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Impacts of N/P inputs on organic P dynamics and P status in soils and plants along anutrient gradient

English title Impacts of N/P inputs on organic P dynamics and P status in soils and plants along anutrient gradient
Applicant Frossard Emmanuel
Number 171170
Funding scheme Project funding
Research institution Institut für Agrarwissenschaften ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Pedology
Start/End 01.02.2017 - 30.04.2021
Approved amount 423'290.00
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All Disciplines (2)

Discipline
Pedology
Geochemistry

Keywords (10)

Forest ecosystem; Phosphorus cycling; Organic phosphorus; Mineralization; Phosphatase genes; Radioisotopes; Oxygen isotopes in phosphate; 31P-NMR; Sequential extraction; Enzyme activity

Lay Summary (Italian)

Lead
Impacts of N/P inputs on organic P dynamics and P status in soils and plants along a nutrient gradientImpatto degli inputs di azoto e fosforo sulla dinamica del fosforo organico e lo status del fosforo nel suolo e nelle piante lungo un gradiente di biodisponibilità del fosforoImpact des inputs d’azote et phosphore sur les dynamiques du phosphore organique et le status du phosphore dans le sol et les plantes sur un gradient de biodisponibilité du phosphore
Lay summary

In sintesi

Negli ultimi decenni il ciclo del fosforo (P) negli ecosistemi forestali è stato fortemente alterato dalle attività umane, in particolare attraverso l’aumento delle deposizioni atmosferiche di azoto (N), i cambiamenti climatici o ancora l’aggiunta di fertilizzanti. Tuttavia, pochi studi fino ad ora hanno investigato l’effetto complessivo dell’aggiunta di N e P sulle varie componenti dell’ecosistema, in particolare sui pool di nutrienti del suolo, sulle comunità microbiche e sulle piante, così come gli effetti di retroazione determinati da tali inputs.

Oggetto e obiettivi

Questo progetto ha come obiettivo principale quello di studiare gli effetti dell’aggiunta di nutrienti (N e P) in forma minerale sulle varie componenti dell’ecosistema forestale temperato in foreste dominate da Fagus sylvatica (L). Attraverso un esperimento che prevede l’aggiunta di N, P e N+P in siti forestali caratterizzati da un diverso livello di fosforo biodisponibile e l’utilizzo di strumenti complementari, quali analisi molecolari, traccianti isotopici (33P e 18O) e 31P-NMR, analizzeremo:

  1. I diversi pool di P nelle piante e nel suolo,
  2. le forme molecolari del fosforo organico,
  3. le comunità microbiche che possiedono ed esprimono i geni delle fosfatasi,
  4. i flussi di fosforo nel suolo e nelle piante.

Contesto scientifico

Questo progetto fornirà preziose informazioni sulla modificazione degli ecosistemi forestali in seguito ad alterazioni antropiche, in particolare quelle determinate dai cambiamenti climatici come l’aumento delle deposizioni di azoto. Permetterà inoltre di elucidare i meccanismi che permettono un efficiente riciclo del fosforo a livello dell’ecosistema. La conoscenza di tali meccanismi è un fattore chiave per migliorare l’efficienza dell’utilizzo di questo nutriente ad esempio in agricoltura.

Direct link to Lay Summary Last update: 31.01.2017

Responsible applicant and co-applicants

Employees

Datasets

Dataset for the article "Microbial community responses to phosphorus and nitrogen inputs in the organic soil horizons of two contrasting temperate beech forests"

Author Siegenthaler, Maja
Publication date 25.02.2021
Persistent Identifier (PID) https://doi.org/10.3929/ethz-b-000466815
Repository ETH Research Collection


Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
SPP 1685 NxP Working Group Meeting Talk given at a conference Impacts of N/P inputs on Hedley P pools 14.10.2019 Hohenheim, Germany Siegenthaler Maja;
International Phosphorus Workshop IPW 9 Talk given at a conference Tracing the fate of phosphorus fertilizer into soil phosphorus pools in a temperate beech forest 08.07.2019 Zurich, Switzerland Pistocchi Chiara; Mészáros Eva; Pütz Thomas; Siegenthaler Maja; Frossard Emmanuel;
SPP 1685 Annual Meeting Talk given at a conference Carbonate soils: Hedley P pools and isotopic exchange kinetics 10.10.2018 Freiburg, Germany Siegenthaler Maja;
SPP 1685 Annual Meeting Talk given at a conference Impacts of N/P inputs on organic P dynamics and P status in soil and plants: In situ 33P/18O labelling experiment in Jülich 10.10.2018 Freiburg, Germany Pütz Thomas; Siegenthaler Maja; Mészáros Eva; Frossard Emmanuel; Pistocchi Chiara;
6th Symposium on Phosphorus in Soils and Plants Poster Effects of a short-term fertilization on biological phosphorus cycling in temperate forest soils captured by oxygen isotopic composition in phosphate 10.09.2018 Leuven, Belgium Pistocchi Chiara; Frossard Emmanuel; Siegenthaler Maja; Mészáros Eva;
6th Symposium on Phosphorus in Soils and Plants Poster Effects of a short-term fertilization on bacterial community structure in temperate forest soils 10.09.2018 Leuven, Belgium Siegenthaler Maja; Mészáros Eva; Frossard Emmanuel;
3rd Conference on Ecology of Soil Microorganisms, Natural Resources and Bioeconomy Studies Poster Microbial community changes in a short-term fertilization experiment on temperate forest soils 17.06.2018 Helsinki, Finland Mészáros Eva; Frossard Emmanuel; Siegenthaler Maja;
SPP 1685 Carbonate Soils Workshop Talk given at a conference Carbonate soils: Hedley P pools and isotopic exchange kinetics 07.05.2018 Benediktbeuern, Germany Siegenthaler Maja;


Associated projects

Number Title Start Funding scheme
194252 Can organic farming practices increase nitrogen (N) use efficiency and decrease N losses in mature tea (Camellia sinensis L. (O.) Kuntze) plantations in Sri Lanka? (Acronym N-tea) 01.08.2021 SPIRIT
203317 How to decrease phosphate (P) losses from upland crops while maintaining optimum crop yields on acid sulfate soils of the lower Mekong delta? (acronym P-ASS) 01.11.2021 Resource not found: '8595bf37-0545-46ef-8729-36f87f6b0611'

Abstract

The P cycle of some forest ecosystems has been altered by anthropogenic activities, in particular, via increasing deposition of atmospheric nitrogen (N) and climate change or addition of mineral fertilisers. However, few studies have investigated the overall effects of N and P addition on soil nutrients pools, microbial communities, plant uptake and their feedback mechanisms. In this project, included within the the SPP 1685 German priority program on Ecosystems Nutrition, we aim at investigating to which extent soil biological processes in temperate forest ecosystems are affected by mineral N and P additions and how this further translates into plant nutrition. Combining a variety of approaches, including isotopic tracers, molecular tools and 31P-NMR, we will study soil P pools transformation, P fluxes in soil and plants and microbial communities harbouring phosphatase genes in a field experiment with N and P addition.
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