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Factors controlling phosphorous availability and their relevance for phosphorous nutrition of forest stands

English title Factors controlling phosphorous availability and their relevance for phosphorous nutrition of forest stands
Applicant Luster Jörg
Number 149138
Funding scheme Project funding (Div. I-III)
Research institution Eidgenössische Forschungsanstalt WSL für Wald, Schnee und Landschaft
Institution of higher education Swiss Federal Institute for Forest, Snow and Landscape Research - WSL
Main discipline Geochemistry
Start/End 01.12.2013 - 30.11.2017
Approved amount 290'744.00
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Keywords (7)

phosphorus; forest soils; rhizosphere; nutrient mobilisation; plant-soil-microbe interactions; beech; spruce

Lay Summary (German)

Lead
Eine genügende Versorgung von Böden mit Phosphor (P) ist essentiell für die Nahrungsmittelproduktion und für die Gesundheit natürlicher Ökosysteme. Exzessive Düngung mit Phosphaten in der Landwirtschaft hat einerseits die nicht erneuerbaren mineralischen P-Resourcen stark ausgebeutet, andererseits zur Eutrophierung von Gewässern geführt. In P-armen natürlichen Ökosystemen haben sich effiziente Nährstoff-Recycling-Mechanismen entwickelt, die noch ungenügend untersucht sind.
Lay summary

Inhalt und Ziel des Forschungsprojektes

Die zentrale Hypothese des übergeordneten Schwerpunkt-Programmes ist, dass Wälder mit abnehmender Verfügbarkeit an mineralischem Phosphor (P) sich von P-erwerbenden zu P-rezyklierenden Systemen entwickeln. Bei ersteren wird P vorwiegend aus Mineralen aufgenommen, und es geht relativ viel P durch Auswaschung verloren. Bei letzteren wird P vor allem aus organischen Verbindungen aufgenommen und wird praktisch verlustfrei im Pflanzen-Humus-System rezykliert. In unserem Projekt untersuchen wir in Böden mit unterschiedlicher P-Versorgung Interaktionen zwischen Pflanzenwurzeln, Mikroorganismen und Boden auf der Mikroskala. Wir wollen prüfen, in wie weit Hauptbaumarten wie die Buche und Fichte in der Lage sind, den wurzelnahen Raum so zu beeinflussen, dass ihr Bedarf an P gedeckt wird. 

 

Wissenschaftlicher und gesellschaftlicher Kontext des Forschungsprojektes

Unsere Arbeit wird neue Erkenntnisse zur Mobilisierung von P für die Pflanzenaufnahme liefern. Der Förster kann daraus waldbauliche Massnahmen im Hinblick auf eine nährstoff-effiziente Bewirtschaftung ableiten. Die vertieften Einblicke in P-Recycling-Mechanismen von Wäldern helfen, Strategien für eine weniger P-Resourcen verschleudernde Landwirtschaft zu entwickeln.

Direct link to Lay Summary Last update: 19.11.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Plant Nutritional Status Explains the Modifying Effect of Provenance on the Response of Beech Sapling Root Traits to Differences in Soil Nutrient Supply
Meller Sonia, Frossard Emmanuel, Spohn Marie, Luster Jörg (2020), Plant Nutritional Status Explains the Modifying Effect of Provenance on the Response of Beech Sapling Root Traits to Differences in Soil Nutrient Supply, in Frontiers in Forests and Global Change, 3, 535117.
Phosphorus Allocation to Leaves of Beech Saplings Reacts to Soil Phosphorus Availability
Meller Sonia, Frossard Emmanuel, Luster Jörg (2019), Phosphorus Allocation to Leaves of Beech Saplings Reacts to Soil Phosphorus Availability, in Frontiers in Plant Science, 10, 744.
Soil phosphorus supply controls P nutrition strategies of beech forest ecosystems in Central Europe
Lang Friederiecke, Frossard Emmanuel, Bauhus Juergen, Luster Jörg, Von Wilpert Klaus (2017), Soil phosphorus supply controls P nutrition strategies of beech forest ecosystems in Central Europe, in Biogeochemistry, (1), 5-29.
Impact of anthropogenic induced nitrogen input and liming on phosphorus leaching in forest soils
Holzmann Stefan, Misson Anna, Puhlmann Heike, Siemens Jan, Bol Roland, Klumpp Erwin, Von Wilpert Klaus (2016), Impact of anthropogenic induced nitrogen input and liming on phosphorus leaching in forest soils, in Journal of Plant Nutrition and Soil Science, 179, 443-453.

Collaboration

Group / person Country
Types of collaboration
Lehrstuhl für Bodenökologie, Universität Bayreuth Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Research Unit Comparative Microbiome Analysis, Helmholtz Zentrum München Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
IUFRO 125th Anniversary Congress Talk given at a conference The ability of juvenile beech to adapt to different P availability 18.09.2017 Freiburg i.B., Germany Meller Sonia; Luster Jörg;
7th International Symposium on Physiological Processes in Roots of Woody Plants, Woody Root 7 Talk given at a conference The potential of beech seedlings to adapt to low P availability in soil – linking plant P and biomass allocation with rhizosphere processes 26.06.2017 Tartu, Estonia Luster Jörg; Meller Sonia;
European Geosciences Union General Assembly Talk given at a conference The potential of beech seedlings to adapt to low P availability in soil – plant versus microbial effects on P mobilising potential in the rhizosphere 17.04.2016 Wien, Austria Meller Sonia; Luster Jörg;
SPP 1685 Soil/Vegetation Cluster Talk given at a conference The ability of beech seedlings (Fagus Sylvatica) to shape their rhizosphere in order to cope with low P availability 08.10.2015 Freiburg i.B., Germany Meller Sonia; Luster Jörg;
SPP 1685 Microbes Cluster Talk given at a conference P mobilisation in microzones around the roots of Fagus sylvatica 10.09.2015 München, Germany Luster Jörg; Meller Sonia;
Jahrestagung der Deutschen Bodenkundlichen Gesellschaft DBG Poster The ability of beech seedlings (Fagus Sylvatica) to shape their rhizosphere in order to cope with low P availability 07.09.2015 München, Germany Meller Sonia; Luster Jörg;
SPP 1685 Annual Meeting Poster Plant-induced chemical changes in the rhizosphere of Fagus sylvatica seedlings depending on soil P speciation and tree provenance 01.07.2015 Dipperz, Germany Meller Sonia; Luster Jörg;
Rhizosphere 4 Talk given at a conference The ability of beech seedlings (Fagus Sylvatica) to shape their rhizosphere in order to cope with low P availability 22.06.2015 Maastricht, Netherlands Luster Jörg; Meller Sonia;


Abstract

1. RationaleDuring the development of forest soils phosphorus (P) commonly declines in both abundance and availability and thus becomes limiting for biological activity. Forest ecosystems adapt to this process by developing efficient P recycling mechanisms, including the formation of stable P-stores and optimized P uptake by trees. In Central Europe, this sensitive evolution is disturbed by an accelerated soil acidification driven by anthropogenic deposition. The fast decrease in P nutrition observed in various forests supports this hypothesis.2. ObjectivesThe project examines for Norway spruce and European Beech, how P uptake and mobilization efficiency increase along a soil ecological gradient ranging from “young” soils with high plant availability of P in primary minerals to “aged soils” with reduced availability of mineral P. We are further interested in i) the influence of physical and chemical boundary conditions on the efficiency of P-recycling, i.e. maintaining P availability for trees while minimizing P-leaching, and ii) how artificially accelerated acidification through nitrogen (N) fertilization or enhanced acid buffering through experimental liming will vary, or possibly disturb P uptake and mobilization efficiency. We want to assess the following competing processes i) storage / fixation of P in the soil, ii) P export with the seepage water and iii) mining of the soil P resources by the tree through interactions between roots and mycorrhizal hyphae with the mycorrhizosphere soil. All three processes display pronounced spatial heterogeneity in natural forest soils, which we aim to maintain in our experiments to such an extent that their relevance at ecosystem level can be assessed.3. Material and MethodsMesocosm experiments with soil from SPP core sites and 1 to 2 year old spruce and beech seedlings will be carried out in the greenhouse: i) changes in plant uptake and percolation loss in relation to total and labile P pools along a P depletion gradient will be assessed in naturally structured soil columns, by measuring composition and distribution of P-species in the soil, P-fluxes in the soil water, and plant P uptake. Separate treatments with and without inclusion of an organic surface layer aim at assessing the relative role of organic and mineral soil for P nutrition. The disturbance by liming and N fertilization is studied for the two extreme sites of the acid P depletion gradient. ii) The impact of aggregate structure and aeration in mineral soils on P uptake and mobilization efficiency is studied by comparing naturally structured soil from the B horizon of one acidic site with sieved soil at different matric potentials. iii) Experiments with sieved soil from the main rooting zone are carried out in rhizoboxes in order to study plant induced heterogeneity in the mycorrhizosphere in terms of acidification/alkalinisation, the occurrence of potentially P mobilizing substances, P mobilization and microbial community composition.
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