John Wiley & Sons, Ltd.

Biochar amendment to lead contaminated soil: Effects on the fluorescein diacetate hydrolytic activity and phytotoxicity to rice

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The amendment effects of biochar on the total microbial activity was measured by FDA hydrolytic activity, and phytotoxicity in Pb(II) contaminated soils was examined by the application of four different biochars to soil, with rice as a test plant. The FDA hydrolytic activities of biochar‐amended soils were much higher than that of control. The survival rate of rice in lead‐contaminated biochar‐amended soils showed significant improvement over the control, especially for bamboo biochar amended soil (93.3%). In addition, rice grown in lead‐contaminated control sediment displayed low biomass production than that in biochar‐amended soil. The immobilization of Pb(II) and the positive effect of biochar amendment to soil microorganisms may account for these effects. These results suggested that biochar may have excellent ability to mitigate the toxic effects of Pb(II) to the soil microorganisms and rice. This article is protected by copyright. All rights reserved

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