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
• 负责人: Professorin Dr. Ingrid Kögel-Knabner
• 金额: --
• 依托单位: Lehrstuhl für Bodenkunde
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/168309551?language=en
• 关键词: Competition; forest; soils; stabilization; organic

The overall objective of this project is to elucidate the major competitive stabilization and destabilization processes of soil organic nitrogen (SON). Our results from the previous research show that the association in organo-mineral compounds is the major process for N stabilization in Rendzina soils investigated by the research group. This will be achieved by participating in the joined short- and long-term mini-lysimeter experiments at the NE and SW slope of Tuttlingen as well as the ongoing 15N litter labelling experiment. 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 organomineral associations. At the same time, the experiments provide information on responses of climate change conditions on in situ SON stabilization processes. The physical soil fractionation scheme will provide a quantitative evaluation of the amount of N stabilized in organo-mineral associations. Overall, we will provide information on the competition for N between plants, microorganisms and soil by taking into account the formation and slow turnover of recalcitrant organic N pools, especially the organo-mineral N in soil.

本项目的总体目标是阐明土壤有机氮（SON）的主要竞争稳定和不稳定过程。前期研究结果表明，有机无机化合物的结合是Rendzina土壤氮素稳定化的主要过程。这将通过参加在图特林根东北和西南斜坡的短期和长期小型蒸渗仪实验以及正在进行的15 N凋落物标记实验来实现。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，通过形成的有机矿物协会。同时，实验提供了气候变化条件对原位SON稳定过程的响应信息。物理土壤分级方案将提供一个定量评价的有机无机协会的N稳定量。总体而言，我们将提供有关植物，微生物和土壤之间的氮竞争的信息，考虑到形成和缓慢周转的柠檬酸有机氮库，特别是土壤中的有机无机氮。

项目成果

Decoupled carbon and nitrogen mineralization in soil particle size fractions of a forest topsoil

• DOI: 10.1016/j.soilbio.2014.08.001
• 发表时间: 2014-11-01
• 期刊: SOIL BIOLOGY & BIOCHEMISTRY
• 影响因子: 9.7
• 作者: Bimueller, Carolin;Mueller, Carsten W.;Koegel-Knabner, Ingrid
• 通讯作者: Koegel-Knabner, Ingrid