The biomass, carbon and nitrogen storage in the single tree components (foliage, branch, crown, bark, stem and total aboveground) of the grey poplar (Populus × canescens) in its distribution in Eastern Anatolia (Van, Turkey) were determined and modelled. The biomass, carbon and nitrogen storages were not estimated at a stand level but were based on single trees. Regression models based on the tree diameter at breast height (DBH) and total tree height (H) were developed to estimate the biomass, carbon (C) storage and nitrogen (N) storage of the different tree components of a total of 28 grey poplar trees. The two main regression models in the power function were developed based only on the DBH (Model 1) and the combination of the DBH and height (D²H) (Model 2). All regression models, except for those of the foliage components, developed to estimate the biomass and C and N storages of the tree components were found to be statistically significant (p < 0.001). The partitioning of the total aboveground biomass in the bark, foliage, branches and stems was 0.7, 9, 17 and 73%, respectively. The average C concentrations of the tree components ranged from 48 (foliage) to 50% (bark, branch and stem), while the N concentrations ranged from 0.35 (stem) to 1.32% (foliage). Higher biomass and lower nitrogen concentrations of foliage compared with cultivated poplars were likely related to the natural site conditions, low soil nitrogen and/or characteristics of single tree growth.

中文翻译：

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土耳其范城一个未经耕种的生境中灰杨（Populus×canescens）单树成分中的生物量，碳和氮。

确定并模拟了在安那托利亚东部（范，土耳其）分布的灰杨（Populus × canescens）的白杨（树，树枝，树冠，树皮，茎和总地上）的单树成分（叶子，树枝，树冠，树皮，茎和总地上部分）的生物量，碳和氮存储量。生物量，碳和氮的储存量不是以林分水平估算的，而是基于单棵树。建立了基于胸高（DBH）和总树高（H）的树径的回归模型，以估算28种灰杨的不同树种的生物量，碳（C）储存和氮（N）储存树木。幂函数中的两个主要回归模型仅基于DBH（模型1）以及DBH和高度（D ²H）（模型2）。除树叶成分的所有回归模型外，所有用于估计生物量以及树木成分的C和N储量的回归模型均具有统计学意义（p  <0.001）。树皮，树叶，树枝和茎中地上总生物量的分配分别为0.7％，9％，17％和73％。树木成分的平均C浓度范围为48（叶）至50％（树皮，树枝和茎），而N浓度范围为0.35（茎）至1.32％（叶）。与栽培杨树相比，较高的生物量和较低的氮素浓度可能与自然立地条件，土壤低氮和/或单棵树的生长特征有关。