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
• 负责人: Professorin Dr. Ingrid Kögel-Knabner
• 金额: --
• 依托单位: Institute of Soil Science
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/60208804?language=en
• 关键词: Organic; matter; stabilisation; during; paddy

The aim of project is to identify the role of microaggregation, organo-mineral complexes, and charred organic carbon for the stabilisation of organic carbon in paddy soils. A method consisting of a combination of physical (particle-size and density) and chemical fractionation methods will be adapted to each soil type specifically to isolate aggregates and organo-mineral complexes in soil-type specific soil organic matter (SOM) fractions. The isolated fractions will then be analyzed for the chemical composition of the organic matter by solid-state 13C NMR spectroscopy and specifically for the hydrolysable carbohydrate content by GC-MS. The age of the stable organic matter in selected fractions will be assessed by radiocarbon analysis. The organo-mineral associations will be characterized by selective or total removal of minerals and organic substances in combination with analysis of specific surface area. Soil fractions will be investigated by SEM and NanoSIMS to elucidate the composition of microaggregates and organo-mineral complexes. This will enable us to understand the influence of the parent soil type on aggregation and soil organic carbon stabilisation in dependence of e.g. type and content of iron oxides, and to evaluate the contribution of the different SOM stabilisation processes during paddy soil formation.

项目的目的是确定微聚集，有机矿物络合物和烧焦有机碳在稻田中有机碳的稳定作用。一种由物理（颗粒大小和密度）和化学分馏方法组合组合的方法将适用于每种土壤类型，专门用于隔离土壤型特异性土壤有机物（SOM）分数中的聚集体和有机矿物质络合物。然后，将通过固态13C NMR光谱法，专门针对GC-MS的水解碳水化合物含量分析分离的分数，以分析有机物的化学组成。选定部分中稳定有机物的年龄将通过放射性碳分析评估。有机矿物的关联将以选择性或​​总去除矿物质和有机物质以及特定表面积的分析。 SEM和Nanosims将研究土壤分数，以阐明微聚集物和有机矿物络合物的组成。这将使我们能够了解父型土壤类型对例如铁氧化物的类型和含量，并评估稻田形成过程中不同SOM稳定过程的贡献。

项目成果

Management-induced organic carbon accumulation in paddy soils: The role of organo-mineral associations

• DOI: 10.1016/j.still.2012.08.004
• 发表时间: 2013
• 期刊: Soil & Tillage Research
• 影响因子: 6.5
• 作者: L. Wissing;A. Kölbl;W. Häusler;P. Schad;Z. Cao;I. Kögel‐Knabner