Addition of straw also increased Cd uptake by loquat seedlings. The treatments could be ranked, from highest Cd contents in roots and shoots of loquat seedlings to lowest, as follows: S. photeinocarpum straw > Y. erythrocarpa straw > G. parviflora straw > control. All three types of hyperaccumulator straw increased the amount of Cd extracted by shoots of two loquat seedlings, with the maximum effect in the S. photeinocarpum straw treatment. Addition of hyperaccumulator straw also resulted in increased soil invertase, urease, and catalase activities to varying degrees. Among the three types of hyperaccumulator straw, S. photeinocarpum straw was the most effective to increase Cd accumulation in loquat seedlings. Therefore, this material has the potential to increase the phytoremediation capacity of loquat seedlings in Cd-contaminated orchards.
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Lin, L., Liao, M., Lv, X. et al. Addition of straw from hyperaccumulator plants to cadmium-contaminated soil increases cadmium uptake by loquat seedlings. Environ Monit Assess 189, 217 (2017). https://doi.org/10.1007/s10661-017-5941-3
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DOI: https://doi.org/10.1007/s10661-017-5941-3