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FOR 948 P9: The role of leaf senescence in relation to nitrogen uptake and translocation to the reproductive plant organs for genotypic differences in nitrogen efficiency of rapeseed (Projekt)
Decreasing the high nitrogen (N) balance surpluses in winter oilseed-rape production requires the breeding and cultivation of N-efficient cultivars. The overall objective of the project is the clarification of the role of leaf senescence and N mobilization from leaves in grain yield formation of rapeseed genotypes at limited N supply (N efficiency). The project thus represents the bridge between...
Förderzeitraum: 2009 - 2010
Relevanz: 100%
FOR 948 P10: Senescence and ammonium homeostasis in source and sink organs (Projekt)
Ammonium is a central intermediate in plant nitrogen metabolism and in particular during plant senescence ammonium is generated and re-assimilated at high rate. Imbalance in ammonium handling may lead to growth impairment and ammonia volatilization from the leaves. The overall aim of the project is to study bottle-necks in efficient ammonium assimilation and compartmentalisation in senescing...
Förderzeitraum: 2009 - 2010
Relevanz: 100%
FOR 948 P11: Selection of rapeseed genotypes for efficient uptake and retranslocation of nitrogen (Projekt)
NPZ-Lembke will contribute with different field trials to the proposed project. The plant material used in this study represents 7 NPZ elite winter rapeseed lines that have been selected according to their wide genetic distance. Further 6 winter rapeseed hybrids have also been included in the experimental program. The hybrids are included to test their agronomic performance regarding the response...
Förderzeitraum: 2009 - 2010
Relevanz: 100%
FOR 995 TZ: Project coordination, coordination and design of spatial sampling and geostatistical analyses of redox-sensitive SOM parameters in paddy soils (Projekt)
PZ is a project for coordinating activities of participating German research projects. It supports the Research Unit by supervising joint research tasks (e.g., planning, organisation and documentation of joint experiments), and by organisation of meetings, scientific exchange and workshops. PZ will design and organise a joint sampling campaign and a spatial sampling to investigate the plot-scale...
Förderzeitraum: 2008 - 2010
Relevanz: 100%
FOR 995 P1: Veränderungen in der mineralischen Zusammensetzung von paddy soils auf Redoxzyklen (Projekt)
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Förderzeitraum: 2008 - 2014
Relevanz: 100%
FOR 995 P2: Redox-controlled mineral-associated organic matter stabilization in paddy soils (Projekt)
Considerable amounts of organic matter are stabilized in paddy soils, and thus a large proportion of the terrestrial carbon is conserved in wetland rice soils. Nonetheless the mechanisms for stabilization of organic carbon in paddy soils as driven by redox cycling are largely unknown. The aim of project P2 is to identify the role of aggregation, organo-mineral complexes, charred OM and phytoliths...
Förderzeitraum: 2008 - 2010
Relevanz: 100%
FOR 995 P3: Cycling and ageing of amino acid nitrogen during paddy soil development (Projekt)
Rice is the world’s major crop, but it has low N utilization efficiency. This study is to contribute to a better understanding of present and past organic N cycles in paddy soils of the Yangtze Delta region in China. Soil samples will be collected from chronosequences of recent to ancient paddy soils (50 to 1000 years of rice cropping) and prehistoric ones (buried; several thousand years BP),...
Förderzeitraum: 2008 - 2010
Relevanz: 100%
FOR 995 P4: Production and stabilization of dissolved organic matter in paddy soils depending on redox conditions (Projekt)
The unique features of paddy soils favor large concentrations and fluxes of dissolved organic matter (DOM). Nevertheless, our knowledge about production and stabilization of DOM in paddy soils is scarce although this fraction of soil organic matter is important for greenhouse gas emission and carbon storage in soils. It is assumed that changing redox conditions are the key drivers of DOM dynamics...
Förderzeitraum: 2008 - 2010
Relevanz: 100%
FOR 995 P5: Microbial carbon and nitrogen cycling in recent and ancient paddy soils (Projekt)
The project aims to investigate the microbial gene pool involved in nitrogen and carbon turnover, and its induction by abiotic and biotic factors typical for paddy rice soils. Both processes are closely linked and form the basis for an ecological understanding of functionality and evolution of paddy rice soils from ancient time until today. Special attention will be paid to redox-controlled...
Förderzeitraum: 2008 - 2010
Relevanz: 100%
FOR 995 P6: 14C AMS as a tracer and dating tool in the study of paddy soil carbon dynamics (Projekt)
Paddy soils are open systems with a regular input of mineral and organic matter. Organic matter is lost through mineralization as gas (CO2, CH4), while both organic and mineral components are lost through leaching. Changing paddy soil properties thus not only reflect in-situ evolution of the soil material with time, but also the various organic and mineral mass inputs and outputs. Understanding...
Förderzeitraum: 2008 - 2010
