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城市森林地表土壤特性的空间变化:朝着具有代表性和稳健的采样设计

Nadina Galle^1,2, William Brinton³, Robin Vos⁴

¹Senseable City Laboratory, Massachusetts Institute of Technology, MIT 9-216, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.

Open research Europe

|October 23, 2023

概括

城市土壤采样需要谨慎的设计,因为高度的变化. 电导率 (EC) 可以指导城市树木基底土壤呼吸 (BSR) 的采样,降低成本.

科学领域:

城市土壤科学城市土壤科学
环境科学环境科学
森林生态森林生态

背景情况:

土壤的空间变化对于代表性地表土壤采样至关重要,特别是在具有复杂干扰的城市森林中.
现有的农业采样设计对于城市土壤来说是不够的,这些土壤表现出显著的水平,垂直和人为变化.
了解城市土壤特性对于管理城市森林健康和生态系统服务至关重要.

研究的目的:

评估城市树木 (Acer rubrum) 下的地表土质的空间变异性.
为基底土壤呼吸 (BSR) 定义一个统计学上可靠的采样设计.
评估电导率 (EC) 和散装密度 (BD) 的实用性,作为空间可变性的指标.

主要方法:

在马萨诸塞州剑桥市有13个公园和街头树木的采样地点被选中.
测量了包括基底土壤呼吸 (BSR),电导率 (EC) 和散装密度 (BD) 在内的表层土壤特性.
使用统计分析来确定可靠表征BSR所需的样本数量.

主要成果:

街头树木表土的变异性大约是公园树木表土的两倍,需要更密集的采样.
BSR的变异性与EC相似,而BD显示的变化最小.
为了获得高统计可靠性,需要大量的样本 (例如,BSR为44.4),但对于较低的确定性,需要更少的样本 (例如,BSR为6.8).

结论:

电导率 (EC) 测试被提议作为一个具有成本效益的基线测量,以评估表层土壤的空间变化.
这种方法可以为基底土壤呼吸 (BSR) 的采样策略提供信息,降低分析成本.
诸如土壤干扰和访问限制等因素影响在城市环境中采样设计和概括性.

关键词:

基本的土壤呼吸系统电导率是指电导的电导率.土壤干扰土壤干扰土壤质量土壤质量空间变化的空间可变性.城市林业城市林业

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