中国吉林省西部莱姆斯和长期盐碱胁迫土壤中多种营养元素的生态平衡关系

IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY Rangeland Ecology & Management Pub Date : 2024-08-31 DOI:10.1016/j.rama.2024.07.013
Xingyi Wang, Jingfa Zhong, Yuefen Li
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引用次数: 0

摘要

被认为是恢复盐碱土壤的重要植物。长期遭受盐碱胁迫的土壤中多种营养元素的生态平衡尚不清楚,这阻碍了我们对植物-土壤环境中营养循环调节机制的了解。我们研究了吉林省西部盐碱地土壤中的营养元素水平。土壤分析表明,可利用的氮、钾、磷、钼、锰、铁、铜和锌的含量为中高水平。锰/铁和氮/磷的比率超过了中国全国土壤的平均水平,而铁/铜、铁/锌和磷/钾的比率则相对较低。此外,锰、锌、钾、钼/锰、钼/锌、铁/锌比值均显著高于健康植株,而锰/铁、磷/钾比值则呈相反趋势。土壤 pH 值对土壤和植株中元素的化学计量影响最大。特别是,土壤中可利用的锰、锌、钾以及锰、铁、铜和磷的含量对 pH 值的波动非常敏感。此外,我们还观察到土壤可利用元素浓度与化学计量比之间存在明显的协同或拮抗作用。其中,只有锰、铁、铁/锌、钼/锌、氮/钾和钼/铁之间存在显著的模型效应(< 0.05)。钼/铁平衡指数最低,为 0.97,其次是铁(1.16)、氮/钾(2.28)、钼/锌(2.59)、铁/锌(3.38)和锰(4.92),其他元素及其化学计量比保持稳定。总体而言,作为盐碱地土壤中的主要物种,Ⅴ表现出高度的平衡性。
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Ecological Stoichiometry of Multiple Nutrients in Leymus chinensis and Soils Subjected to Long-Term Saline-Sodic Stress in Western Jilin Province, China
is considered an important plant for saline-sodic soil restoration. Ecological stoichiometry of multiple nutrient elements in and soils subjected to long-term saline-sodic stress remains unclear, which hinders our understanding of the mechanisms regulating nutrient cycling in the plant-soil environment. We examined nutrient element levels in saline-sodic soil and in western Jilin Province. Soil analysis revealed medium to high levels of available N, K, P, Mo, Mn, Fe, Cu, and Zn. The Mn/Fe and N/P ratios exceeded the national soil average of China, while those of Fe/Cu, Fe/Zn, and P/K were comparatively lower. Furthermore, exhibited deficiencies in the Mn, Zn, and P. Mo/Mn, Mo/Zn, and Fe/Zn ratios, which were significantly higher compared to healthy plants, while Mn/Fe and P/K showed the opposite trend. Soil pH had the most significant effect on element stoichiometry in both the soil and in . Particularly, the soil available Mn, Zn, K, along with Mn, Fe, Cu, and P levels exhibited sensitivity to pH fluctuations. Additionally, we observed significant synergistic or antagonistic effects between the soil available element concentration and stoichiometry ratios. Among these, only Mn, Fe, Fe/Zn, Mo/Zn, N/K, and Mo/Fe in were significantly modeled ( < 0.05). The Mo/Fe homeostasis index was the lowest at 0.97, followed by Fe (1.16), N/K (2.28), Mo/Zn (2.59), Fe/Zn (3.38), and Mn (4.92), while other elements and their stoichiometric ratios remained stable. Overall, , as the dominant species in saline-sodic soil, demonstrated high homeostasis.
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来源期刊
Rangeland Ecology & Management
Rangeland Ecology & Management 农林科学-环境科学
CiteScore
4.60
自引率
13.00%
发文量
87
审稿时长
12-24 weeks
期刊介绍: Rangeland Ecology & Management publishes all topics-including ecology, management, socioeconomic and policy-pertaining to global rangelands. The journal''s mission is to inform academics, ecosystem managers and policy makers of science-based information to promote sound rangeland stewardship. Author submissions are published in five manuscript categories: original research papers, high-profile forum topics, concept syntheses, as well as research and technical notes. Rangelands represent approximately 50% of the Earth''s land area and provision multiple ecosystem services for large human populations. This expansive and diverse land area functions as coupled human-ecological systems. Knowledge of both social and biophysical system components and their interactions represent the foundation for informed rangeland stewardship. Rangeland Ecology & Management uniquely integrates information from multiple system components to address current and pending challenges confronting global rangelands.
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