6th International Symposium
on Soil Organic Matter

Healthy soils for sustainable agriculture: the role of SOM
3–7 September 2017 • Rothamsted Research • Harpenden (United Kingdom)

6th International Symposium
on Soil Organic Matter

Healthy soils for sustainable agriculture: the role of SOM
3–7 September 2017 • Rothamsted Research • Harpenden (United Kingdom)

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Session 6c: SOM in rice paddy systems

Chair:   Pan Genxing (University of Nanjing, CN)

Soils under reduced conditions include rice paddy soils and wetlands (including peatlands). These soils are particularly important for buffering water, carbon and nutrient salts in earth surface. The persistence of organic matter in these soils may be subject to water regime, redox and mineralogy as well as organic inputs. In this session, SOM level and the dynamic in these soil with human disturbance, urbanization, climate change and as well as management intervention will be addressed. The organic chemistry, particularly, the molecular and functional group composition and their interactions with soil minerals will be discussed. At particular, microscale insight of biogeochemical cycling of C, N and P as well as other life elements will be addressed and novel methodologies exploring allocation of SOM in alignment with minerals, microbes and even predators in soil aggregate classes will be discussed. Interests will be given also to microbial biomass, microbial activities and taxa-specific changes in soil biota with special reference to SOM dynamics in reduced soils with drying and warming climate. Characterization at aggregate level of SOM abundance, micro-pores and microbial biomass and activities using high resolution technologies like Nano-SIMS, Demography of micro-CT and others. Modeling of C/N pools related to soil respiration and GHG emissions and modeling of SOM dynamics in these reduced conditions soils will be treated with some prevalent models. Cross-edging issues and potential gaps between molecular study, field study and modeling studies would also be explored.