长白山落叶松林下笃斯越桔群落生物量的空间分布

以长白山区落叶松林下笃斯越桔群落为研究对象,调查其群落的地上、地下各部分的生物量及其空间分布规律。结果表明:地上部枝条生物量主要分布在50cm高度以下,基径3～5mm粗枝的生物量在地上部分各级别中所占比重最大。笃斯越桔地下部生物量较大,占总生物量的75.2%～92.6%;地下部生物量主要集中在死苔藓层内,占总根量的66.3%～85.0%,而其中<1mm细根所占比重最大,为该层总根量的42.6%～82.7%。在泥炭层内笃斯越桔根系占总根量的12.3～29.7%,比重较小。笃斯越桔的根系生物量占所有植物根系生物量的8.8%～60.7%,笃斯越桔以细根为主。本研究结果为笃斯越桔资源的合理开发与保护利用以及生态系统碳汇功能评估等提供了基础。

Spatial distribution of the biomass of Vaccinium uliginosum community under Larix olgensis forests in Changbai Mountains, Northeast China

An investigation was conducted on the below-and above-ground biomass and its spatial distribution of Vaccinium uliginosum community under Larix olgensis forests in Changbai Mountains.The above-ground biomass of the V.uliginosum community was mainly distributed below the height of 50 cm,and the biomass of the branches with a diameter of 3-5 mm occupied the largest portion.The below-ground biomass accounted for 75.2%-92.6% of the total,and was mainly(66.3%-85.0%) distributed in dead moss layer where the biomass of fine roots(<1 mm) accounted for 42.6%-82.7% of the total.In peat layer,the root biomass accounted for 12.3%-29.7% of the total.The root biomass of V.uliginosum accounted for 8.8%-60.7% of the total root biomass of all plant species,and the fine root biomass of V.uliginosum occupied a great portion.This study provided basis for the rational protection and utilization of V.uliginosum resources and the evaluation of the carbon sequestration of the ecosystem.