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首页> 外文期刊>Acta Horticulturae >Case study on the trunk's deformity of date palm trees used in the street landscape in Riyadh, Saudi Arabia.
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Case study on the trunk's deformity of date palm trees used in the street landscape in Riyadh, Saudi Arabia.

机译：沙特阿拉伯利雅得街道景观中使用的枣椰子树干变形的案例研究。

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摘要

The presence of deformations has been observed in different areas on the trunks of date palm trees, Phoenix dactylifera L., planted and used in the landscape of sites and streets in Riyadh, Saudi Arabia. This study was conducted on the trunks of date palms, to investigate their cases and identify factors that led to distortion. The study was done on street islands planted with date palm trees in five different districts of Riyadh city. Each island of the street was divided into three parts and twenty palm trees from each part were studied. This study showed that date palm tree trunks used in the landscape of the streets were affected by damage and deformity at different heights on the trunk. The percentage of deformed date palm trees' trunks in four studied districts reached (100%), while it was (70.3%) in the fifth "Al-Khozama" district. In all studied districts, most of the trunk's deformity of date palm trees started from the soil surface, and the length of the deformation area on the trunks varied among these districts. The highest value of the average length of the deformation area was (119.6 cm) while the lowest value was (28.7 cm). The results also showed that the highest value of the percentage of deformation (length of deformed area/length of trunk) on the trunk was (11.46%), while the lowest value was (6.26%). In this study, various of fungous species (Macrophomina phaseolina, Fusarium oxysporum, Fusarium solani) were isolated, purified and defined. These fungi found on the leaf bases in most deformed areas were a result of high humidity leading to rot and decay. This study indicated that the distorted areas on date palm trunks could be due to the growth of lateral roots on the trunks, causing the separation of the leaf bases. The occurrence of this case is because of some irrigation systems used improperly and resulted in water reaching directly to the palm trunks.
机译：在沙特阿拉伯利雅得的地点和街道景观中种植和使用的枣椰树（Phoenix dactylifera L.）树干上的不同区域都观察到了变形。这项研究是在椰枣的树干上进行的，以调查其情况并找出导致畸变的因素。这项研究是在利雅得市五个不同地区的种植有枣椰树的街头岛屿上进行的。街道的每个岛都分为三个部分，每个部分研究了二十棵棕榈树。这项研究表明，在街道景观中使用的枣椰子树干在树干的不同高度受到损坏和变形的影响。在四个研究区域中，变形的枣椰子树树干的百分比达到了（100％），而在第五个“ Al-Khozama”地区则达到了（70.3％）。在所有研究区中，枣椰树树干的大部分变形始于土壤表面，并且这些区域中树干变形区域的长度各不相同。变形区域的平均长度的最大值为（119.6cm），而最小值为（28.7cm）。结果还表明，躯干上的变形百分比的最大值（变形区域的长度/躯干的长度）为（11.46％），而最小值为（6.26％）。在这项研究中，分离，纯化和确定了各种真菌种类（ Macrophomina phaseolina ， Fusarium oxysporum ， solusium solani ）。在大多数变形区域的叶基上发现的这些真菌是高湿度导致腐烂和腐烂的结果。这项研究表明，枣椰子树干上的扭曲区域可能是由于树干上侧根的生长，导致了叶基的分离。发生这种情况的原因是某些灌溉系统使用不当，导致水直接流到棕榈树干。

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