title: [Dynamic changes of surface soil organic carbon and light-fraction organic carbon after mobile dune afforestation with Mongolian pine in Horqin Sandy Land].
abstract: This paper studied the dynamic changes of surface (0-15 cm) soil organic carbon (SOC) and light-fraction organic carbon (LFOC) in 25- and 35-year-old sand-fixing Mongolian pine (Pinus sylvestris var. mongolica) plantations in Horqin Sandy Land, with a mobile dune as a comparison site. After the afforestation on mobile dune, the content of coarse sand in soil decreased, while that of fine sand and clay-silt increased significantly. The SOC and LFOC contents also increased significantly, but tended to decrease with increasing soil depth. Afforestation increased the storages of SOC and LFOC in surface soil, and the increment increased with plantation age. In the two plantations, the increment of surface soil LFOC storage was much higher than that of SOC storage, suggesting that mobile dune afforestation had a larger effect on surface soil LFOC than on SOC.
authors.affiliation: Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China. shenwem24@163.com
authors.forename: Wen
authors.initials: W
authors.lastname: Shang
authors.forename: Yu-qiang
authors.initials: YQ
authors.lastname: Li
authors.forename: Shao-kun
authors.initials: SK
authors.lastname: Wang
authors.forename: Jing
authors.initials: J
authors.lastname: Feng
authors.forename: Na
authors.initials: N
authors.lastname: Su
mesh_terms: D002244:Carbon / Q000032:analysis*; D002681:China; D003247:Conservation of Natural Resources / Q000379:methods*; D003889:Desert Climate; D017753:Ecosystem; D009930:Organic Chemicals / Q000032:analysis; D028223:Pinus / Q000254:growth & development*; D012987:Soil / Q000032:analysis*
chemical_list: D009930:Organic Chemicals; D012987:Soil; D002244:Carbon