Stock, turnover and functions of carbon in heavily weathered soils under lowland rainforest transformation systems (A04)

在第二阶段，该项目将揭示碳储量减少和土壤退化的主要过程：在更广泛的生态背景下土壤有机质的侵蚀和矿化。本项目将重点研究集约化人工林土壤残碳稳定性的差异。新的方法，包括孵育，碳分馏，同位素组成，热解和三维荧光将被应用。该项目将通过提供关于森林转变为种植园后碳转化的存量、形式和过程的数据，重点关注碳的稳定性及其对土壤微生物的可用性，为计划中的CRC的总体目标做出强有力的贡献。该项目与调查地下系统变化的A、B和C组的其他项目密切结合，重点是土壤肥力、生产力、生态系统稳定性和建模前景。

In the 2nd phase the project will reveal the main processes of C stock decrease and soil degradation: erosion and mineralization of soil organic matter in a broader ecological context. The project will focus on the differences of stability of remaining soil C between intensive plantations. New approaches including incubations, C fractionation, isotopic composition, pyrolysis and 3D fluorescence will be applied. The project will strongly contribute to the overall goals of the planned CRC by providing data on stocks, forms and processes of C transformation after forest conversion to plantation by focusing on the stability of C and its availability for soil microorganisms. The project is closely integrated into other projects of groups A, B and C investigating changes in the belowground system with focus on soil fertility, productivity, ecosystem stability and modelling perspectives.