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    • Journal of Range Management, Volume 56 (2003)
    • Journal of Range Management, Volume 56, Number 3 (May 2003)
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    Biological and chemical response of a grassland soil to burning

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    Author
    Picone, L. I.
    Quaglia, G.
    Garcia, F. O.
    Laterra, P.
    Issue Date
    2003-05-01
    Keywords
    Actinomycetales
    Paspalum quadrifarium
    soil bacteria
    carbon
    soil nutrient dynamics
    Paspalum
    grasslands
    soil fertility
    fire ecology
    nitrogen
    prescribed burning
    phosphorus
    biomass
    range management
    seasonal variation
    Argentina
    Paspalum quadrifarium
    fire
    microbial biomass
    soil nutrients
    flooding pampa
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    Citation
    Picone, L. I., Quaglia, G., Garcia, F. O., & Laterra, P. (2003). Biological and chemical response of a grassland soil to burning. Journal of Range Management, 56(3), 291-297.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643441
    DOI
    10.2307/4003821
    10.2458/azu_jrm_v56i3_picone
    Additional Links
    https://rangelands.org/
    Abstract
    Changes in soil nutrient pools and microbial activity due to fire are important for understanding the availability of nutrients to plants. The objective of this study was to evaluate the effect of fire: 1) on size and seasonal dynamics of labile pools of C and N in a short-term after burning; and II) on chemical properties and microbial diversity immediately after fire, in a grassland with Paspalum quadrifarium Lam. Microbial biomass C and N tended to be higher in the burned (433 mg C kg-1 and 37 mg N kg-1) than in the unburned treatment (386 mg C kg-1 and 26 mg N kg-1). Both microbial biomass, decreased at the beginning of the growing season and then recovered at the end of the season. Levels of mineralizable C and N were similar in both treatments; however they showed different patterns of seasonal transformations. At initiation of plant growth, concentration of mineralizable C decreased while amount of mineralizable N increased; but the opposite occurred at the end of the growing season. Increases in microbial biomass coincided with low levels of mineralizable N and high concentrations of mineralizable C, suggesting a higher immobilization at the end of the season. Immediately after burning, organic C and N decreased by 11 and 7%, respectively. Mineral N was almost double, available P increased by 10 mg kg-1; but exchangeable bases, bacterial and actinomycetes population, and urease activity were not affected by burning. Fire can induce immediate changes to the soil; however, long-term studies will be required to evaluate the duration of the effect of fire on soil biological processes and nutrient transformations.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003821
    Scopus Count
    Collections
    Journal of Range Management, Volume 56, Number 3 (May 2003)

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