Advancing predictive understanding of tree organic and inorganic nitrogen uptake across forest biomes
文献类型：期刊论文
| 作者 | Liu, Min2,3; Xu, Xingliang2,3; Jin, Peng2,3; Bruelheide, Helge4,6; Kuzyakov, Yakov1,8; Bardgett, Richard D.7; Wanek, Wolfgang5 |
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2026-02-01 |
| 卷号 | 213页码:110027 |
| 关键词 | 15 N labelling Root nitrogen uptake Temperate forests Subtropical forests Tropical forests Root traits Functional genes |
| ISSN号 | 0038-0717 |
| DOI | 10.1016/j.soilbio.2025.110027 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Plants uptake nitrogen (N) from soils in inorganic forms, such as ammonium (NH4+) and nitrate (NO3- ), but also in the form of organic compounds like amino acids. Despite extensive research on terrestrial N cycling, the patterns and underpinning mechanisms of inorganic and organic N uptake by tree species across forest biomes remained very uncertain. To address this knowledge gap, we conducted field-based hydroponic labelling experiments on 34 tree species spanning from temperate to subtropical and tropical climate zones. We assessed uptake rates of nine common amino acids (15N and 13C dual-labelled) alongside with NH4+ and NO3 -(15N-labelled) at micromolar concentrations. Root morphological traits, soil chemical properties, soil N pool sizes and microbial N functional genes were determined to assess their role in explaining differential N uptake among tree species and forest biomes. Our results demonstrated stable N uptake rates and preferences across all forest biomes but showed large differences among N forms. Such N uptake was predominantly affected by N intrinsic properties, followed by effects of soil properties and microbial N functional genes on soil N availability, while controls by tree root traits were weakest. Mean uptake rates of single amino acids contributed to 39 % of the total root N uptake, with NH4+ showing the highest (56 %), and NO3 -showing the lowest uptake rates (5.0 %). Uptake rates of positively charged and high N% amino acids such as arginine, histidine, and lysine were fastest, i.e., 0.98, 0.81, and 0.78 mu g N g- 1 d. w. root h-1, respectively. Nitrogen uptake rates were faster when trees have longer and thinner fine roots, in soils with higher pH and phosphorus (P) availability and faster microbial N turnover. Our findings highlight the important role of organic N and NH4+ for tree nutrition and reveal how tree N uptake is influenced (in increasing importance) by tree root morphological traits, soil microbial N functional composition, soil resource availability, and N form intrinsic properties. These findings provide profound quantitative and predictive insights into our understanding of forest N sink processes, offering a scientific foundation for optimizing global forestry N management strategies in the context of environmental change. |
| URL标识 | 查看原文 |
| WOS关键词 | AMINO-ACIDS ; ROOT TRAITS ; SOIL ; CARBON ; PLANTS ; AMMONIUM ; NITRATE ; MINERALIZATION ; PERSPECTIVE ; MECHANISMS |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:001615652200001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/219775]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Xu, Xingliang |
| 作者单位 | 1.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Dept Agr Soil Sci, D-37077 Gottingen, Germany; 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11A Datun Rd, Beijing 100101, Peoples R China; 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China; 4.Martin Luther Univ Halle Wittenberg, Inst Biol, Geobot & Bot Garden, Kirchtor 1, D-06108 Halle, Saale, Germany; 5.Univ Vienna, Ctr Microbiol & Environm Syst Sci, Dept Microbiol & Ecosyst Sci, Div Terr Ecosyst Res, Althanstr 14, A-1090 Vienna, Austria 6.German Ctr Integrat Biodivers Res iDiv, Puschstr 4, D-04103 Leipzig, Germany; 7.Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England; 8.Peoples Friendship Univ Russia, RUDN Univ, Moscow 117198, Russia; |
| 推荐引用方式 GB/T 7714 | Liu, Min,Xu, Xingliang,Jin, Peng,et al. Advancing predictive understanding of tree organic and inorganic nitrogen uptake across forest biomes[J]. SOIL BIOLOGY & BIOCHEMISTRY,2026,213:110027. |
| APA | Liu, Min.,Xu, Xingliang.,Jin, Peng.,Bruelheide, Helge.,Kuzyakov, Yakov.,...&Wanek, Wolfgang.(2026).Advancing predictive understanding of tree organic and inorganic nitrogen uptake across forest biomes.SOIL BIOLOGY & BIOCHEMISTRY,213,110027. |
| MLA | Liu, Min,et al."Advancing predictive understanding of tree organic and inorganic nitrogen uptake across forest biomes".SOIL BIOLOGY & BIOCHEMISTRY 213(2026):110027. |
入库方式： OAI收割
来源：地理科学与资源研究所
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