Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2025
Abstract
Recycling nutrients and organic matter available as waste in urban areas may close nutrient gaps and improve soil quality, but the concentrations of potentially toxic elements (PTEs) are commonly higher than in mineral fertilisers. How quickly may the limits for soil quality be exceeded, and for which elements, if such materials are applied intensively? For a rough answer to this question, we used soil data from ten case farms near Oslo and Bergen (Norway) to estimate how PTE concentrations increased when the demand for nitrogen (N), phosphorus (P) and potassium (K) in a theoretical carrot crop produced every year was covered by compost or digestate from source-separated food waste, or composted garden waste, compared with manure from horses and poultry which are often kept in peri-urban areas. With the intensive fertilisation assumed here, the Norwegian soil quality limits for PTEs were reached within 20–85 years, and faster for soil with more organic matter since regulatory limits set by weight discriminate soils with low bulk density. The limits were reached first for Cu and Zn, which are both essential micronutrients for crop plants. The concentrations of macronutrients in the urban waste-based fertilisers were not well balanced. Rates covering the K demand would lead to high surpluses of P and N. In peri-urban vegetable growing, high applications of compost are not unusual, but more balanced fertilisation is required. The Norwegian regulations for PTEs in organic soil amendments and agricultural soil are stricter than in the EU, and do not support recycling of organic matter and nutrients from urban waste. Many materials which can only be applied with restricted amounts to Norwegian agricultural soil, may be applied according to crop demand in the EU. Growers utilising urban waste-based fertilisers intensively should monitor the soil regularly, including PTE analyses. Soil sampling should occur on fixed sampling points to reveal changes in concentrations over time. Norwegian authorities should consider a revision of the organic fertiliser regulation to support recycling of valuable organic materials. There is a need for more data on the PTE concentrations in agricultural soil and organic fertiliser materials.
Abstract
Sommaren 2023 kartla NIBIO eit utmarksareal på 49 km2 kring Hevjanåsen. Dette utgjer eit av to område på til saman 149 km2 som er kartlagt i Ål kommune over ein toårsperiode. Resultata viser at utmarka på Hevjanåsen har store areal med godt beite.
Abstract
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Abstract
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Authors
Ingrid Vesterdal Tjessem Anders Bryn Peter Horvath Adam Eindride Naas Rune Halvorsen Terje Koren Berntsen Kerstin Potthoff Ketil Isaksen Ole Einar Ellingbø Tveito Ida Marielle MiennaAbstract
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Abstract
Det er ikke registrert sammendrag
Abstract
Med utgangspunkt i data for nåværende arealbruk, mjølkekvoter og bruksstruktur i seks eksempelkommuner, er det diskutert om tilgangen på grovfôrareal vil begrense produksjon og bruk av mer og bedre grovfôr i mjølkeproduksjonen. Statistikk for kjøp og salg av grovfôr på mjølkebruk er også trukket inn i drøftinga. Konklusjonen er at det vil bli vanskelig å øke andelen og/eller fordøyeligheten av grovfôr i rasjonen til norske mjølkekyr gjennom å øke det lokale grovfôrarealet per dyr eller mengde mjølk. Med dagens produksjonsvolum, bruksstruktur, avdrått og sannsynlige utvikling i denne, vil mer og bedre grovfôr måtte produseres ved å ta større energiavlinger per arealenhet.
Authors
Ingrid Vesterdal Tjessem Peter Horvath Inger Kristine Følling Volden Adam Eindride Naas Michal Torma Anders BrynAbstract
The global climate is warming, especially in northern regions due to high-latitude amplification. This high-latitude warming leads to range expansion with advancing tree- and forest-lines (TFLs) in the Northern Hemisphere. However, empirical studies can rarely provide a well-documented elevational expansion rate, especially for timescales longer than 40–50 years. This study provides a unique long-term dataset on TFL dynamics of Betula pubescens subsp. czerepanovii in Norway, based on a combination of resampled historical data (n = 319) and new field registrations (n = 447). Our dataset includes a total of 766 registrations from five counties in Norway. In total, the dataset contains 439 treelines and 327 forest lines, most likely representing the highest recorded TFLs for the region at the given time. For all data, both resampled and new, locality, coordinates, elevation, aspect and spatial uncertainty and the resampling/sampling methods and definitions are provided. The entire material is stored and available for download through the Global Biodiversity Information Facility (GBIF) portal. This dataset includes newly-resampled TFLs, based on 57–127-year-old registrations. The entries provide elevational changes, georeferenced localities and potential sites for monitoring climate change effects. The entries enable regional analyses of TFL dynamics on intermediate timescales, including the effect of time lags. The material is available for modelling TFL range shifts along the boreal-alpine ecotone. This dataset most likely provides the highest registered Betula pubescens subsp. czerepanovii locations within their specific regions, thus representing the contemporary ecophysiological range limits for the life-form tree. Additional high-elevation TFL sites and localities have been added to make the material suitable for future remapping and monitoring of climatic TFL dynamics.
Abstract
Dyrking og sanking i byen kan øke matsikkerhet og selvforsyning under kriser. I Ukraina er urbant landbruk både beredskap og motstandsarbeid.
Authors
Adam Eindride Naas Trond Simensen Lasse Torben Keetz Ingrid Vesterdal Tjessem Anders Bryn Rune Halvorsen Peter Horvath Ida Marielle Mienna Olav Skarpaas Joachim Paul Töpper Vigdis Vandvik Liv Guri Velle Catharina Caspara VloonAbstract
Det er ikke registrert sammendrag