滇中高原桤木人工林群落特征及生物量分析

对云南省会泽县桤木Alnus cremastogyne人工林的调查分析结果表明,桤木人工林生长迅速,根系发达,林下灌草恢复快,生物多样性高,具有很好的土壤改良与水源涵养功能。桤木各部位的生物量依次为干>根>枝>皮>叶,其根系主要分布在0~40 cm的表层土壤中,占根系总量的96.14%;从桤木林分各层的生物量来看,乔木层生物量最大,占总生物量的84.93%,其次为枯落物层和草本层,灌木层较少。在分析桤木生物量基础上建立了桤木各器官生物量回归模型。表5参16

Characteristics of Alnus cremastogyne plantation community and its biomass in central Yunnan Plateau

A study of the Alnus cremastogyne plantation showed that it was characterized by fast-growing,flourishing root system,quick undergrowth restoration,higher biodiversity,soil improving and water holding capacity.The biomass of tree organs were in order trunk> root> branch> bark>leaf.The roots in the soil layer of 0-40cm accounted for 96.14% of the total roots.The biomass in the arbor layer was the largest,accounting for 84.93% of the total biomass of the plantation.The biomass of leaf litter layer,herbage layer and shrub layer were less than the arbor layer.Finally regression models of the biomass of different Alnus cremastogyne organs were established to provide the reference for the management of the Alnus cremastogyne plantation.