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修剪是否会影响兴都库什山脉东部杜松林地的结构和生态生产力?

Does pruning affect the structural and ecological productivity of Juniper woodlands in the eastern Hindu Kush?

作者信息

Din Nasir Ud, Khan Nasrullah, Ullah Rafi, Okla Mohammad K, Abdel-Maksoud Mostafa A, Saleh Ibrahim A, Abu-Harirah Hashem A, AlRamadneh Tareq Nayef

机构信息

Department of Botany, University of Malakand, Khyber Pakhtunkhwa, Pakistan.

Department of Botany, Dr. Khan Shaheed Govt: Degree College Kabal Swat, Khyber Pakhtunkhwa, Pakistan.

出版信息

PeerJ. 2025 Jun 17;13:e19184. doi: 10.7717/peerj.19184. eCollection 2025.

Abstract

species play a crucial role in the ecological dynamics of the eastern Hindu Kush region in Pakistan, growing either as mono-specific stands or co-occurring in species-poor communities on mountainous scree slopes, as well as near agricultural and residential areas. Despite their limited population, these trees offer a diverse range of ecosystem services, emphasizing the intricate interdependence between human and natural ecosystems. Given their ecological and commercial importance, local people employ silvicultural practices, such as pruning, to ensure sustainable management. The present study, therefore, aimed to assess conventional pruning practices in the region to understand their impacts on stand structure and ecological productivity. The findings indicated that pruning at an intensity of 30-40% was particularly effective, significantly enhancing dendrometric and reproductive traits, such as height, growth rates, and the production of viable seeds (ANOVA,  < 0.05). Additionally, both diameter at breast height (DBH) and diameter at root collar (DRC) showed positive trends, although the effects were not statistically significant (ANOVA,  > 0.05). Conversely, pruning intensities exceeding 60% exhibited adverse effects on the tree metrics. Our results also highlight the importance of pruning intensities in regulating understory vegetation, soil nutrient dynamics, and the carbon storage capacity of junipers. Notably, moderate pruning demonstrates positive impacts on living carbon biomass (LCB) and on soil organic carbon (SOC) density. In conclusion, adopting moderate-intensity pruning techniques with standard scientific measures could be an effective strategy, not only for improving the structural parameters and carbon budgets amid changing climate conditions but also for ensuring long-term economic advantages in the region.

摘要

物种在巴基斯坦东部兴都库什地区的生态动态中发挥着关键作用,它们要么以单一种群的形式生长,要么在山区碎石坡以及农业和居民区附近物种匮乏的群落中共同出现。尽管这些树木的数量有限,但它们提供了多种生态系统服务,凸显了人类与自然生态系统之间复杂的相互依存关系。鉴于其生态和商业重要性,当地居民采用诸如修剪等造林实践来确保可持续管理。因此,本研究旨在评估该地区的传统修剪实践,以了解其对林分结构和生态生产力的影响。研究结果表明,强度为30%-40%的修剪尤为有效,显著提高了树木测量和繁殖特征,如高度、生长速率和 viable种子的产量(方差分析,<0.05)。此外,胸径(DBH)和根颈直径(DRC)均呈现出积极趋势,尽管影响在统计学上不显著(方差分析,>0.05)。相反,超过60%的修剪强度对树木指标产生了不利影响。我们的研究结果还强调了修剪强度在调节林下植被、土壤养分动态和杜松碳储存能力方面的重要性。值得注意的是,适度修剪对活碳生物量(LCB)和土壤有机碳(SOC)密度具有积极影响。总之,采用标准科学措施的中等强度修剪技术可能是一种有效策略,不仅有助于在气候变化条件下改善结构参数和碳预算,还能确保该地区的长期经济优势。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/223b/12180449/46f2dd5b1294/peerj-13-19184-g001.jpg

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