Linking organic carbon accumulation to microbial community dynamics in a sandy loam soil: result of 20 years compost and inorganic fertilizers repeated application experiment

H. Zhang, W. Ding, H. Yu, Xinhua He

    Research output: Contribution to journalArticle

    53 Citations (Scopus)

    Abstract

    © 2014, Springer-Verlag Berlin Heidelberg. Repeated compost or inorganic fertilization may increase soil organic C (SOC) but how SOC accumulation relates to changes in soil aggregation, microenvironment and microbial community structure is unclear. Arable soils (Aquic Inceptisol) following a 20-year (1989–2009) application of inorganic fertilizer nitrogen (N), phosphorus (P) and potassium (K) (NPK), fertilizer NP (NP), fertilizer NK (NK), fertilizer PK (PK), compost (CM), half compost N plus half fertilizer N (HCM), and non-fertilization (Control) were collected to evaluate the relationship between SOC accumulation rate, soil aggregation, microenvironment and microbial community composition using phospholipid fatty acid (PLFA) analysis. Compared to the starting year, SOC content after 20 years under CM, HCM and NPK was significantly (P <0.05) increased by 172 %, 107 % and 56 %, respectively, and by less than 50 % under NP, NK and PK. The mass proportion of macroaggregates was increased by 101–250 % under CM, but was not significantly affected by inorganic fertilizations, except PK. Compost and NPK significantly (P <0.05) reduced the effective diffusion coefficient of oxygen primarily by increasing the proportion of pores
    Original languageEnglish
    Pages (from-to)137-150
    JournalBiology and Fertility of Soils
    Volume51
    Issue number2
    DOIs
    Publication statusPublished - 2014

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