caa a22 4500 60621920X CHVBK 20210128101117.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s11104-015-2415-7 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2415-7 Dynamics of soil aggregate-associated organic carbon along an afforestation chronosequence [Elektronische Daten] [Liping Qiu, Xiaorong Wei, Jianlun Gao, Xingchang Zhang] Aims: The objectives of this study were to determine the dynamics of aggregate-associated organic carbon (OC) along an afforestation chronosequence on abandoned farmland of China, and to examine the contributions of changes in aggregate-associated OC to changes in total soil OC. Methods: We investigated the dynamics of OC associated with aggregates along an afforestation chronosequence. Water-stable aggregates were isolated, and the OC concentrations in total soil and the aggregates were measured. Results: Averaged across the entire chronosequence, afforestation led to 116, 128 and 108% average increases in OC concentrations in macroaggregates, microaggregates and the <0.053mm size class, respectively, in the top 20cm of soil. The OC stocks in macroaggregates increased by averages of 651 and 473% at 0-10 and 10-20cm depths, respectively, mostly within the first 24years. The OC stocks in microaggregates decreased during the first 35years and then increased during 48-200years of afforestation. Averaged across the entire chronosequence, the increases in OC stocks in macroaggregates accounted for 83 and 100% of the total increase in OC stocks in soils at 0-10 and 10-20cm depths, respectively. Conclusion: Our results indicated that the accumulation of OC in soils after afforestation on abandoned farmland was mainly due to the accumulation of OC in macroaggregates. Springer International Publishing Switzerland, 2015 Abandoned farmland nationallicence Afforestation age nationallicence Chinese pine nationallicence OC accumulation nationallicence OC turnover nationallicence Soil aggregate nationallicence Soil depth nationallicence Qiu Liping State Key Laboratory of Soil Erosion and Dryland Farming in the Loess Plateau, Northwest A&F University, Xinong Road, #26, 712100, Yangling, Shaanxi Province, China aut Wei Xiaorong State Key Laboratory of Soil Erosion and Dryland Farming in the Loess Plateau, Northwest A&F University, Xinong Road, #26, 712100, Yangling, Shaanxi Province, China aut Gao Jianlun Hengshan Meteorological Office of Shaanxi Province, 719100, Hengshan, Shaanxi Province, China aut Zhang Xingchang State Key Laboratory of Soil Erosion and Dryland Farming in the Loess Plateau, Northwest A&F University, Xinong Road, #26, 712100, Yangling, Shaanxi Province, China aut Plant and Soil Springer International Publishing 391/1-2(2015-06-01), 237-251 0032-079X 391:1-2<237 2015 391 11104 https://doi.org/10.1007/s11104-015-2415-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2415-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Qiu Liping State Key Laboratory of Soil Erosion and Dryland Farming in the Loess Plateau, Northwest A&F University, Xinong Road, #26, 712100, Yangling, Shaanxi Province, China aut NATIONALLICENCE 700 1- Wei Xiaorong State Key Laboratory of Soil Erosion and Dryland Farming in the Loess Plateau, Northwest A&F University, Xinong Road, #26, 712100, Yangling, Shaanxi Province, China aut NATIONALLICENCE 700 1- Gao Jianlun Hengshan Meteorological Office of Shaanxi Province, 719100, Hengshan, Shaanxi Province, China aut NATIONALLICENCE 700 1- Zhang Xingchang State Key Laboratory of Soil Erosion and Dryland Farming in the Loess Plateau, Northwest A&F University, Xinong Road, #26, 712100, Yangling, Shaanxi Province, China aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 391/1-2(2015-06-01), 237-251 0032-079X 391:1-2<237 2015 391 11104