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
Sammendrag
Norway is the world’s largest producer of Atlantic salmon with an annual 1.5 million tons. The aquaculture sector produces large amounts of fish sludge (feces and excess feed), which has traditionally been released at sea as most salmon production operates in open cages in the fjords. In 2022, 12k tons of phosphorous and 70k tons of nitrogen were released from salmon production in Norway (Sample, 2024), thus contributing to eutrophication of the sea environment while representing substantial loss of plant nutrients. Recently, a few completely land-based salmon production facilities have been established, and the associated sludge has gained increased focus as potential substrate for anaerobic digestion (AD). While AD of freshwater fish sludge has been researched to some extent, properties of marine fish sludge (MFS) as substrate for biogas production remains poorly characterized. High saline substrates, such as MFS, are known to have pervasive effects on microbial community composition and can be inhibitory for methanogenic archaea. Continued advances in meta-omic approaches increase understanding of microbial communities and their metabolic mechanisms in a given environment. Here, we investigated the impact of MFS on continuous biogas process performance and microbial dynamics during gradually increased volume loading of MFS feedstock. AD experiments were conducted in lab-scale continuous biogas reactors (CSTRs), and the amount of MFS (in mix with cow manure) was increased from 20% volume, to 100%, with stable process at hydraulic retention time (HRT) of 28d. When loading 100% MFS, organic loading rate (OLR) was increased (by reducing HRT), from 28 to 12d, representing increased OLR from ~4 to 10 g total organic demand (tCOD)/L/d. The process functioned during the total experimental phase (400 days), with maximum salt concentration at 25 g/L (12 g/L Na+), substantially higher than reported inhibiting levels at ~8 g/L Na+ (Zhang et.al., 2020). Biogas production increased from ~200 to 400 mL/g tCOD when MFS was increased. Specific biogas production at 25 and 12 d HRT remained relatively constant, at ~450 mL biogas/g tCOD, with stable methane concentration at ~65% throughout the experiment. Through meta-omic approaches (16S rRNA and whole genome sequencing), our study aims to provide insight into recovered microbial populations and key metabolic pathways when subjected to high salinity and increased OLR. Our study further aims to shed light on important microbial processes in AD running on novel substrates such as MFS, while paving way for sustainable energy solutions, linking marine byproducts to renewable energy generation. References Sample, J. E. (2024). Kildefordelte tilførsler av nitrogen og fosfor til norske kystområder i 2022–tabeller, figurer og kart. NIVA-rapport. Zhang, J., Zhang, R., He, Q., Ji, B., Wang, H., & Yang, K. (2020). Adaptation to salinity: Response of biogas production and microbial communities in anaerobic digestion of kitchen waste to salinity stress. Journal of bioscience and bioengineering, 130(2), 173-178.
Sammendrag
Nytt forskningsprosjekt om kontroll av høymole
Forfattere
Lars Olav BrandsæterSammendrag
Om utbredelse og problemomfang, biologi og bekjempelse av høymole.
Sammendrag
presentasjon seminar
Forfattere
Linn SolliSammendrag
Seminar presentasjon
Forfattere
Sartre, Liane MoniqueSammendrag
Integrated Pest Management (IPM) has been mandatory in Norway since 2015, as a strategy to reduce pesticide use and promote more sustainable agriculture. Studies show that implementation of IPM at farm level remains context-dependent, but so far no study on Norwegian fruit farming system had yet been conducted. This thesis aims to explore how Norwegian fruit farmers understand and apply IPM principles and what factors influence their adoption. A total of nine semi-structured interviews were conducted in two major fruit regions (Hardanger and Lier). The findings show that while several IPM principles are applied, especially preventive and non chemical methods, other principles are less implemented by farmers. IPM adoption is shaped by on-farm factors including technical constraints, infrastructures, economic concerns, social interactions, health and environmental awareness, as well as factors specific to the farmer. External influences such as national and European policies, market pressures, advisory and research services, and farmers’ networks also play a major role. These findings highlight the need for context-sensitive support or the need to address novel research gaps in IPM-related studies, especially in the Norwegian fruit farming context.
Sammendrag
Ferske tal viser at granborkbilla er talrik i mange nye granområde i Vest-Noreg. Blant anna blei stor granborkbille for første gong registrert i Møre og Romsdal.
Sammendrag
Høye billefangster i indre deler av Sør-Norge er sannsynligvis en ettervirkning av stormen i november 2021. Nå skal skogbestand som er ekstra utsatt for barkbilleangrep identifiseres. Det vil gi bedre beredskap mot barkbilleskader.
Sammendrag
Kunnskap om beiteressursene er viktig. Da gjelder det å vite hvilke planter som vokser hvor. Bli med NIBIOs beitegranskere på vegetasjonskartlegging i Lesja kommune.
Sammendrag
Ny rapport viser hvilke regioner og arealtyper som egner seg for lukket hogst. Den viser også hvordan økt bruk av lukket hogst kan påvirke naturmangfoldet.