caa a22 4500 606218688 CHVBK 20210128101114.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s11104-015-2435-3 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2435-3 Effects of land-use change on soil organic carbon and nitrogen in density fractions and soil δ13C and δ15N in semiarid grasslands [Elektronische Daten] [Liping Qiu, Xiaorong Wei, Tiane Ma, Yanchun Wei, Robert Horton, Xingchang Zhang, Jimin Cheng] Aims: The objectives of this study were to determine the response of soil organic carbon (SOC) and nitrogen (N) in different density fractions and the response of δ13C and δ15N signatures of soil to land-use change in a semiarid grassland. Methods: We measured soil δ13C and δ15N and the concentrations of SOC and N in whole soil and in the light and heavy fractions in adjacent tracts of native grassland, cropland, and shrubland in a semiarid region of China. The cropland and shrubland were established on existing grassland 27years ago. Results: The conversion of grassland to cropland or to shrubland significantly decreased SOC and N concentrations and stocks in both whole soil and density fractions in the 0-80cm soil layer. The decreases in SOC and N stocks associated with the heavy fraction accounted for >90% of the total decrease in the 0-80cm soil layer after grassland cultivation or afforestation. The conversion of grassland to cropland or to shrubland significantly enriched soil δ13C but depleted δ15N. Conclusions: Our results suggested that the losses of SOC and N in whole soil after land-use changes in this semiarid grassland were primarily due to losses of SOC and N associated with the heavy fraction. Springer International Publishing Switzerland, 2015 Cropland nationallicence Isotopic signatures nationallicence Light and heavy fractions nationallicence Shrubland nationallicence Soil nitrogen nationallicence Soil organic carbon 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 Ma Tiane 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 Yanchun 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 Horton Robert Department of Agronomy, Iowa State University, 50011, Ames, USA 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 Cheng Jimin 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 390/1-2(2015-05-01), 419-430 0032-079X 390:1-2<419 2015 390 11104 https://doi.org/10.1007/s11104-015-2435-3 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/s11104-015-2435-3 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- Ma Tiane 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 Yanchun 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- Horton Robert Department of Agronomy, Iowa State University, 50011, Ames, USA 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 700 1- Cheng Jimin 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 390/1-2(2015-05-01), 419-430 0032-079X 390:1-2<419 2015 390 11104