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  • Soil carbon and nitrogen pools and microbial properties in a 6-year-old slash pine plantation of subtropical Australia: impacts of harvest residue management

    Author(s)
    Chen, CR
    Xu, ZH
    Griffith University Author(s)
    Xu, Zhihong
    Chen, Chengrong
    Year published
    2005
    Metadata
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    Abstract
    Harvest residue management can affect the dynamics of soil carbon (C) and nutrient pools and associated soil microbial processes. A field experiment was conducted to investigate the impacts of harvest residue management practices on soil C and nitrogen (N) pools in a slash pine plantation grown on a sandy soil of subtropical Australia. Results showed that harvest residue retention significantly enhanced accumulation of soil total C and N compared with residue removal. The NH4+-N was the predominant form of soil mineral N, and there were no significant impacts of residue management practices on concentrations of soil NH4+-N ...
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    Harvest residue management can affect the dynamics of soil carbon (C) and nutrient pools and associated soil microbial processes. A field experiment was conducted to investigate the impacts of harvest residue management practices on soil C and nitrogen (N) pools in a slash pine plantation grown on a sandy soil of subtropical Australia. Results showed that harvest residue retention significantly enhanced accumulation of soil total C and N compared with residue removal. The NH4+-N was the predominant form of soil mineral N, and there were no significant impacts of residue management practices on concentrations of soil NH4+-N measured at the time of sampling. Concentrations of water-soluble and hot water extractable organic C and total N tended to be higher in soil with residue retention compared with residue removal, but this trend was only significant for hot water extractable organic C (HWEOC) in surface soil (0-10 cm). Residue retention also tended to increase soil microbial biomass C and N, but did not significantly affect soil respiration and metabolic quotient (qCO2). Direct C and N inputs into soil from the residue layer and moderation of the variation of soil moisture and temperature over the seasons by harvest residue cover might have contributed to the accumulation of soil C and N and microbial biomass with the residue retention treatments. The lack of statistically significant differences in some of soil microbial properties (e.g. microbial biomass C, respiration, etc.) might have been related to a large spatial variability among replicate plots at the experimental site.
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    Journal Title
    Forest Ecology and management
    Volume
    206
    Publisher URI
    http://www.elsevier.com/wps/find/journaldescription.cws_home/503310/description#description
    DOI
    https://doi.org/10.1016/j.foreco.2004.11.005
    Copyright Statement
    © 2005 Elsevier. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Environmental sciences
    Biological sciences
    Agricultural, veterinary and food sciences
    Publication URI
    http://hdl.handle.net/10072/4335
    Collection
    • Journal articles

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