Dynamics of soil aggregate-associated organic carbon along an afforestation chronosequence

摘要: The objectives of this study were to determine the dynamics aggregate-associated organic carbon (OC) along an afforestation chronosequence on abandoned farmland China, and examine contributions changes in OC total soil OC. We investigated associated with aggregates chronosequence. Water-stable isolated, concentrations measured. Averaged across entire chronosequence, led 116, 128 108 % average increases macroaggregates, microaggregates <0.053 mm size class, respectively, top 20 cm soil. stocks macroaggregates increased by averages 651 473 % at 0–10 10–20 cm depths, mostly within first 24 years. decreased during 35 years then 48–200 years afforestation. accounted for 83 100 % increase soils respectively. Our results indicated that accumulation after was mainly due macroaggregates.