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Wolverhampton Intellectual Repository and E-Theses > School of Applied Sciences > Research Centre in Applied Sciences  > Plant and Environmental Research Group > Distribution of populations of micro-organisms in different aggregate size classes in soil as affected by long-term liming management

Please use this identifier to cite or link to this item: http://hdl.handle.net/2436/109665
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Title: Distribution of populations of micro-organisms in different aggregate size classes in soil as affected by long-term liming management
Authors: Janusauskaite, Dalia
Ozeraitiene, Danut
Fullen, Michael A.
Citation: Acta Agriculturae Scandinavica, Section B - Plant Soil Science, 59 (6):544
Publisher: Taylor & Francis
Journal: Acta Agriculturae Scandinavica, Section B - Plant Soil Science
Issue Date: 2009
URI: http://hdl.handle.net/2436/109665
DOI: 10.1080/09064710802439800
Additional Links: http://www.informaworld.com/openurl?genre=article&doi=10.1080/09064710802439800&magic=crossref||D404A21C5BB053405B1A640AFFD44AE3
Abstract: This paper presents the results of experiments carried out at the Vezaiciai Branch of the Lithuanian Institute of Agriculture during the period 1996-2004. The effects of long-term liming (at 0.5 rate=3.8 t ha-1 CaCO3 every 7 years and 2.0 rate=15.0 t ha-1 CaCO3 every 3-4 years) on soil chemical properties, aggregate composition and population distribution of micro-organisms and activity of two enzymes across different size classes of soil aggregates (<0.25, 0.25-0.5, 0.5-1.0, 1.0-2.0, 2.0-3.0 and 3.0-5.0 mm) were investigated. The soil of the experimental site is a Dystric Albeluvisol and textural class is sandy loam (sand (2.0-0.05 mm) 51%; silt (0.05-0.002 mm) 34%; clay (<0.002 mm) 15%). Moderate periodical liming at0.5 rate every 7 years enabled us to maintain soil reaction at a low acidity level (pH in KCl 5.5), whereas when the soil was limed intensively at 2.0 rate every 3-4 years topsoil reaction was slightly alkaline: pH in KCl 7.2. Moderate liming (0.5 rate every 7 years) affects an increase in the amount of agronomically-valuable mesoaggregates (especially of 1.0-2.0 and 1.0-0.5 mm size class). Microbe distribution in different aggregate fractions in acid and moderately limed soil were not significantly different. In intensively limed soil, there was an observed tendency of microbe displacement from the smallest aggregate-size classes to the largest (1.0-2.0 mm).
Type: Article
Language: en
Keywords: Aggregate size
Bacteria
Fungi
Long-term liming
pH
Structure
ISSN: 0906-4710
Appears in Collections: Plant and Environmental Research Group

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