title: [Changes of plant community biomass and soil nutrients during the vegetation succession on abandoned cultivated land in desert steppe region].
abstract: By the method of substituting temporal serial with spatial serial, and taking five abandoned cultivated lands with different ages (1, 4, 9, 12, and 20 years) in desert steppe region as test objects, this paper studied the change characteristics of plant community biomass and soil nutrients during vegetation succession. With the increasing abandoned years, the plant community aboveground biomass on the abandoned lands increased after an initial decrease, whereas the total nitrogen, total phosphorus, organic carbon contents, and carbon density in 0-60 cm soil layer increased first, decreased then, and increased again, with the maximum values of soil total nitrogen and phosphorus contents appeared on the abandoned lands with the ages 4 and 20 years. During vegetation succession, the effects of soil total nitrogen and organic carbon on plant community biomass were greater than those of soil total phosphorus and soil bulk density.
authors.affiliation: Ministry of Education Key Laboratory of Restoration and Reconstruction of Degraded Ecosystem in North-western China/United Center for Ecology Research and Bioresource Exploitation in Western China, Ningxia University, Yinchuan 750021, China. anhui08@163.com
authors.forename: Hui
authors.initials: H
authors.lastname: An
authors.forename: Xin-Guo
authors.initials: XG
authors.lastname: Yang
authors.forename: Bing-Ru
authors.initials: BR
authors.lastname: Liu
authors.forename: Xue-Bin
authors.initials: XB
authors.lastname: Li
authors.forename: Xiu-Zhen
authors.initials: XZ
authors.lastname: He
authors.forename: Nai-Ping
authors.initials: NP
authors.lastname: Song
mesh_terms: D002681:China; D003247:Conservation of Natural Resources; D018556:Crops, Agricultural / Q000254:growth & development*; D003889:Desert Climate; D017753:Ecosystem; D006109:Poaceae / Q000254:growth & development*; D011157:Population Dynamics; D012987:Soil / Q000032:analysis*; D014197:Trees / Q000254:growth & development*
chemical_list: D012987:Soil