Crop residue decomposition, residual soil organic matter and nitrogen mineralization in arable soils with contrasting textures

F.J. Matus

    Research output: Thesisinternal PhD, WUAcademic

    Abstract

    <p>To evaluate the significance of cropping, soil texture and soil structure for the decomposition of <sup><font size="-2">14</font></SUP>C- and <sup><font size="-2">15</font></SUP>N-labelled crop residues, a study was conducted in a sand and a clay soil under laboratory and field conditions. The distribution of residual <sup><font size="-2">14</font></SUP>C, residual <sup><font size="-2">15</font></SUP>N and microbial biomass <sup><font size="-2">14</font></SUP>C of different aggregate size classes and physical protection of soil organic matter as indicated by the rates of <sup><font size="-2">14</font></SUP>C and <sup><font size="-2">15</font></SUP>N mineralization after soil disaggregation were also studied in the same soils. Soil texture and soil structure were not determining factors in the decomposition of residual labelled soil organic matter, but residue type was important for N mineralization soon after incorporation. Recently formed labelled soil organic matter was less well physically protected than older soil organic matter and adsorption of soil organic matter on to silt and clay particles was the main mechanism of physical protection in sand soil. In clay soil the results were not conclusive as regards the main mechanism of protection of recently formed soil organic matter. In conclusion because soil structure broken up by soil disruption, and soil texture were found to have no effect on the rate of decomposition of recently formed organic matter in soil, we do not need to include these factors when the C and N mineralization from crop residues in arable soils has to be estimated.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    Supervisors/Advisors
    • Brussaard, Lijbert, Promotor
    • Whitmore, A.P., Promotor, External person
    Award date29 Nov 1994
    Place of PublicationS.l.
    Publisher
    Publication statusPublished - 1994

    Fingerprint

    residual soil
    crop residue
    organic nitrogen
    soil organic matter
    texture
    decomposition
    mineralization
    soil texture
    soil structure
    soil
    clay soil
    sand
    aggregate size
    cropping practice
    silt
    adsorption
    organic matter
    clay
    biomass

    Keywords

    • soil structure
    • organic matter
    • soil
    • soil chemistry
    • carbon-nitrogen ratio
    • cellulose
    • carbohydrates
    • decomposition
    • soil texture
    • soil mechanics
    • particle size distribution

    Cite this

    @phdthesis{dd621cc78417427ab371bed2da5c3a4e,
    title = "Crop residue decomposition, residual soil organic matter and nitrogen mineralization in arable soils with contrasting textures",
    abstract = "To evaluate the significance of cropping, soil texture and soil structure for the decomposition of 14C- and 15N-labelled crop residues, a study was conducted in a sand and a clay soil under laboratory and field conditions. The distribution of residual 14C, residual 15N and microbial biomass 14C of different aggregate size classes and physical protection of soil organic matter as indicated by the rates of 14C and 15N mineralization after soil disaggregation were also studied in the same soils. Soil texture and soil structure were not determining factors in the decomposition of residual labelled soil organic matter, but residue type was important for N mineralization soon after incorporation. Recently formed labelled soil organic matter was less well physically protected than older soil organic matter and adsorption of soil organic matter on to silt and clay particles was the main mechanism of physical protection in sand soil. In clay soil the results were not conclusive as regards the main mechanism of protection of recently formed soil organic matter. In conclusion because soil structure broken up by soil disruption, and soil texture were found to have no effect on the rate of decomposition of recently formed organic matter in soil, we do not need to include these factors when the C and N mineralization from crop residues in arable soils has to be estimated.",
    keywords = "bodemstructuur, organische stof, bodem, bodemchemie, koolstof-stikstofverhouding, cellulose, koolhydraten, decompositie, bodemtextuur, grondmechanica, deeltjesgrootteverdeling, soil structure, organic matter, soil, soil chemistry, carbon-nitrogen ratio, cellulose, carbohydrates, decomposition, soil texture, soil mechanics, particle size distribution",
    author = "F.J. Matus",
    note = "WU thesis 1863 Proefschrift Wageningen",
    year = "1994",
    language = "English",
    publisher = "Matus",

    }

    Crop residue decomposition, residual soil organic matter and nitrogen mineralization in arable soils with contrasting textures. / Matus, F.J.

    S.l. : Matus, 1994. 141 p.

    Research output: Thesisinternal PhD, WUAcademic

    TY - THES

    T1 - Crop residue decomposition, residual soil organic matter and nitrogen mineralization in arable soils with contrasting textures

    AU - Matus, F.J.

    N1 - WU thesis 1863 Proefschrift Wageningen

    PY - 1994

    Y1 - 1994

    N2 - To evaluate the significance of cropping, soil texture and soil structure for the decomposition of 14C- and 15N-labelled crop residues, a study was conducted in a sand and a clay soil under laboratory and field conditions. The distribution of residual 14C, residual 15N and microbial biomass 14C of different aggregate size classes and physical protection of soil organic matter as indicated by the rates of 14C and 15N mineralization after soil disaggregation were also studied in the same soils. Soil texture and soil structure were not determining factors in the decomposition of residual labelled soil organic matter, but residue type was important for N mineralization soon after incorporation. Recently formed labelled soil organic matter was less well physically protected than older soil organic matter and adsorption of soil organic matter on to silt and clay particles was the main mechanism of physical protection in sand soil. In clay soil the results were not conclusive as regards the main mechanism of protection of recently formed soil organic matter. In conclusion because soil structure broken up by soil disruption, and soil texture were found to have no effect on the rate of decomposition of recently formed organic matter in soil, we do not need to include these factors when the C and N mineralization from crop residues in arable soils has to be estimated.

    AB - To evaluate the significance of cropping, soil texture and soil structure for the decomposition of 14C- and 15N-labelled crop residues, a study was conducted in a sand and a clay soil under laboratory and field conditions. The distribution of residual 14C, residual 15N and microbial biomass 14C of different aggregate size classes and physical protection of soil organic matter as indicated by the rates of 14C and 15N mineralization after soil disaggregation were also studied in the same soils. Soil texture and soil structure were not determining factors in the decomposition of residual labelled soil organic matter, but residue type was important for N mineralization soon after incorporation. Recently formed labelled soil organic matter was less well physically protected than older soil organic matter and adsorption of soil organic matter on to silt and clay particles was the main mechanism of physical protection in sand soil. In clay soil the results were not conclusive as regards the main mechanism of protection of recently formed soil organic matter. In conclusion because soil structure broken up by soil disruption, and soil texture were found to have no effect on the rate of decomposition of recently formed organic matter in soil, we do not need to include these factors when the C and N mineralization from crop residues in arable soils has to be estimated.

    KW - bodemstructuur

    KW - organische stof

    KW - bodem

    KW - bodemchemie

    KW - koolstof-stikstofverhouding

    KW - cellulose

    KW - koolhydraten

    KW - decompositie

    KW - bodemtextuur

    KW - grondmechanica

    KW - deeltjesgrootteverdeling

    KW - soil structure

    KW - organic matter

    KW - soil

    KW - soil chemistry

    KW - carbon-nitrogen ratio

    KW - cellulose

    KW - carbohydrates

    KW - decomposition

    KW - soil texture

    KW - soil mechanics

    KW - particle size distribution

    M3 - internal PhD, WU

    PB - Matus

    CY - S.l.

    ER -