Description: Das Projekt "Microbial P mobilization and immobilization in the rhizosphere and root-free soil (SPP: P Nutrition & recycling)" wird vom Umweltbundesamt gefördert und von Universität Bayreuth, Fachgruppe Geowissenschaften, Bayreuther Zentrum für Ökologie und Umweltforschung (BayCEER), Lehrstuhl für Bodenökologie durchgeführt. Soil microorganisms can mobilize and immobilize phosphorus (P), and therefore strongly affect the availability of P to plants. In this project we hypothesize that the ratio of labile P to microbial P increases during the transition from acquiring to recycling ecosystems. Microbial and plant P uptake will be studied with 33P that will be quantified in microbial and plant biomass as well as in lipids. To what extent microorganisms immobilize and mobilize P during decomposition of soil organic matter will be explored with a 14C/33P labeled monoester. Seasonal dynamics of actual and potential P mineralization (33P dilution and phosphatase activity), and microbial P immobilization will be studied with soils of the transition from acquiring to recycling ecosystems. The contribution of litter-derived P will be explored in a litter exclusion experiment in the field. Spatial patterns of microbial and plant P mineralization in the rhizosphere will be explored by analyses of areas of high acid and alkaline (=microbial-derived) phosphatase activity by soil zymography, and their relations with areas of high rhizodeposition (14C imaging). In conclusion, we will analyse mechanisms of actual and potential microbial P mineralization and immobilization, localization, and consequences for P uptake by plants.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Recycling ? Bodenökologie ? Humus ? Lipid ? Ökologie ? Phosphor ? Skigebiet ? Primärbatterie ? Bodenmikroorganismen ? Recyclingquote ? Rhizosphäre ? Siedlungsabfall ? Wirkung ? Pflanzenwurzel ? Pflanzenverfügbarkeit ? Verwitterung ? Mineralisation ? Phytomasse ? Recyclingpotenzial ? Umweltforschung ? Verdünnung ? Bodenökosystem ? Bodenuntersuchung ? Mikroorganismen ? Säure ? Boden ? Biologische Aktivität ? Ökosystem ? Ernährung ? DEMOBILISIERUNG ? Ortsbestimmung ? POTENZIAL ? PROJEKT ? STARK ? VERHAELTNIS ? Vermehrung ? EXPERIMENT ? Bepflanzung ? FREI ? MECHANISMEN ?
Region: Bayern
Bounding box: 12.53381° .. 12.53381° x 47.795° .. 47.795°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2013-01-01 - 2024-11-29
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