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  • 1
    Electronic Resource
    Electronic Resource
    Importance of soil-water relations in assessing the endpoint of bioremediated soils (1997)
    Springer
    Plant and soil 192 (1997), S. 219-226 
    Details
    ISSN: 1573-5036
    Keywords: barley ; bioremediation ; hydrocarbon ; hydrocarbon contamination ; plant growth ; soil contamination ; soil water ; soil water properties ; water repellency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Much effort has been focused on defining the end-point of bioremediated soils by chemical analysis toxicity tests. However, these tests do not assess the quality, or the capability, of soil to support plant growth after bioremediation. We studied the response of plants to hydrocarbon contaminants by camparing barley (Hordeum vulgare) growth on: (i) control soil, agricultural topsoil, (ii) oil-contaminated soil (40,000 mg kg−1 total extractable hydrocarbons, or TEH), and (iii) oil-contaminated soil treated by bioremediation (20,000 mg kg−1 TEH). Barley growth and yield was significantly reduced by oil-contamination. Bioremediation did not improve yield of barley and shoot dry mass was slightly reduced after bioremediation. The lack of effect from bioremediation is attributed to poor soil water sorption, which was negatively influenced by hydrocarbon residuals. We concluded that the soil-water relation is one of the most important factors in assessing endpoint of bioremediated soils for plant growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004280626976
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Importance of soil-water relations in assessing the endpoint of bioremediated soils (1997)
    Springer
    Plant and soil 192 (1997), S. 227-236 
    Details
    ISSN: 1573-5036
    Keywords: bioremediation ; hydrocarbon ; hydrocarbon contamination ; soil contamination ; soil water ; soil water properties ; water repellency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This study was conducted to investigate water movement in hydrocarbon contaminated soils. Three soils were studied, a hydrocarbon contaminated soil, the same soil after 3 years of bioremediation, and a control soil from the same site. There was a critical soil water content around 18% (bioremediated soil) and 20% (contaminated soil), above which the sorptivity of the contaminated soil was near that of the control soil. For soils with water contents below this value, there was a strong divergence in sorptivity between contaminated and control or bioremediated soils. Results suggest that water availability in contaminated soils will be highly dependent on soil water properties as water potential approaches the permanent wilting point (-1.5 MPa matrix potential). Infiltration of water into air dry (2% m.c. w/w) hydrocarbon contaminated soils was up to three orders of magnitude slower than for the control soil. For air dried soils, the infiltration rate of the contaminated and bioremediated soils was constant with time. This was in contrast to the control soil where infiltration rate was a function of the reciprocal of the square root of time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004232711046
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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