Faculty of Forestry, Soil Science and Ecology Department, Istanbul University-Cerrahpaşa, Bahcekoy, Sariyer, Istanbul, Turkey.
Faculty of Forestry, Forest Yield and Biometry Department, Istanbul University-Cerrahpaşa, Bahcekoy, Sariyer, Istanbul, Turkey.
Environ Monit Assess. 2020 May 13;192(6):363. doi: 10.1007/s10661-020-08263-9.
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 (DH) (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.
本研究测定并建模了东安纳托利亚（土耳其凡城）灰杨（Populus × canescens）分布区单株树木各组成部分（叶片、树枝、树冠、树皮、树干和地上部分总生物量）的生物量、碳和氮储量。生物量、碳（C）和氮（N）储量不是在林分水平上估计的，而是基于单株树木。基于胸径（DBH）和树总高（H）开发了回归模型，以估计 28 株灰杨不同树木组成部分的生物量、碳（C）储量和氮（N）储量。仅基于 DBH（模型 1）和 DBH 与高度（DH）组合（模型 2）建立了两个幂函数形式的主要回归模型。除了叶片组成部分的回归模型外，用于估计树木组成部分生物量和 C 和 N 储量的所有回归模型均具有统计学意义（p < 0.001）。树皮、叶片、树枝和树干的地上部分总生物量分配比例分别为 0.7、9、17 和 73%。树木组成部分的平均 C 浓度范围为 48%（叶片）至 50%（树皮、树枝和树干），而 N 浓度范围为 0.35%（树干）至 1.32%（叶片）。与人工种植的杨树相比，灰杨叶片具有较高的生物量和较低的氮浓度，这可能与自然立地条件、土壤氮含量低和/或单株树木生长特性有关。
