GRK 1397: Regulation of soil organic matter and nutrient turnover in organic agriculture

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Collaborative Project

Coordinating institution: Department of Environmental Chemistry

The regulation of the budget of soil organic matter (SOM) and nutrients by management is a central focus in agriculture, especially in organic agriculture. The budgets of SOM and nutrients determine soil fertility, i.e. the long-term productivity of soils. However, the underlying processes of soil fertility in organic agriculture are not well understood.

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Collaborative Projects

A

Leading institution: Department of Environmental Chemistry

Research projects

GRK 1397 A1: Effects of crop rotation and fertilization on labile C and N pools in sandy and silty soils under subtropical and temperate climates: experiments and modelling
GRK 1397 A2: Effects of tillage on labile C and N pools: experiments and modelling

B

Leading institution: Department of Environmental Chemistry

Research projects

GRK 1397 B1: Dynamics of ions in sandy and silty soils under unsaturated conditions: experiments and modelling
GRK 1397 B2: Modelling of ion dynamics in field experiments under different tillage systems

C

Leading institution: Department of Soil Biology and Plant Nutrition

Research projects

GRK 1397 C1: Decomposition and microbial colonization of double-labelled litter in litter bags or mixed with soil in soils from temperate and tropical climates from organic farming systems
GRK 1397 C2: Interactions between soil characteristics, above-ground biomass and soil microbial properties

D

Leading institution: Department animal nutrition and animal health

Research projects

GRK 1397 D1: Effects of different feeding regimes on the quality of manure from dairy cows in relation to the availability of nutrients for microbial and plant growth
GRK 1397 D2: Understanding the interaction of feeding, microbial activity and soil fertility

E

Leading institution: Soil Science of Temperate and Boreal Ecosystems

Research projects

GRK 1397 E1: Effect of fertilizer strategies (mineral fertilization, organic fertilization, N2 fixation) on N transformation and N2O emission in a crop rotation
GRK 1397 E2: Effect of humus accumulation in the topsoil on N dynamic with special consideration of N2O emissions

F

Leading institution: Institute of Crop Science

Research projects

GRK 1397 F1: Gaseous and leachate losses of C and N from fertilized and irrigated soils of a subtropical coastal oasis
GRK 1397 F2: Gaseous and leachate losses of C and N from fertilized and irrigated soils of subtropical mountain oasis

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