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  • Phosphatase activity in relation to key litter and soil properties in mature subtropical forests in China

    Author(s)
    Hou, Enqing
    Chen, Chengrong
    Wen, Dazhi
    Liu, Xian
    Griffith University Author(s)
    Chen, Chengrong
    Year published
    2015
    Metadata
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    Abstract
    Phosphatase-mediated phosphorus (P) mineralization is one of the critical processes in biogeochemical cycling of P and determines soil P availability in forest ecosystems; however, the regulation of soil phosphatase activity remains elusive. This study investigated the potential extracellular activities of acid phosphomonoesterase (AcPME) and phosphodiesterase (PDE) and how they were related to key edaphic properties in the L horizon (undecomposed litter) and F/H horizon (fermented and humified litter) and the underlying mineral soil at the 0–15 cm depth in eight mature subtropical forests in China. AcPME activity decreased ...
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    Phosphatase-mediated phosphorus (P) mineralization is one of the critical processes in biogeochemical cycling of P and determines soil P availability in forest ecosystems; however, the regulation of soil phosphatase activity remains elusive. This study investigated the potential extracellular activities of acid phosphomonoesterase (AcPME) and phosphodiesterase (PDE) and how they were related to key edaphic properties in the L horizon (undecomposed litter) and F/H horizon (fermented and humified litter) and the underlying mineral soil at the 0–15 cm depth in eight mature subtropical forests in China. AcPME activity decreased significantly in the order of F/H horizon > L horizon > mineral soil horizon, while the order for PDE activity was L horizon = F/H horizon > mineral soil horizon. AcPME (X axis) and PDE (Y axis) activities were positively correlated in all horizons with significantly higher slope in the L and F/H horizons than in the mineral soil horizon. Both AcPME and PDE activities were positively related to microbial biomass C, moisture content and water-holding capacity in the L horizon, and were positively related to soil C:P, N:P and C:N ratios and fine root (diameter ≤ 2 mm) biomass in the mineral soil horizon. Both enzyme activities were also interactively affected by forest and horizon, partly due to the interactive effect of forest and horizon on microbial biomass. Our results suggest that modulator(s) of the potential extracellular activity of phosphatases vary with horizon, depending on the relative C, P and water availability of the horizon.
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    Journal Title
    Science of the Total Environment
    Volume
    515-516
    DOI
    https://doi.org/10.1016/j.scitotenv.2015.02.044
    Subject
    Forestry management and environment
    Publication URI
    http://hdl.handle.net/10072/100801
    Collection
    • Journal articles

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