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  • Soil aggregation, aggregate stability, organic carbon and nitrogen in different soil aggregate fractions under forest and shrub vegetation on the Loess Plateau, China.

    Author(s) : An ShaoShanMentler, A.Mayer, H.Blum, W. E. H.

    Author Affiliation : State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Northwest A&F University, Yangling, China.

    Author Email : shan@ms.iswc.ac.cn

    Journal article : Catena 2010 Vol.81 No.3 pp.226-233

    Abstract : RevegetationrevegetationSubject Category: Miscellaneous
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    has been reported as one of the most effective counter measures to reduce soil and water erosionwater erosionSubject Category: Natural Processes
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    on the LoessloessSubject Category: Miscellaneous
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    plateau in ChinachinaSubject Category: Geographic Entities
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    . Soil aggregate stabilitystabilitySubject Category: Properties
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    and the distribution of organic carbonorganic carbonSubject Category: Miscellaneous
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    and nitrogen in different aggregate fractions would be affected by different plant communitiesplant communitiesSubject Category: Miscellaneous
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    . The objectives of this study were to elucidate the effects of different plant communities on soil aggregate stability and the distribution of organic carbon and nitrogen in different aggregate fractions in order to prove that the different plant covers enhance soil aggregate stability. Six kinds of soil samples under forest (QuercusquercusSubject Category: Organism Names
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    liaotungensis
    , PopuluspopulusSubject Category: Organism Names
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    davidiana
    , Pinus tabulaeformis, BothriochloabothriochloaSubject Category: Organism Names
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    ), a 14 year abandoned landabandoned landSubject Category: Habitats
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    , and a 19 year bare fallowfallowSubject Category: Miscellaneous
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    soil. Four kinds of soil samples under shrub land (the 24 year old Caragana Korshinskiicaragana korshinskiiSubject Category: Organism Names
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    Kom.; the 14 year old C. Korshinskii Kom., 3 year old abandoned grazinggrazingSubject Category: Miscellaneous
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    land and traditional slopeslopeSubject Category: Properties
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    cropland which is claimed by the farmersfarmersSubject Category: People Groups
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    for production with very low fertilizersfertilizersSubject Category: Commodities and Products
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    ) were collected from the hilly-gully area on the Loess Plateau, which was divided into 0-10 cm and 10-20 cm. We investigated soil aggregate stability and soil aggregate fractions by ultrasonic fractionationfractionationSubject Category: Techniques, Methodologies and Equipment
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    (USAS), and the distribution of organic carbon and nitrogen in different fractions under forest and afforested land, as key indicatorsindicatorsSubject Category: Miscellaneous
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    for soil remediationremediationSubject Category: Miscellaneous
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    through revegetation. The results showed that soil organic carbon (Corg) and total nitrogen (Nt) were strongly increased under forest and artificial shrub land compared to cropland and bare fallow land and were higher in the surface layerssurface layersSubject Category: Miscellaneous
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    (0-10 cm) than in the subsurface (10-20 cm). Soil aggregate stability (SAS) was quite low under bare fallow land and cropping land soils, in comparison with the 4 forest communities. The three main fractions of soil aggregatesaggregatesSubject Category: Miscellaneous
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    , obtained by ultrasonic fractionation, were <63 µm, 63-100 µm and 100-250 µm, which represented approximately 60%, 10% and 10%, respectively. In all land uses, macro-aggregates, 1000-630 µm > 630-250 µm had a higher Corg content than micro-aggregates, 250-100 µm > 100-63 µm ≥63 µm. In comparison to cropland and bare fallow land, forest and artificial shrub can protect and enhance the Corg, Nt and soil aggregate stability. The higher C:N ratio of macro-aggregate fractions indicates a rapid turnover of soil organic carbon in the top soil of forest sites and even on bare fallow and crop land. The narrow range of C:N ratio in micro-aggregates indicates that soil organic carbon in micro-aggregates is more stable than that in the macro-aggregates. We concluded that revegetation of eroded soilseroded soilsSubject Category: Soil Types
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    accelerates soil remediation and rehabilitationrehabilitationSubject Category: Miscellaneous
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    .

    ISSN : 0341-8162

    DOI : 10.1016/j.catena.2010.04.002

    URL : http://www.sciencedirect.com/science?...

    Record Number : 20103201830

    Publisher : Elsevier Ltd

    Location of publication : Oxford

    Country of publication : UK

    Language of text : English

    Language of summary : English

    Indexing terms for this abstract:

    Organism descriptor(s) : BothriochloabothriochloaSubject Category: Organism Names
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    , CaraganacaraganaSubject Category: Organism Names
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    , Caragana korshinskiicaragana korshinskiiSubject Category: Organism Names
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    , PinuspinusSubject Category: Organism Names
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    , Pinus tabuliformispinus tabuliformisSubject Category: Organism Names
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    , plantsplantsSubject Category: Organism Names
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    , PopuluspopulusSubject Category: Organism Names
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    , QuercusquercusSubject Category: Organism Names
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    Descriptor(s) : abandoned landabandoned landSubject Category: Habitats
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    , aggregatesaggregatesSubject Category: Miscellaneous
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    , agricultural landagricultural landSubject Category: Habitats
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    , carboncarbonSubject Category: Chemicals and Chemical Groups
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    , chemical compositionchemical compositionSubject Category: Properties
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    , communitiescommunitiesSubject Category: Miscellaneous
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    , eroded soilseroded soilsSubject Category: Soil Types
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    , erosionerosionSubject Category: Natural Processes
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    , fallowfallowSubject Category: Miscellaneous
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    , farmersfarmersSubject Category: People Groups
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    , fertilizersfertilizersSubject Category: Commodities and Products
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    , forestsforestsSubject Category: Habitats
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    , fractionationfractionationSubject Category: Techniques, Methodologies and Equipment
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    , grazinggrazingSubject Category: Miscellaneous
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    , indicatorsindicatorsSubject Category: Miscellaneous
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    , loessloessSubject Category: Miscellaneous
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    , nitrogennitrogenSubject Category: Chemicals and Chemical Groups
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    , nitrogen contentnitrogen contentSubject Category: Properties
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    , organic carbonorganic carbonSubject Category: Miscellaneous
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    , pinespinesSubject Category: Organism Groups
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    , plant communitiesplant communitiesSubject Category: Miscellaneous
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    , poplarspoplarsSubject Category: Organism Groups
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    , reclamationreclamationSubject Category: Techniques, Methodologies and Equipment
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    , rehabilitationrehabilitationSubject Category: Miscellaneous
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    , remediationremediationSubject Category: Miscellaneous
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    , revegetationrevegetationSubject Category: Miscellaneous
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    , slopeslopeSubject Category: Properties
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    , soilsoilSubject Category: Miscellaneous
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    , soil chemistrysoil chemistrySubject Category: Disciplines, Occupations and Industries
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    , soil organic mattersoil organic matterSubject Category: Miscellaneous
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    , soil structural unitssoil structural unitsSubject Category: Miscellaneous
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    , soil types (anthropogenic)soil types (anthropogenic)Subject Category: Soil Types
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    , stabilitystabilitySubject Category: Properties
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    , surface layerssurface layersSubject Category: Miscellaneous
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    , treestreesSubject Category: Organism Groups
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    , vegetationvegetationSubject Category: Miscellaneous
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    , vegetation typesvegetation typesSubject Category: Miscellaneous
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    , water erosionwater erosionSubject Category: Natural Processes
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    , woody plantswoody plantsSubject Category: Organism Groups
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    Identifier(s) : anthropogenic soil types, eroded sites, fallowing, farmland, fertilisers, oaks, organic matter in soil, pasturing, People's Republic of China, Pinus tabulaeformis

    Geographical Location(s) : ChinachinaSubject Category: Geographic Entities
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    Broader term(s) : PoaceaepoaceaeSubject Category: Organism Names
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    , PoalespoalesSubject Category: Organism Names
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    , commelinidscommelinidsSubject Category: Organism Names
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    , monocotyledonsmonocotyledonsSubject Category: Organism Names
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    , angiospermsangiospermsSubject Category: Organism Names
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    , SpermatophytaspermatophytaSubject Category: Organism Names
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    , plantsplantsSubject Category: Organism Names
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    , eukaryoteseukaryotesSubject Category: Organism Names
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    , PapilionoideaepapilionoideaeSubject Category: Organism Names
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    , FabaceaefabaceaeSubject Category: Organism Names
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    , FabalesfabalesSubject Category: Organism Names
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    , eudicotseudicotsSubject Category: Organism Names
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    , CaraganacaraganaSubject Category: Organism Names
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    , PinaceaepinaceaeSubject Category: Organism Names
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    , PinopsidapinopsidaSubject Category: Organism Names
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    , PinophytapinophytaSubject Category: Organism Names
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    , gymnospermsgymnospermsSubject Category: Organism Names
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    , PinuspinusSubject Category: Organism Names
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    , SalicaceaesalicaceaeSubject Category: Organism Names
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    , MalpighialesmalpighialesSubject Category: Organism Names
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    , FagaceaefagaceaeSubject Category: Organism Names
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    , FagalesfagalesSubject Category: Organism Names
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    , APEC countriesapec countriesSubject Category: Institutions and Organisations
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    , Developing Countriesdeveloping countriesSubject Category: Miscellaneous
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    , East Asiaeast asiaSubject Category: Geographic Entities
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    , AsiaasiaSubject Category: Geographic Entities
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