三峡库区马尾松人工林细根生产和周转

应用生态学报 ›› 2012, Vol. 23 ›› Issue (09): 2346-2352.

三峡库区马尾松人工林细根生产和周转

王瑞丽¹,程瑞梅^1**,肖文发¹,封晓辉^1,2,刘泽彬¹,葛晓改¹,王晓荣^1,3,张炜银¹

(¹中国林业科学研究院森林生态环境与保护研究所国家林业局森林生态环境重点实验室, 北京 100091； ²中国科学院遗传与发育生物学研究所农业资源研究中心, 石家庄 050021； ³湖北省林业科学研究院, 武汉 430079)

出版日期:2012-09-18 发布日期:2012-09-18

Fine root production and turnover in Pinus massoniana plantation in Three Gorges Reservoir Area of China.

WANG Rui-li¹, CHENG Rui-mei¹, XIAO Wen-fa¹, FENG Xiao-hui^1,2, LIU Ze-bin¹, GE Xiao-gai¹, WANG Xiao-rong^1,3, ZHANG Wei-yin¹

(¹State Forestry Administration Key Laboratory of Forest Ecology and Environment, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China; ²Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050021, China; ³Hubei Forestry Academy, Wuhan 430079, China)

Online:2012-09-18 Published:2012-09-18

摘要/Abstract

摘要： 2011年3—12月,采用连续根钻法和分解袋法,研究了三峡库区20年生马尾松人工林细根的季节动态,计算了细根的年生产量和周转率.结果表明: 三峡库区马尾松人工林细根(<2 mm)年均生物量为146.98 g·m^-2,其中活细根年均生物量(102.92 g·m^-2)远大于死细根生物量(44.06 g·m^-2)；不同径级细根现存量的时间动态不同,<1 mm根系季节动态较为明显,整体呈单峰型曲线；马尾松人工林细根(<2 mm)的年生产量为104.12 g·m^-2·a^-1,年周转率为1.05 a^-1,其中<1 mm和1~2 mm的年生产量分别为58.35和45.77 g·m^-2·a^-1,周转率为1.41和0.69 a^-1.

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·m^-2·a^-1, in which, the living root biomass (102.92 g·m^-2·a^-1) was far greater than that of the dead root biomass (44.06 g·m^-2·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·m^-2·a^-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·m^-2·a^-1, and the turnover rate was 1.41 and 0.69 a^-1, respectively. 

王瑞丽1,程瑞梅1**,肖文发1,封晓辉1,2,刘泽彬1,葛晓改1,王晓荣1,3,张炜银1. 三峡库区马尾松人工林细根生产和周转[J]. 应用生态学报, 2012, 23(09): 2346-2352.

WANG Rui-li1, CHENG Rui-mei1, XIAO Wen-fa1, FENG Xiao-hui1,2, LIU Ze-bin1, GE Xiao-gai1, WANG Xiao-rong1,3, ZHANG Wei-yin1. Fine root production and turnover in Pinus massoniana plantation in Three Gorges Reservoir Area of China.[J]. Chinese Journal of Applied Ecology, 2012, 23(09): 2346-2352.