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中文摘要：
以福建武夷山不同海拔高度4种植物群落为对象，采用挖掘法获取土壤细根样品，用WinRHIZO根系分析仪分析细根形态，分别测定了不同海拔高度不同土层（0～10、10～25cm）土壤细根现存生物量及各形态指标的变化特征。结果表明：0～10cm土壤活细根生物量、活细根根长密度、活细根表面积密度、活细根体积密度均是常绿阔叶林〈矮林〈针叶林〈高山草甸，各群落间呈现极显著差异（P〈0．01）；不同海拔高度植被，活细根和死细根的生物量、根长密度、细根表面积密度、细根体积密度均指标均是0～10〉10～25cm；4种植被在0～10、10～25cm土层中≤2．0mm径级的活细根、死细根对细根总长度、总表面积的贡献最大；土壤细根生物量及细根的主要形态指标总体趋势是高海拔显著大于低海拔；同时表明了土壤含水率是影响活细根各指标垂直变化的主要因子。
英文摘要：
With four plant communities along an elevation gradient of Wuyi Mountains as test objects, their fine roots in 0-10 cm and 10-25 cm soil layers were sampled to determine the root biomass and its configuration indices. The results showed that in 0-10 cm soil layer, the biomass, length density, surface area density, and volume density of living fine roots were all decreased in the order of evergreen broadleaf forest 〈 dwarf forest 〈 coniferous forest 〈 alpine meadows, with significant differences （ P 〈 0.01 ） among the stands. For each stand, the biomass, length density, surface area density, and volume density of living and dead fine roots were all higher in 0-10 cm than in 10-25 cm soil layer, and the living and dead fine roots with a diameter of ≤2. 0 mm had the greatest contribution to the total fine root length and total fine root surface area. The fine root biomass and its configuration indices decreased significantly along the elevation gradient, and soil moisture content was the main factor affecting the fine root biomass and its configuration.
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