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Synergistic relationships between the age of soil organic matter, Fe speciation, and aggregate stability in an arable Luvisol by Nina Siebers; Eva Voggenreiter; Prachi Joshi; Janet Rethemeyer; Liming Wang is a Agricultural and Biological Sciences article available to read on EtoBox.
What is Synergistic relationships between the age of soil organic matter, Fe speciation, and aggregate stability in an arable Luvisol about?
## Abstract ## Background Knowledge of soil aggregate formation and stability is essential, as this is important for maintaining soil functions. ## Aims This study aimed to investigate the influence of organic matter (OM), the content of pedogenic iron (Fe) (oxyhydr)oxides, and aggregate size on the stability of aggregates in arable soil. ## Methods To this end, the Ap and Bt horizons of a Luvisol were sampled after 14 years of bare fallow, and the results were compared with a control field that had been permanently cropped. ## Results In the Ap horizon, bare fallow decreased the median diameter of the 53–250 μm size fraction by 26%. Simultaneously, the mass of the 20–53 μm size fraction increased by 65%, indicating reduced stability—particularly of larger soil microaggregates—due to the lack of input of fresh OM. The range of^14^carbon (^14^C) fraction of modern C (F^14^C) under bare fallow was between 0.50 and 0.90, and thus lower than the cropped site (F^14^C between 0.75 and 1.01), which is particularly pronounced in the smallest size fraction, indicating the presence of older C. This higher stability and the reduced C turnover in <20 μm aggregates is probably also due to havin
Who reads Synergistic relationships between the age of soil organic matter, Fe speciation, and aggregate stability in an arable Luvisol?
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- Author
- Nina Siebers; Eva Voggenreiter; Prachi Joshi; Janet Rethemeyer; Liming Wang
- Publisher
- Wiley
- Published
- 2023
- Language
- EN
- Field
- Agricultural and Biological Sciences (Life Sciences)