Chen Tongyu, Aishan Tayierjiang, Wang Na, Halik Ümüt, Yao Shiyu
College of Ecology and Environment, Xinjiang University, Urumqi 830046, China.
Ministry of Education Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi 830046, China.
Plants (Basel). 2025 Jan 7;14(2):154. doi: 10.3390/plants14020154.
The characteristics of heartwood and sapwood not only reflect tree growth and site quality but also provide insights into habitat changes. This study examines the natural Oliv. forest in the Arghan section of the lower Tarim River, comparing the heartwood and sapwood characteristics of at different distances from the river, as well as at varying trunk heights and diameters at breast height (DBH). The objective was to examine the correlation between these characteristics and the physicochemical properties of the soil to better understand the ecological response strategies of in arid environments. Results indicated that heartwood radius, sapwood width, sapwood area, and heartwood moisture content decreased with increasing trunk height, following the pattern: 0.3 m > 0.8 m > 1.3 m. In contrast, heartwood density increased as trunk height increased. Most of the heartwood and sapwood indicators increased with larger tree diameters. In the case of with a DBH of less than 45 cm, the difference in moisture content between heartwood and sapwood was not significant ( > 0.05) at heights of 0.3 m and 0.8 m. However, at a height of 1.3 m, the difference was significant ( < 0.05). Soil analysis revealed that factors such as total nitrogen, available potassium, and water content significantly influenced the physical characteristics of heartwood and sapwood across different sites. Redundancy analysis (RDA) further demonstrated that total nitrogen, available phosphorus, and soil moisture were significantly correlated with the physical properties of heartwood and sapwood, further validating the critical role of soil nutrients in shaping the wood characteristics of . These findings highlighted the specific adaptations of in the lower Tarim River to the arid desert environment, reflected in the observed relationships between soil conditions and the physical characteristics of heartwood and sapwood.
心材和边材的特征不仅反映了树木生长和立地质量，还为了解栖息地变化提供了线索。本研究调查了塔里木河下游阿尔干段的天然橄榄树林，比较了距河流不同距离、不同树干高度和胸径（DBH）处的心材和边材特征。目的是研究这些特征与土壤理化性质之间的相关性，以更好地理解橄榄树在干旱环境中的生态响应策略。结果表明，心材半径、边材宽度、边材面积和心材含水量随树干高度增加而降低，规律为：0.3米＞0.8米＞1.3米。相反，心材密度随树干高度增加而增加。大多数心材和边材指标随树径增大而增加。对于胸径小于45厘米的橄榄树，在0.3米和0.8米高度处，心材和边材的含水量差异不显著（P＞0.05）。然而，在1.3米高度处，差异显著（P＜0.05）。土壤分析表明，全氮、速效钾和含水量等因素显著影响了不同样地橄榄树心材和边材的物理特征。冗余分析（RDA）进一步表明，全氮、有效磷和土壤湿度与橄榄树心材和边材的物理性质显著相关，进一步验证了土壤养分在塑造橄榄树木材特征方面的关键作用。这些发现突出了塔里木河下游橄榄树对干旱沙漠环境的特殊适应性，体现在土壤条件与心材和边材物理特征之间的观察关系中。
