Honigeinlagerung

Der Wassergehalt des von den Pflanzen produzierten Nektars kann variieren. Um seine Konservierung in den Waben zu gewährleisten, darf er nicht gären. Deshalb wird er von den Bienen in Honig umgewandelt, indem sie seinen Wassergehalt senken und folglich den Zuckergehalt erhöhen. Dies verhindert die Entwicklung der Mikroorganismen. In der Dunkelheit des Bienenstocks ist es schwierig, den Herstellungsprozess des Honigs zu beobachten. Aus diesem Grund ist er auch nur wenig erforscht. Um die Umwandlung von Nektar in Honig zu untersuchen, haben wir die Technik der Tomographie eingesetzt. Sie ermöglicht es, den Zuckergehalt des eingelagerten Nektars sehr präzise zu messen, ohne den Bienenstock öffnen zu müssen und das Bienenvolk zu stören.

[ x ] schliessen

Bretscher D., Ammann C., Wüst C., Kupper T., Schenker S., Eggli D., Fasel F., Bock M.

Agriculture.

In: FOEN 2025: Switzerland’s Greenhouse Gas Inventory 1990–2023: National Inventory Report and reporting tables (CRT). Hrsg. Federal Office for the Environment FOEN. 2025, 262-321.

Download englisch (22913 kB)

Download englisch: Greenhouse gas inventory of Switzerland: Submission of April 2025 (PDF, 21000 kB)

Link: Greenhouse gas inventory of Switzerland: Submission of April 2025

Zusammenfassung:

Total greenhouse gas emissions from the Agriculture sector in 2023 were 6'001 kt CO2 equivalent which is a contribution of 14.7 % to the total of Swiss greenhouse gas emissions (excluding indirect CO2, excluding LULUCF). Main agricultural sources of greenhouse gases were 3A Enteric fermentation, emitting 60 % of all agricultural greenhouse gases, followed by 3D Agricultural soils with 24 % and 3B Manure management with 16 %. 3G Liming and 3H Urea application contributed 0.5 % and 0.2 % respectively. CH4 and N2O emissions generally declined from 1990 until 2004. Subsequently CH4 emissions increased slightly until 2008 and decreased again afterwards. N2O emissions remained more or less on a constant level between 2004 and 2017 and started to decrease afterwards. This general development can be explained by the development of the cattle population and the input of mineral fertilisers. Use of mineral fertiliser declined due to the introduction of the “Proof of Ecological Performance (PEP)” in the early 1990s, while the cattle population was influenced by the market situation, the milk quotation system (suspended in 2009) and the general agricultural policy- and subsidy-system. Most emission factors did not change significantly over the inventory years.

Publikations-ID (Webcode): 59256 Per E-Mail versenden

[ x ] schliessen