Kusiak Władysław, Majka Jerzy, Zborowska Magdalena, Ratajczak Izabela
Department of Forest Engineering, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 71C, 60-625 Poznań, Poland.
Department of Wood Science and Thermal Techniques, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 38/42, 60-637 Poznań, Poland.
Materials (Basel). 2022 Jun 6;15(11):4033. doi: 10.3390/ma15114033.
Mill. is a favourite tree used in urban spaces. For this reason, it is important to know its sensitivity to environmental stress, which is particularly burdensome for vegetation in urban spaces. The aim of the study was to investigate the properties necessary to control the growth of these trees and their subsequent use, i.e., chemical properties (percentage contents of cellulose, holocellulose, lignin, pentosans and substances soluble in NaOH and EtOH) as well as the chemical elements (K, Na, Mg, Ca and Fe, Zn, Cu, Pb, Cd, B, Ni, Cr, Al, As and Hg) and selected hygroscopic properties (hysteresis and sorption isotherms). Trees of Mill. growing in environments exposed to environmental stress of varying severity were examined. Regardless of the growth conditions, in terms of its chemical composition, bark differs significantly from wood, showing twice the contents of soluble substances in NaOH and lignin and half the content of polysaccharides. Growth conditions clearly affect the range of selected chemical components in bark, e.g., substances soluble in ethanol, cellulose, or lignin. The main inorganic elements in bark and wood are Na, K, Ca, Mg and Zn. In bark, a relationship was found between the content of most chemical elements and differing environmental growth conditions. It was shown that environmental stress influenced the hygroscopic properties of wood and bark, which are a consequence of the percentage of chemical components.
Mill.是城市空间中常用的一种受欢迎的树木。因此，了解其对环境胁迫的敏感性很重要，这对城市空间中的植被来说尤其具有负担性。该研究的目的是调查控制这些树木生长及其后续用途所需的特性，即化学特性（纤维素、全纤维素、木质素、戊聚糖以及可溶于氢氧化钠和乙醇的物质的百分比含量）以及化学元素（钾、钠、镁、钙和铁、锌、铜、铅、镉、硼、镍、铬、铝、砷和汞）和选定的吸湿特性（滞后现象和吸附等温线）。对生长在不同严重程度环境胁迫下的Mill.树木进行了研究。无论生长条件如何，就其化学成分而言，树皮与木材有显著差异，树皮中可溶于氢氧化钠的物质和木质素的含量是木材的两倍，而多糖的含量是木材的一半。生长条件明显影响树皮中选定化学成分的范围，例如可溶于乙醇的物质、纤维素或木质素。树皮和木材中的主要无机元素是钠、钾、钙、镁和锌。在树皮中，发现大多数化学元素的含量与不同的环境生长条件之间存在关系。结果表明，环境胁迫影响了木材和树皮的吸湿特性，而吸湿特性是化学成分百分比的结果。
