title: [Fine root production and turnover in Pinus massoniana plantation in Three Gorges Reservoir area of China].
abstract: By the methods of sequential soil cores and buried bags, an investigation was conducted to study the seasonal dynamics of fine roots in a 20-year-old Pinus massoniana plantation in Three Gorges Reservoir Area from March to December 2011, with the annual production and turnover rate of the fine roots calculated. In the plantation, the annual mean biomass of <2 mm fine roots was 146.98 g x m(-2) x a(-1), in which, the living root biomass (102.92 g x m(-2) x a(-1)) was far greater than that of the dead root biomass (44.06 g x m(-2) x a(-1)). Among the fine roots with different sizes, <1 mm fine roots had an obvious seasonal dynamics in their biomass, showing a unimodal curve in the sampling period. The annual production and turnover rate of <2 mm fine roots were 104. 12 g x m(-2) x 1(-1) and 1.05 a(-1), respectively, in which, the annual production of <1 mm and 1-2 mm fine roots was 58.35 and 45.77 g x m(-2) x a(-1), and the turnover rate was 1.41 and 0.69 a(-1), respectively.
authors.affiliation: State Forestry Administration Key Laboratory of Forest Ecology and Environment, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China. loverain.88@163.com
authors.forename: Rui-Li
authors.initials: RL
authors.lastname: Wang
authors.forename: Rui-Mei
authors.initials: RM
authors.lastname: Cheng
authors.forename: Wen-Fa
authors.initials: WF
authors.lastname: Xiao
authors.forename: Xiao-Hui
authors.initials: XH
authors.lastname: Feng
authors.forename: Ze-Bin
authors.initials: ZB
authors.lastname: Liu
authors.forename: Xiao-Gai
authors.initials: XG
authors.lastname: Ge
authors.forename: Xiao-Rong
authors.initials: XR
authors.lastname: Wang
authors.forename: Wei-Yin
authors.initials: WY
authors.lastname: Zhang
mesh_terms: D018533:Biomass; D002681:China; D017753:Ecosystem; D028223:Pinus / Q000033:anatomy & histology / Q000254:growth & development* / Q000378:metabolism; D018517:Plant Roots / Q000033:anatomy & histology / Q000254:growth & development* / Q000378:metabolism; D045483:Rivers; D014881:Water Supply