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Nachhaltig produzierte Wasserlinsen als mögliche neue Proteinquelle für die Schweizer Tierernährung am Beispiel der Aquakultur

Original titleNachhaltig produzierte Wasserlinsen als mögliche neue Proteinquelle für die Schweizer Tierernährung am Beispiel der Aquakultur
Abstract

Switzerland has a low self-coverage ratio of protein-rich feed and most of it is imported from abroad. In a master thesis, it was shown that duckweed from the family of Lemnaceae could have a high protein content, when grown on diluted cow slurry, with high growth and area production rates that are many times higher than those of all known terrestrial production systems. Furthermore, the harvested duckweed has been successfully used as a feed ingredient for rainbow trout larvae. Harvesting duckweed, however, is very time-consuming and has to be done on a frequent basis, which leads to the need of an automated harvesting method for Switzerland.

The aim of the project is to evaluate whether technologically low-cost and inexpensive facilities can be used to produce duckweed of sufficient quality as a protein source for fish nutrition in Switzerland.

Detailed Description

Das Projekt wird in einem umfangreichen Ansatz klären, welche Produktionseffizienz (Flächenproduktivität und Nährstoffgehalte der Wasserlinsen sowie der dafür benötigte Energieverbrauch) in einfachen Kreislaufanlagen erreicht werden kann, sowie die Biosicherheit des Produktes untersuchen. Die produzierten Wasserlinsen werden in Futtermittel eingemischt, extrudiert und an Brut und Mastfische kommerziell wichtiger Vertreter der Salmoniden, Perciden und Cypriniden verfüttert und deren Produktionsperformance untersucht. Abschliessend wird die Betriebswirtschaftlichkeit einer möglichen Wasserlinsenproduktion unter den getesteten Bedingungen berechnet.

Financing/ Donor
  • Federal Office for Agriculture (FOAG)
(Research) Program
  • Federal Office for Agriculture (FOAG) – Research, training and innovation
Project partners
  • ZHAW Zurich University of Applied Sciences in Wädenswil, Institute of Natural Resource Sciences
  • Dr Constanze Pietsch-Schmied, leader of the Fish Welfare Group
  • Fridolin Tschudi, leader of the Recirculating Aquaculture Group
FiBL project leader/ contact
FiBL project staff
  • Stolze Mathias (Support unit of the Executive Committee)
  • Weiner Mareike (Department of Food System Sciences)
(people who are not linked are former FiBL employees)
Role of FiBL

Project coordination

Leading work package 1, 5 and 7

Cooperation with ZHAW in work package 3 and 8

FiBL project number 50094
Date modified 12.02.2020
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