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  • Short-term effects of prescribed burning on phosphorus availability in a suburban native forest of subtropical Australia

    Author(s)
    Huang, Wenjuan
    Xu, Zhihong
    Chen, Chengrong
    Zhou, Guoyi
    Liu, Juxiu
    Abdullah, Kadum M
    Reverchon, Frederique
    Liu, Xian
    Griffith University Author(s)
    Xu, Zhihong
    Chen, Chengrong
    Year published
    2013
    Metadata
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    Abstract
    Purpose Prescribed burning can alter nutrient availability to plants. Plant growth in tropical and subtropical forests is frequently phosphorus (P) limited. Soil P availability is influenced by a combination of multiple factors including soil chemical and biological properties. The aims of this study were to investigate the short-term effects of prescribed burning on soil P status and to evaluate the key drivers responsible for the variation in soil P fractions. Materials and methods Soil samples were collected at a depth of 0-10 cm at two sites in a suburban native forest. One site (the burnt site) was burned on 11 August ...
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    Purpose Prescribed burning can alter nutrient availability to plants. Plant growth in tropical and subtropical forests is frequently phosphorus (P) limited. Soil P availability is influenced by a combination of multiple factors including soil chemical and biological properties. The aims of this study were to investigate the short-term effects of prescribed burning on soil P status and to evaluate the key drivers responsible for the variation in soil P fractions. Materials and methods Soil samples were collected at a depth of 0-10 cm at two sites in a suburban native forest. One site (the burnt site) was burned on 11 August 2011. The other site (the control site) was not burned but served as a reference. Sampling was conducted at four times: before burning, 12 days after burning (T1), 1 week after T1 (T2), and 1 month after T2 (T3). Soil pH, P fractions, microbial biomass carbon (C) and P, and activities of acid and alkaline phosphatase were measured. Results and discussion Total P was relatively low at both sites compared with other subtropical forests. Microbial biomass P accounted for approximately 10 % of soil total P at the two sites, suggesting that the turnover of microbial biomass is critical for soil P availability. Soil properties at the control site remained unchanged over the time. Soil organic forms of P at the burnt site were decreased by the prescribed burning, and the greatest reduction was found in moderately labile organic P (e.g., NaOH-extractable fractions). Soil inorganic forms of P, however, were not correspondingly increased by the prescribed burning. Microbial biomass P was closely related to the shifts in P fractions. These effects were only detected immediately after the fire. Conclusions Microbial biomass could serve as a sink of P in P-impoverished soils and play an important role in soil P transformation. Our results indicate that microbial biomass is an important factor that governs P status after prescribed burning. The rapid recovery of microbial biomass P could be beneficial to the P requirement for plant regrowth after prescribed burning.
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    Journal Title
    Journal of Soils and Sediments
    Volume
    13
    Issue
    5
    DOI
    https://doi.org/10.1007/s11368-013-0660-z
    Subject
    Earth sciences
    Environmental sciences
    Soil chemistry and soil carbon sequestration (excl. carbon sequestration science)
    Agricultural, veterinary and food sciences
    Publication URI
    http://hdl.handle.net/10072/55401
    Collection
    • Journal articles

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