伊朗扎格罗斯森林外来树种和本地树种叶片养分再转运的时间变化。

IF 3.9 2区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Mahnaz Karamian, Javad Mirzaei, Mehdi Heydari, Yahya Kooch, Daniel C-F S Dey
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引用次数: 0

摘要

干旱和半干旱地区退化林区的人工林在恢复生态系统、控制侵蚀和支持当地生计方面发挥着至关重要的作用。然而,关于外来树种和本地树种如何影响土壤和树叶的养分动态,特别是关于养分再转运,人们知之甚少。在4月上旬至9月下旬的6个月时间里,研究了两种外来针叶树种(柏树、松木)和两种本土阔叶树种(苦杏仁、栎)30年的人工林叶片养分浓度的季节变化和养分再转运模式。研究结果揭示了物种群之间的显著差异。阔叶植物的氮、磷、钾、镁等营养物质含量普遍高于针叶植物,而碳氮比则低于针叶植物。季节效应明显,春季叶片养分含量普遍高于夏季。养分重转运的顺序为:Ca
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Temporal variation of leaf nutrient retranslocation in exotic and indigenous tree species in Zagros forests, Iran.

Plantations in degraded forest areas in arid and semi-arid regions play a vital role in restoring ecosystems, controlling erosion, and supporting local livelihoods. However, little is known about how exotic and native tree species influence nutrient dynamics in soil and foliage, particularly regarding nutrient retranslocation. This study evaluated seasonal variation in leaf nutrient concentrations and nutrient retranslocation patterns over a 6-month period (early April to late September) in 30-year-old plantations of two exotic needleleaf species (Cupressus arizonica, Pinus eldarica) and two indigenous broadleaf species (Amygdalus scoparia, Quercus brantii). The findings revealed significant differences among species groups. Broadleaf species generally exhibited higher concentrations of leaf nutrients (such as nitrogen (N), phosphorus (P), potassium (K), and magnesium (Mg) and lower C: N ratios than needleleaf species. Seasonal effects were evident, with leaf nutrient content generally higher in spring than in summer. The order of nutrient retranslocation was as follows: Ca < C < K < Mg < N < P. Further analysis using principal components highlighted the differences between broadleaf and needleleaf plantations in terms of soil and leaf nutrient status. These findings suggest that, due to its native status and greater contribution to soil fertility, Q. brantii is a suitable choice for reforestation in similarly degraded environments.

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来源期刊
Scientific Reports
Scientific Reports Natural Science Disciplines-
CiteScore
7.50
自引率
4.30%
发文量
19567
审稿时长
3.9 months
期刊介绍: We publish original research from all areas of the natural sciences, psychology, medicine and engineering. You can learn more about what we publish by browsing our specific scientific subject areas below or explore Scientific Reports by browsing all articles and collections. Scientific Reports has a 2-year impact factor: 4.380 (2021), and is the 6th most-cited journal in the world, with more than 540,000 citations in 2020 (Clarivate Analytics, 2021). •Engineering Engineering covers all aspects of engineering, technology, and applied science. It plays a crucial role in the development of technologies to address some of the world''s biggest challenges, helping to save lives and improve the way we live. •Physical sciences Physical sciences are those academic disciplines that aim to uncover the underlying laws of nature — often written in the language of mathematics. It is a collective term for areas of study including astronomy, chemistry, materials science and physics. •Earth and environmental sciences Earth and environmental sciences cover all aspects of Earth and planetary science and broadly encompass solid Earth processes, surface and atmospheric dynamics, Earth system history, climate and climate change, marine and freshwater systems, and ecology. It also considers the interactions between humans and these systems. •Biological sciences Biological sciences encompass all the divisions of natural sciences examining various aspects of vital processes. The concept includes anatomy, physiology, cell biology, biochemistry and biophysics, and covers all organisms from microorganisms, animals to plants. •Health sciences The health sciences study health, disease and healthcare. This field of study aims to develop knowledge, interventions and technology for use in healthcare to improve the treatment of patients.
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