competition for N in Forest Soils: Stabilization of Organic N in Recalcitrant Pools

森林土壤中氮的竞争:顽固池中有机氮的稳定

基本信息

项目摘要

Our knowledge of the competition for N in forest soils is confounded by incomplete understanding of the partitioning between plants, mycorrhizal fungi, soil microbes and sequestration of N into SOM. A combined approach of field and laboratory investigations together with 15N labelling experiments is proposed to elucidate the major competitive long-term stabilization mechanisms of organic N and the formation and structure of DON. Quantitative data will be generated on the N transferred to non-microbial, recalcitrant organic matter pools and, thus, the relevance of major long-term stabilization processes via formation of tannin-protein complexes, organo-mineral associations and abiotic N immobilization. Solid-state 15N and 13C NMR spectroscopy will provide information on the binding forms of organic N, MALDI-TOF-MS on tannins in tannin-protein complexes. Chemolytic techniques will allow to quantify hydrolysable proteins in bulks soils and organo-mineral complexes. In the framework of the research group this approach will allow to differentiate and to quantify the stabilization of organic N versus the organic N present in labile forms. In the end this will provide information on the competition for N between plants and microorganisms taking into account the formation and slow turnover of recalcitrant organic N pools in soil.
我们的知识在森林土壤中的N竞争是混淆不完全的理解植物,菌根真菌,土壤微生物之间的分区和固存的N到SOM。结合现场和实验室调查与15 N标记实验的方法,提出了阐明主要的竞争性长期稳定机制的有机N和DON的形成和结构。将产生的定量数据上的N转移到非微生物的,可再生的有机物池,因此,主要的长期稳定过程的相关性,通过形成单宁蛋白质复合物,有机-矿物协会和非生物N固定。固态15 N和13 C NMR光谱将提供有关单宁-蛋白质复合物中单宁的有机N,MALDI-TOF-MS结合形式的信息。化学分解技术将允许量化散装土壤和有机矿物复合物中的水解蛋白质。在研究小组的框架内,这种方法将允许区分和量化有机氮与不稳定形式的有机氮的稳定性。最后,考虑到土壤中有机氮库的形成和缓慢周转,这将提供关于植物和微生物之间的氮竞争的信息。

项目成果

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Professorin Dr. Ingrid Kögel-Knabner其他文献

Professorin Dr. Ingrid Kögel-Knabner的其他文献

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{{ truncateString('Professorin Dr. Ingrid Kögel-Knabner', 18)}}的其他基金

Soil structure formation through the action of plants and microbes
通过植物和微生物的作用形成土壤结构
  • 批准号:
    298892158
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Nachwuchsakademie "Agrarökosystemforschung: Bodenressourcen und Pflanzenproduktion"
青年学院“农业生态系统研究:土壤资源与农作物生产”
  • 批准号:
    271137581
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Workshops for Early Career Investigators
Differentiating the roles of organic nuclei and mineral surfaces in the formation of soil microaggregates by exploring their elemental and isotopic label composition
通过探索有机核和矿物表面的元素和同位素标记组成,区分有机核和矿物表面在土壤微团聚体形成中的作用
  • 批准号:
    276973106
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Units
The parent material as major factor for the properties of the biogeochemical interface: Integrative analysis
母质作为生物地球化学界面特性的主要因素:综合分析
  • 批准号:
    231002717
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
Competition for N in forest soils: stabilization of organic N in recalcitrant pools
森林土壤中氮的竞争:顽固池中有机氮的稳定
  • 批准号:
    168309551
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Nano-SIMS for soil science - exploring elemental distribution, formation and properties of submicron sized particles in soils
用于土壤科学的纳米 SIMS - 探索土壤中亚微米颗粒的元素分布、形成和特性
  • 批准号:
    119111086
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Coordination of the Research Unit and development of a conceptual model of paddy soil evolution
研究单位的协调和水稻土演化概念模型的开发
  • 批准号:
    60229052
  • 财政年份:
    2008
  • 资助金额:
    --
  • 项目类别:
    Research Units
Organic matter stabilisation during paddy soil development depending on soil type
稻田土壤发育过程中有机质的稳定性取决于土壤类型
  • 批准号:
    60208804
  • 财政年份:
    2008
  • 资助金额:
    --
  • 项目类别:
    Research Units
Cutin-, Suberin- und Ligninsignatur als Biomarker forstlicher Nutzbaumarten in Böden
角质、木栓质和木质素特征作为土壤中森林树种的生物标志物
  • 批准号:
    50746327
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Biogeochemical interface formation in soils as controlled by different components
土壤中生物地球化学界面的形成受不同成分的控制
  • 批准号:
    40976401
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes

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基于深度森林(Deep Forest)模型的表面增强拉曼光谱分析方法研究
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