The intensification of agricultural practices has led to an alarming decline in farmland biodiversity. With the aim of stopping and even reversing this trend, biodiversity promotion areas (BPA – formerly named «ecological compensation areas») were introduced in the 1990s. In this study, the influence of BPA on the biodiversity of butterflies and breeding birds was investigated in 46 landscape squares of 1 km2. If the proportion of BPA in the landscape increased from 5 % to 15 %, the butterfly species richness increased by 22 % and that of birds by 10 %. In the case of birds, farmland and AEO (agriculture-related environmental objectives) priority species primarily benefited from BPA with high ecological quality, though these were rare in most landscapes. For both taxonomic groups, the proportion and quality of BPA habitats was more important than their spatial configuration, including the distances between them. Our study at the landscape scale illustrates the important role of biodiversity promotion areas and highlights their positive effect on biodiversity in the intensively farmed Swiss agricultural landscape.
A comparison of different methods of winter-wheat fertilisation with nitrogen showed that nitrogen surpluses can be significantly reduced by means of site-specific variable-rate nitrogen fertilisation.
Fabian Y., Roberti G., Jacot K., Gramlich A., Benz R., Szerencsits E., Churko G., Prasuhn V., Leifeld J., Zorn A., Walter T. (ꝉ), Herzog F.
Many tile drainage systems on arable land are in need of renewal. Cantons and stakeholders will now be given a decision-making tool enabling them to assess such areas in detail and to find sustainable solutions.
Ammonia emissions from the Swiss farming sector have scarcely declined over the past 20 years. This is because the factors leading to either an increase or decrease in emissions have for the most part cancelled each other out between 2000 and 2020.