title: [Dynamics of Sophora davidii population in a hilly region closed for thirty years in Loess Plateau].
abstract: Taking wild grass ground as the reference, this paper studied the dynamics of Sophora davidii population on the sunny, semi-sunny and semi-shady slopes of hilly region in Loess Plateau after 30 years closed for reforestation, and analyzed the age structure, spatial distribution pattern, life table, and survival curve of the population. The results showed that S. dvidii population in the region belonged to progressive type, with more young and less old individuals. Among the three habits, semi-sunny slope had the highest population density. The survival curve of S. dvidii population was approached to Deevey 11 type. The population pattern was of clustered distribution, with the aggregating intensity increased with age. Water and light were the main environmental factors affecting the recovery and development of S. davidii community. The better recovery of S. davidii population suggested that the measures of closing the land for reforestation were efficient.
authors.affiliation: State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China. zwhckh@163.com
authors.forename: Wenhu
authors.initials: W
authors.lastname: Zhang
authors.forename: Xuehua
authors.initials: X
authors.lastname: Xu
authors.forename: Dengwu
authors.initials: D
authors.lastname: Li
authors.forename: Guobin
authors.initials: G
authors.lastname: Liu
mesh_terms: D002681:China; D003247:Conservation of Natural Resources; D017753:Ecosystem; D011157:Population Dynamics; D012987:Soil / Q000032:analysis*; D029909:Sophora / Q000145:classification / Q000254:growth & development*; D014887:Weather
chemical_list: D012987:Soil