ABSTRACT A study was conducted in South Omo Zone, Ethiopia with the aim of assessing the population status of the frankincense tree Boswellia neglecta and investigating its resin essential oil chemical composition. The status of populations of B. neglecta was assessed by examining the density, abundance, frequency, dominance, importance value index, and population structure. Resin sample was analyzed for the physicochemical properties. The composition of the essential oil was analyzed with Gas Chromatography-Mass Spectrometry. The high values of density, abundance, frequency, dominance, and importance value index for B. neglecta showed the potential of the tree for bulk resin collection. Boswellia neglecta had a bell-shaped diameter distribution indicating a hampered regeneration. The B. neglecta resin had a moisture content of 2.68%, ash content of 0.99%, pH of 5.7, and oil yield of 5.92%. The resin possessed good quality as compared to resins in other reports. The essential oil was optically active (−31.6° at 23.2°C). The essential oil contained several compounds, but 71.1% of the composition were formed mainly from methyl oleate, methyl linoleate, methyl palmitate, which have not been reported from B. neglecta. Sustainable management must be enacted since the agro-pastoralist mode of life hinders regeneration of the species and its resin resources.

中文翻译：

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生长在埃塞俄比亚西南部南奥莫的乳香乳香（Burseraceae）的种群状况和树脂质量

摘要 在埃塞俄比亚南奥莫地区进行了一项研究，目的是评估乳香树 Boswellia ignorea 的种群状况并调查其树脂精油化学成分。通过检查密度、丰度、频率、优势度、重要性值指数和种群结构来评估 B. ignorea 种群的状况。分析树脂样品的理化性质。用气相色谱-质谱法分析精油的成分。B. ignorea 的密度、丰度、频率、优势和重要性价值指数的高值显示了该树用于散装树脂收集的潜力。乳香的直径分布呈钟形，表明再生受阻。B. ignorea 树脂的水分含量为 2.68%，灰分0.99%，pH 5.7，出油率5.92%。与其他报告中的树脂相比，该树脂具有良好的质量。精油具有旋光​​性（-31.6°，23.2°C）。精油中含有多种化合物，但 71.1% 的成分主要由油酸甲酯、亚油酸甲酯、棕榈酸甲酯形成，这些成分尚未从 B. ignorea 中报道。由于农牧民生活方式阻碍了物种及其树脂资源的再生，因此必须制定可持续管理。尚未从 B. ignorea 报告。由于农牧民生活方式阻碍了物种及其树脂资源的再生，因此必须制定可持续管理。尚未从 B. ignorea 报告。由于农牧民生活方式阻碍了物种及其树脂资源的再生，因此必须制定可持续管理。