吉林蛟河天然阔叶红松林下5种灌木生物量估算模型

以吉林蛟河地区天然红松阔叶林林下常见的5种灌木为研究对象,分乔木型灌木﹝地面分枝少、主干明显,包括卫矛(Euonymus alatus)、东北鼠李(Rhamnus yoshinoi)﹞和典型灌木﹝地面分枝多、主干不明显,包括长白茶藨(Ribes komarovii)、暖木条荚蒾(Viburnum burejaeticum)、鸡树条荚蒾(Viburnum sargentii)﹞,以易测因子通过回归分析构建了单种各器官和全株(丛)生物量模型。结果表明:最优生物量模型均为幂函数模型或一次线性模型,除长白茶藨的丛当年枝生物量模型和丛多年枝生物量模型在0.01水平上显著以及暖木条荚蒾的当年枝生物量模型在0.05水平上显著外,其余模型均在0.001水平上显著。以植株个体为单位的生物量模型中,除东北鼠李叶生物量和枝生物量与植灌体积Vc相关性最好外,其余各器官生物量和全株生物量均与地径D或地径平方与树高的乘积D2H相关性最好。典型灌木的叶、当年枝、多年枝、枝、茎和地上生物量以分支个体为单位构建的生物量模型要好于以丛为单位构建的生物量模型,但地下生物量和全丛生物量模型正好相反,因此,以丛为单位构建地下生物量和全丛生物量模型为典型灌木的生物量估算提供了简便可行的方法。

Biomass estimation model of shrub in broad leaved korean pine (Pinus koraiensis) mixed forest in Jiaohe, Jilin province

With 10 common species of understory shrub of Broad Leaved Korean Pine (Pinus koraiensis) Mixed Forest in Jiaohe as test objects, according to the growth forms,biomass models were constructed for different organs and the whole plant of tree-like shrub (single trunked: Euonymus alatus and Rhamnus yoshinoi) and typical shrub (multi-stemmed or low branching: Ribes komarovii, Viburnum burejaeticum and V. sargentii). The results indicated that the optimal biomass models were linear models or power function models, the significance level of each model was 0.001 except for the new branche bimass model of Ribes komarovii with P value<0.01, the new branch bimass model of Viburnum burejaeticum with P<0.05. For the biomass model of individual plant, there was significant correlation between biomass and ground diameter(D) or the square of ground diameter multiplied by the tree height (D2H) except for the leaf biomass and branch biomass of Rhamnus yoshinoi which was the best correlation with plant volume (Vc). For the typical shrub, leaf biomass, new branch biomass, old branch biomass, branch biomass, stem biomass and aboveground biomass model based on each branch individuals were better than the biomass model besed on total bush, otherwise, the belowground biomass model and totall bush biomass model were just the opposite, thus, it is convenient to construct belowground biomass model and total biomass model with Dc or Dc2Hc as independent variable for estimating belowground biomass and total biomass of typical shrub.