2026-10-07T07:06:36Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33954604 2026-09-23T13:28:48Z category_23863 category_23947 item_type_3 month_year_09_2026

<b>Fertilization drives divergent responses of soil aggregation, operational Fe–Al–Mn pools and potential carbon turnover in an acidic tea soil</b> Huan Li (11826209) Agricultural management of nutrients Fertilisers (incl. application) soil organic carbon soil aggregation operationally extractable Fe and Al carbon mineralization organo-mineral interactions aggregate-size dependence <p dir="ltr">Fertilization can alter soil aggregation and operationally extractable metal pools without producing equivalent changes in carbon turnover. We tested how six fertilizer regimes affected wet-sieved aggregate structure, operational Fe, Al and Mn pools, bulk X-ray diffraction profiles and 30-day, aggregate-resolved potential carbon mineralization in an acidic tea soil. The inferential archive comprised three spatially distinct, independent field replicate plots per regime; synchrotron-radiation FTIR maps provided descriptive microscale context. Operational Fe–Al–Mn pools showed the strongest multivariate treatment response (R²=0.832, q=0.00025), whereas bulk XRD profiles did not differ after correction (q=0.236). No corrected evidence supported a shared treatment-response configuration across aggregation, operational-mineral, mineralization and XRD domains. After treatment centring, operational-mineral pools covaried with fraction-specific potential mineralization (RV=0.638, q=0.0081), provisionally localizing to 0.25–2 mm aggregates (RV=0.498, q=0.0453). Within this fraction, bulk-soil Feₒ was negatively associated with mineralization (ρ=−0.715; hypothesis-guided 40-edge q=0.0223), and the association remained similar under treatment-blind imputation (ρ=−0.723). These findings are consistent with, but do not confirm, aggregate-size-dependent mineral–turnover coupling. Aggregate stability, Feₒ and bulk mineralogy should not be treated as interchangeable proxies for persistent soil-carbon stabilization.</p> 2026-09-23T13:28:48Z Dataset Dataset 10.6084/m9.figshare.33954604.v2 https://figshare.com/articles/dataset/_b_Fertilization_drives_divergent_responses_of_soil_aggregation_operational_Fe_Al_Mn_pools_and_potential_carbon_turnover_in_an_acidic_tea_soil_b_/33954604 CC BY 4.0