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
The primary benefits of turfgrass sod include rapid greenery and soil coverage, but its production causes concerns about soil losses at production sites. Soil adheres to the grass root system during harvesting and is removed from the sod farm, which in the long run might lead to soil degradation on the sod farm. In this study, we investigated sod thickness and the removal of organic and mineral matter when harvesting 24 fields representing 12 Norwegian sod farms in 2022 and 2023. On each field, 10 sod strips were randomly chosen, and five sod plugs were collected from each strip. Sod thickness was measured using a sliding gauge. Sod mineral matter (SMM: soil and thatch mineral matter) and sod organic matter (SOM: soil and thatch organic matter) contents were quantified by loss on ignition at 550°C. Management and field properties were also documented. Results showed an average amount of mineral matter in the sod strips of 36 Mg ha −1 for all fields but with significant variation among fields ( p < 0.001). The average SOM content was 10 Mg ha −1 . Mean sod thickness was 15.4 mm and had a strong correlation with SOM ( r = 0.8) but only a moderate correlation with SMM ( r = 0.6). Soil water content and surface hardness at harvest affected sod thickness and SMM only slightly. Sod harvesters with twin heads harvested significantly thicker sod strips and removed more mineral matter than harvesters with single cutting heads. Soil texture did not have a significant impact on sod thickness or mineral matter removal.
Authors
Aasim M. Ali Are Sæle Bruvold Astrid Solvåg Nesse Charlotte L. Nakken Roland Peter Kallenborn Monica Sanden Christopher P. Higgins Stig ValdersnesAbstract
To achieve a circular bioeconomy, nutrients within residues such as food waste (FW) and sewage sludge (SS) must be recycled to e.g., food production. However, these biowastes often contain numerous contaminants which are recycled alongside the nutrients. Identifying these contaminants is crucial to prevent potential harmful effects when residues from circular processes, including biogas digestates, are utilized as fertilizers or soil amendments in agriculture. In this study, suspect and nontarget screening was used to comprehensively assess contaminants of emerging concern (CECs) and their transformation products (TPs) in biogas digestates derived from FW and SS. A total of 133 CECs and five TPs were tentatively identified, including 61 pharmaceuticals and personal care products (PPCPs), eight pesticides, and 64 industrial chemicals, with 44 of these CECs confirmed using analytical standards. Concentrations ranged from low μg kg−1 dry matter (DM) to several hundred mg kg−1 DM. SS based digestates were found to be more heavily contaminated with industrial chemicals and PPCPs, while FW based digestates contained higher levels of pesticides. These findings highlight the importance of stringent contaminant surveillance to ensure the safe agricultural application of biogas digestates and to mitigate potential risks associated with the recycling of organic residues.
Authors
Katherine Mary Dunlop André Frainer Karl Øystein Gjelland Bror Mathias Bonde Antii Eloranta Rune Muladal Jenny Lovisa Alexandra Jensen Hallvard JensenAbstract
Get ready for the 2025 pink salmon run when locals and fishing associations will trap as many pink salmon as possible before they enter northern Norway’s rivers! The media will be out in force too, describing how pink salmon threaten northern coastal ecosystems. But how much do we really know?
Authors
Robert BarneveldAbstract
Introduction abou the terrain, possibilities for water retention and land use in the catchment area. Presentation about modelling in general, the used hydrological model and its results according to four scenarios.
Authors
Robert BarneveldAbstract
Det er ikke registrert sammendrag
Authors
Robert BarneveldAbstract
Peat soils have been the subject of human interest for many centuries. Extraction of turf for fuel and drainage for cultivation are centuries old economic activities that have altered the environment of peat-rich landscapes. In Norway, the drainage of peat soils is mainly associated with cultivation and with attempts to facilitate wood production. The purpose of drainage is lowering the water table and thus creating favourable conditions for root development and trafficability. The shift from anaerobic to aerobic conditions causes organic material to decompose; a process that produces CO2. This process can be stopped only by restoring the water table to its original level. Peat restauration is commonly carried out by blocking or filling the open drainage ditches. The effect of restauration on the hydrology of the individual peat bog and the associated landscape is not well understood. It is the domain of contrast: hydrological connectivity is reduced, but the available pore space (for infiltration) is also reduced. The question of how peat restoration affects landscapes' ability to retain overland flow and prevent flooding downstream has yet to explored fully. Since empirical data are hard to come by, process simulation is one of the few viable options for the evaluation of peat restauration. A raster-based rainfall-runoff model is presented that approaches soil water content dynamically but not fully process-explicit. Typical raster cell dimensions are 10m, allowing for daily timesteps and basins of several hundreds of square kilometres. In the runoff phase, water is distributed instantaneously and routed through the landscape from source to river. Processes that were deemed crucial for process representativeness were included by means of simple approximations. These include snow accumulation and melt, groundwater contribution to base flow, tile drainage and lake water levels. Due to the simple, mass balance driven, groundwater level simulations of the model, the effect of restauration on runoff generation and transmissivity can be approximated. Its spatial explicitness allows for the parameterisation of individual peat restoration projects, and for the assessment of their effects at the local and catchment scales. At present, no measurements are available that can confirm or reject all of the model's results. But due to its modular structure, the model's ability to mimic moments in the hydrological cycle can be tested and improved with measurements of a variety of parameters. Due to its spatially explicit nature, the effects of peat restauration of individual bogs or broader strategies can be explored. Not only does the model provide hydrographs at points of interest, it also shows how groundwater levels changes after restauration and how peat bogs affect the wetness of neighbouring areas. The readily available geospatial data in Norway (soil, land use, terrain, etc.) in combination with the computing power of an off-the-shelf laptop computer allow for a process-based approach to landscape scale process simulation.
Abstract
In this presentation, results from field measurements on reduced tillage strategies are shown. The results of these measurements are used to change parameters in process based erosion model. Reductions in soil loss are presented at the plot and headwater catchment scale.
Abstract
Landsorter av korn utgjør en verdifull ressurs i arbeidet for et mer bærekraftig og motstandsdyktig landbruk. Med sitt brede genetiske mangfold og evne til lokal tilpasning kan de både gi agronomiske og økonomiske fordeler – særlig innen økologisk landbruk. Likevel er det få bønder som velger å dyrke landsorter og andre tradisjonelle kornsorter. En ny studie kaster lys over hva som motiverer Norske bønder til å dyrke landsorter og peker på konkrete tiltak for å kunne utnytte disse ressursene bedre.
Abstract
Hvordan kan man klare å produsere mest mulig biogass og samtidig sikre en biorest av upåklagelig kvalitet?
Authors
Astrid Solvåg NesseAbstract
Det er ikke registrert sammendrag