Stabilization of organic matter by layer silikates - quality and turnover of interaction products

通过层状硅酸盐稳定有机物 - 相互作用产品的质量和周转

• 批准号: 5247490
• 负责人: Professor Dr. Reinhold Jahn
• 金额: --
• 依托单位: Professur für Bodenkunde und Bodenschutz
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2000
• 资助国家: 德国
• 起止时间: 1999-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5247490?language=en
• 关键词: Stabilization; organic; matter; layer; silikates

The overall goal of this proposal is to determine quantitative andqualitative relationships between carbon sequestration and clay mineralogy. The idea behind the project is that a extended period of fertilizer depletion combined with continued nutrient removal through plants will lead to changes in organic matter composition as well as to changes in the clay minerals assemblage (mainly through K-depletion in illitic materials). This in turn implies modifications in the physical properties as well as in the stability of the predominating clay-organic matter associations. We intend to investigate such changes on short, medium and long timescales. We will use experiments dating from 1902, 1956 and 1982. The overall goal will be devided in the following subgoals: a) which are the mechanisms behind the protective capacity of the mineral assemblage, b) what is the influence of clay mineralogy on stabilisation rates, c) how does theclay mineral assemblage influence proportion and type of organic matter associated with clay minerals, d) are there pathways from the pool of easily degradable organic matter into the pool of organic matter, that is stabilized through interaction with clay minerals, e) which rates of transfer are applicable here.

本提案的总体目标是确定碳固存和粘土矿物之间的定量和定性关系。该项目背后的想法是，长期的肥料消耗加上通过植物持续去除营养物质将导致有机物组成的变化以及粘土矿物组合的变化（主要是通过矿物材料中的钾消耗）。这反过来意味着物理性质的改变以及主要的粘土-有机质组合的稳定性的改变。我们打算在短期、中期和长期的时间尺度上研究这些变化。我们将使用1902年、1956年和1982年的实验。总体目标将分为以下几个子目标：A)矿物组合保护能力背后的机制是什么，b)粘土矿物对稳定率的影响是什么，c)粘土矿物组合如何影响与粘土矿物相关的有机质的比例和类型，d)容易降解的有机质池是否有途径进入通过与粘土矿物相互作用稳定的有机质池，e)这里适用的转移速率是什么。