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  • Biochar Characteristics and Effects on Phosphorus Availability and Dynamics in Tropical Soils

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    Zhang,H_2016_01Thesis.pdf (3.042Mb)
    Author(s)
    Zhang, Hanzhi
    Primary Supervisor
    Chen, Chengrong
    Other Supervisors
    Boyd, Sue
    Gray, Evan
    Year published
    2016
    Metadata
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    Abstract
    Phosphorus (P) is a limiting nutrient for crops in many parts of the world, especially in the tropics, due to low P availability in soils. Biochar has attracted increasing attention as a potential soil conditioner, due to its ability to increase P availability in soils. However, how biochar contributes to P availability and influences P transformation in soils is largely unknown. This PhD research project (a) investigated changes in biochar characteristics as a function of feedstock type and pyrolysis temperature, including biochar chemical composition and structures; (b) assessed P availability in four biochar thermosequences ...
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    Phosphorus (P) is a limiting nutrient for crops in many parts of the world, especially in the tropics, due to low P availability in soils. Biochar has attracted increasing attention as a potential soil conditioner, due to its ability to increase P availability in soils. However, how biochar contributes to P availability and influences P transformation in soils is largely unknown. This PhD research project (a) investigated changes in biochar characteristics as a function of feedstock type and pyrolysis temperature, including biochar chemical composition and structures; (b) assessed P availability in four biochar thermosequences and P transformation during pyrolysis using a sequential extraction scheme in combination with 31P NMR studies; (c) assessed the ability of different biochars to retain phosphate and investigated corresponding retention mechanisms, and (d) investigated effects of biochar amendments on P availability and transformation in tropical soils under precisely-controlled laboratory conditions, over a short time period (12 weeks), and under field conditions over a longer time period (≥1 years).
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    Thesis Type
    Thesis (PhD Doctorate)
    Degree Program
    Doctor of Philosophy (PhD)
    School
    Griffith School of Environment
    DOI
    https://doi.org/10.25904/1912/2043
    Copyright Statement
    The author owns the copyright in this thesis, unless stated otherwise.
    Item Access Status
    Public
    Subject
    Phosphorus
    Biochar
    Peanut shell as biochar
    Sugarcane as biochar
    Soils, Tropical areas
    Publication URI
    http://hdl.handle.net/10072/365362
    Collection
    • Theses - Higher Degree by Research

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