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SPP 1090 AG 2: Characterisation of the sodium pyrophosphate extractable soil organic matter with FT-IR
Project
Project code: DFG SPP 1090
Contract period: 01.01.2000
- 01.01.2006
Purpose of research: Basic research
Composition and amount of soil organic matter (SOM) are influenced by land use. The SOM could be divided into different pools according to decomposability and solubility. The water soluble part of SOM could be used to receive the slightly decomposable part of SOM. a higher amount of SOM is extracable. Sodium pyrophosphate solution additionally extracts organic compounds from organo mineralic complexes due to the break down of binding forces. A sequential extraction with water and sodium pyrophosphate solution is essential to obtain the slightly decomposable and the decomposable part of SOM. There is a lack of understanding the functional composition of these pools and their relation to different kinds of land use. The objective of this study is to quantify the slightly decomposable and the decomposable pools of SOM, and to investigate their functional composition with FT-IR spectroscopy. The results will be used to validate soil organic matter turnover models (for example Roth 23.6) and to add a qualitative term to the model concerning the functionality of SOM.
Section overview
Subjects
- Soil science
