Canopy openness, proportion of deciduous trees and topsoil C/N ratio drive the yield, but their effect on the polyphenol content of medicinal plants is species-specific

IF 2.6 2区 农林科学 Q1 FORESTRY
Bogdan Jaroszewicz, Katarzyna Stojek, Helge Bruelheide, Quentin Ponette, Michael Scherer-Lorenzen, Kris Verheyen, Anna K. Kiss
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Abstract

Forests and woodlands are the major source of wild medicinal plants worldwide. In our study, we aimed to identify the factors influencing the yield and polyphenol content of Aegopodium podagraria L., Galium aparine L., Rubus fruticosus L., Rubus idaeus L., Stachys sylvatica L. and Urtica dioica L., the common and abundant medicinal plant species in the study areas. We showed that European temperate forests are potentially an important source of the medicinal resources. Light availability, controlled by canopy cover, proportion of deciduous trees and stand basal area were the most important factors positively influencing both abundance and quality of medicinal plants. The C/N ratio and pH of the topsoil were the most important factors positively influencing the content of phenolic compounds. The phenolic content was highly species-specific and varied according to local environmental conditions. A high proportion of deciduous species and a high canopy openness increased the yield and quality of medicinal plants by ensuring high light availability. Plants with high total polyphenol content should also be sought on biologically active (non-acidic) soils with a high C/N ratio. Our results can be used to guide forest management in areas where harvesting of understory medicinal plants is an important provisioning ecosystem service. In many cases a forest management scenario friendly to medicinal plants may require only a minor changes in forest management intensity, as cultivation or enhanced growth of MD plants can take place in intensively thinned forests and cleared forest patches, without competing with timber production.

Abstract Image

树冠开阔度、落叶树比例和表土 C/N 比决定了产量,但它们对药用植物多酚含量的影响因物种而异
森林和林地是全球野生药用植物的主要来源。在我们的研究中,我们的目标是找出影响 Aegopodium podagraria L.、Galium aparine L.、Rubus fruticosus L.、Rubus idaeus L.、Stachys sylvatica L.和 Urtica dioica L.产量和多酚含量的因素,这些植物是研究地区常见的丰富药用植物物种。我们的研究表明,欧洲温带森林可能是药用植物资源的重要来源。由树冠覆盖率、落叶树比例和林分基部面积控制的光照可用性是对药用植物的数量和质量产生积极影响的最重要因素。表土的 C/N 比和 pH 值是对酚类化合物含量产生积极影响的最重要因素。酚类化合物的含量具有高度的物种特异性,并因当地环境条件而异。落叶树种比例高和树冠开阔度高可确保光照充足,从而提高药用植物的产量和质量。总多酚含量高的植物还应生长在生物活性强(非酸性)、C/N 比值高的土壤中。我们的研究结果可用于指导森林管理,在这些地区,采伐林下药用植物是一项重要的生态系统服务。在许多情况下,对药用植物友好的森林管理方案可能只需要稍微改变森林管理强度,因为药用植物的栽培或强化生长可以在密集疏伐的森林和开垦的森林斑块中进行,而不会与木材生产竞争。
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来源期刊
CiteScore
5.10
自引率
3.60%
发文量
77
审稿时长
6-16 weeks
期刊介绍: The European Journal of Forest Research focuses on publishing innovative results of empirical or model-oriented studies which contribute to the development of broad principles underlying forest ecosystems, their functions and services. Papers which exclusively report methods, models, techniques or case studies are beyond the scope of the journal, while papers on studies at the molecular or cellular level will be considered where they address the relevance of their results to the understanding of ecosystem structure and function. Papers relating to forest operations and forest engineering will be considered if they are tailored within a forest ecosystem context.
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