Mechanistic analysis of urban tree-soil interactions: Species-specific water use and desiccation effects on expansive clays

IF 3.9 2区农林科学 Q1 AGRONOMY

Plant and Soil Pub Date : 2024-10-24 DOI:10.1007/s11104-024-07032-8

Xi Sun, Jie Li, Xin Liu, Shengshen Wu, You Gao

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引用次数: 0

Abstract

Aims

This study investigates the complex interactions between urban trees and expansive clay soils, focusing on two prevalent species (Corymbia maculata and Lophostemon confertus) in Melbourne’s urban landscape. Limited field data and understanding of species-specific water use necessitate this research. We aim to quantify the spatiotemporal variability in soil-plant-water interactions within the urban contexts, a crucial factor for informed green infrastructure planning and sustainable ecosystem management in metropolitan areas.

Methods

Comprehensive field measurements were conducted over 12 months, including soil movement, soil water dynamics, tree transpiration, and leaf water potential. Sap flow sensors monitored tree water requirements. Laboratory soil testing determined soil properties and developed soil suction and water content profiles. The intercorrelation between soil water dynamics and tree water use was investigated.

Results

Peak water use for both trees occurred during summer, contributing 32–40% of their total consumption. C. maculata transpired 48.1 kL, exceeding L. confertus by 106%. The trees’ desiccation influence extended horizontally to 0.4–0.5 times the tree height and vertically to 2.3–3.3 m depth. Soil water content explained 31–36% of soil movement variability, with a strong correlation (R² > 0.9) between soil suction and water content within the active root zone.

Conclusions

This study enhances our mechanistic understanding of urban tree-soil interactions, providing valuable insights for sustainable city planning. It emphasizes species-specific considerations in tree selection and placement, especially in areas with expansive soils. The robust field data contributes to refining predictive models of soil-plant-atmosphere interactions in urban landscapes, supporting informed decision-making in urban greening initiatives.

Abstract Image

查看原文本刊更多论文

城市树木与土壤相互作用的机理分析：膨胀性粘土上树种特有的水分利用和干燥效应

研究目的本研究以墨尔本城市景观中的两种常见树种（Corymbia maculata 和 Lophostemon confertus）为重点，调查了城市树木与膨胀性粘土之间复杂的相互作用。由于实地数据和对物种特定用水量的了解有限，因此有必要开展这项研究。我们的目标是量化城市环境中土壤-植物-水相互作用的时空变异性，这是大都市地区绿色基础设施规划和可持续生态系统管理的关键因素。树液流量传感器监测树木的需水量。实验室土壤测试确定了土壤性质，并绘制了土壤吸力和含水量剖面图。结果两种树木的用水高峰期都在夏季，占总耗水量的 32-40%。C.maculata的蒸腾量为48.1 kL，比L. confertus高出106%。树木的干燥影响水平延伸至树高的 0.4-0.5 倍，垂直延伸至 2.3-3.3 米深。土壤含水量解释了 31%-36% 的土壤运动变化，土壤吸力与活动根区的含水量之间存在很强的相关性（R² >0.9）。它强调了在选择和种植树木时要考虑树种的特殊性，尤其是在土壤膨胀的地区。可靠的实地数据有助于完善城市景观中土壤-植物-大气相互作用的预测模型，为城市绿化活动中的知情决策提供支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plant and Soil 农林科学-农艺学

CiteScore

8.20

自引率

8.20%

发文量

543

审稿时长

2.5 months

期刊介绍： Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.