木荚红豆人工林细根生物量季节动态及分布  

The Seasonal Dynamics and Distribution of Fine Root Biomass in Artificial Ormosia xylocarpa Forest

作　　者：陈勇 

机构地区：福建农林大学莘口教学林场,福建三明365002

出　　处：《亚热带资源与环境学报》2006年第1X期63-66,共4页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金资助项目（30170770）

摘　　要：通过对34年生木英红豆人工林细根生物量、季节动态与垂直分布进行为期3年（1999～2001）的研究，结果表明：木荚红豆人工林细根生物量为（3．01±0．47）t／hm^2，其中活细根生物量为（1．70±0．77）t／hm^2，死细根生物量为（1．31±0．52）t／hm^2．活细根和死细根生物量不同季节间差异均达到显著水平（P〈0．05），但年际间差异未达显著水平（P〉0．05）．活细根生物量一般在3月份出现极大值，11月份出现极小值．死细根生物量峰值出现在9～11月份间，最低值一般出现在3月份．活细根和死细根生物量均随土壤深度增加而下降．The study was carried out in three years on an 34 years old artificial Ormosia xylocarpa forest to examine the biomass, the seasonal dynamics and the vertical distribution of the fine root （refers to 〈2 mm in diameter） in the forest. The research indicated that the biomass of the fine root amounted to （3.01 ±0.47） t/hm^2, in which the living fine mot biomass accounted for （1.70 ± 0.77） t/hm^2 and the dead fine root biomass for （1.31 ± 0.52） t/hm^2. The seasonal differences of biomass, both for the living root and the dead root, reached significant level （ P 〈 0.05）, while no significant difference was detected yearly. As far as the living fine root was concerned, there was generally a peak of biomass in March and a lowest point in November. For the dead fine root, the peak occurred during September and November, with a minimum of biomass generally appeared in March. For the vertical distributions of both the living and dead fine root, the biomass decreased with soil depth.

关 键 词：木荚红豆 细根 季节动态 垂直分布 

分 类 号：S718.55[农业科学—林学]