title: [Storages and distributed patterns of soil organic carbon and total nitrogen during the succession of artificial sand-binding vegetation in arid desert ecosystem].
abstract: Soil carbon pool acts as the largest one of carbon pools in the terrestrial ecosystem. The storages and distributed patterns of soil organic carbon (SOC) and total nitrogen (TN) evaluated accurately are helpful to predict the feedback between the terrestrial ecosystem and climate changes. Based on the data about bulk density, content of SOC and TN at 0-100 cm soil profile, the density of SOC and TN at the temporal (chronosequence of artificial vegetation) and spatial (vertical) distributed patterns have been estimated. The results indicated that storages of SOC and TN at 0-100 cm depth increased with the chronosequence of artificial vegetation. The storages of SOC and TN showed the same tendency with the succession time of artificial vegetation. Storages of SOC and TN significantly increased at the early stage of banding sand by artificially vegetation (< 16 a), then piled up at the mid-stage (16-25 a), and markedly increased at the late stage (> 25 a). The variation of storages mainly occurred in the 0-20 cm depth. The storages decreased with the soil vertical depth. At the early stage of banding sand, increase in storage included every depth (0-100 cm). Whereas, at the later stage, increase in storage at 0-20 cm depth was main, and increase in the 20-100 cm was inconspicuous. The accumulation of storage at the shallow soil depth was more notability with the succession of artificial vegetation. The distributed pattern of storage in SOC and TN has been confirmed in arid desert regions below 200 mm annual precipitation. This was beneficial to understand the carbon cycle and to predict the feedback relationship between desert ecosystem and climate changes.
authors.affiliation: Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China. jiaxiaohonggs@163.com
authors.forename: Xiao-Hong
authors.initials: XH
authors.lastname: Jia
authors.forename: Xin-Rong
authors.initials: XR
authors.lastname: Li
authors.forename: Yu-Yan
authors.initials: YY
authors.lastname: Zhou
authors.forename: Yuan-Shou
authors.initials: YS
authors.lastname: Li
mesh_terms: D002244:Carbon / Q000032:analysis*; D057486:Carbon Cycle; D002681:China; D003889:Desert Climate; D017753:Ecosystem; D009584:Nitrogen / Q000032:analysis*; D009930:Organic Chemicals / Q000032:analysis; D063245:Plant Development; D012822:Silicon Dioxide; D012987:Soil / Q000032:analysis*
chemical_list: D009930:Organic Chemicals; D012987:Soil; D002244:Carbon; D012822:Silicon Dioxide; D009584:Nitrogen