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.
2026
Sammendrag
Formålet med denne rapporten var å bruke matematiske modeller for å simulere utvikling i skog med alternative skogbehandlinger og sammenlikne dem med hensyn på omfang av vindskader. Vi spesifiserte fire alternativer som verdiorientert og stabilitetsorientert rotasjonsskogbruk, bledningsskogbruk og skjøtselsbelter langs kraftlinjer. Vi kjørte simuleringen på et 30 km2 område sør for Kongsvinger. Vi brukte modellene Heureka for å simulere bestandsutvikling i 5-årsperioder over 100-år, ForestGales for å beregne kritisk vindstyrke og beregnet volum vindskade ved å kombinere dette med frekvensfordeling for vindstyrke i området. Simuleringene gav en tydelig rangering av skogbehandlingsalternativene. Bledning gav 4,5 ganger mer skadevolum enn verdiorientert skogbehandling som igjen gav tre ganger mer enn stabilitetsorientert. Langs kraftlinjene ble vindskader omtrent eliminert ved å ha skjøtselsbelter med ekstra lav utgangstetthet og sluttavvirkning ved 18 m høyde. Ved å også se på volumproduksjon i sammenlikningene ble rangeringen lite endret. Bledning gav lavest volumproduksjon og verdiorientert skogbehandling gav kun 4% høyere produksjon enn en stabilitetsorientert. Vi konkluderer med at bledning fører til mer vindskader enn rotasjonsskogbruk, og at vi i rotasjonsskogbruk kan redusere skadeomfanget med lav utgangstetthet, ingen tynning og kort omløpstid. Langs kraftledninger kan vindskader nesten elimineres ved å gå enda lenger i samme retning.
Forfattere
Kristina Bringedal Gedde Georgios Triantafyllidis Alessio Miatto Lone Ross Lizhen Huang Daniel Beat MuellerSammendrag
Abstract The building sector accounts for a significant share of global material stocks and embodied greenhouse gas emissions. Material intensity (MI), defined as construction materials per unit floor area, is a key metric for understanding resource use and environmental performance. Existing approaches estimate MI for specific building types and cohorts but rarely explore additional factors that influence the structural element requirements. This study refines traditional methods by incorporating building geometry, number of floors, geographical context, construction methods, and regulatory changes, using Norwegian residential buildings as a case study. We focus on stud use in exterior walls to understand how their MI (kg/m 2 ) varies across buildings. Our correlation analysis reveals that construction year (ρ = 0.69) and energy efficiency standards (ρ = 0.51) are associated with higher MI of studs while building length shows a notable negative correlation (ρ = –0.38). Timber stud MI increases with footprint complexity and number of floors but decreases as building length and floor area grow. Snow load further contributes to increased stud MI. Studs' MI also varies across periods, reflecting changes in regulations and construction practices. These findings enhance our understanding of material use drivers in timber structures and provide a foundation for developing more nuanced building stock models to improve resource efficiency assessments and support targeted climate mitigation strategies.
Forfattere
Thomas Holm Carlsen Elisabeth Nesheim-Hauge Gunnar Kristiansen Amanda Andersen Kolbjørn Baadshaug Tone PersonSammendrag
NIBIO har i samarbeid med Natur og Samfunn AS kartlagt naturtyper og arter i seks verneområder i Nordland i 2025 etter kartleggingsmetodikken Natur i Norge (NiN). Rapporten oppsummerer og supplerer forhold som ikke fremkommer fra kartobjekter og egenskapsdata som har blitt registrert og rapportert via NiNapp. Rapporten inneholder generelle faglige vurderinger, eventuelle observerte forvaltningsrelevante problemstillinger, praktiske utfordringer i felt, eventuell usikkerhet knyttet til kartleggingsenheter og viser noen utvalgte bilder for verneområdene.
Sammendrag
Artikkelen presenterer en sammenligning av potetavling og jord- og potetkvalitet fra dyrkingssystemforsøkene på Apelsvoll, der det i 31 år har vært sammenlignbare dyrkingssystemer med potet i omløpet
Sammendrag
Fagansvar for tema skogbiologi (>100 artikler) som gir informasjon om skog, skogtyper, skogbruk og skogens biologi til skoleelever, studenter og befolkningen generelt.
Sammendrag
Produksjon, omsetning og forbruk av eple har endra seg mykje over tid. Forbruk av eple har vore fallande, medan produksjonen av norske eple har auka. I denne rapporten er det sett på utvikling i produksjon og marknad for norske eple og kva strategiar som er nytta for å auke norsk produksjon av eple. Det er også tatt med resultat frå ulike forskingstema i Greenroad-prosjektet som omfattar eple for å nå det overordna målet om auka produksjon og forbruk av norske eple.
Forfattere
Nicole P. Anderson Thomas G. Chastain Jing ZhouSammendrag
Abstract Seed moisture content (SMC) is the most reliable indicator of seed maturity and the optimal harvest timing in grass seed crops. Current SMC testing methodologies used in grass seed crops are slow or inaccurate, making it difficult to make timely harvest decisions. Harvesting too early can result in low seed weight and poor seed germination. Delaying harvest past the point of physiological maturity reduces seed yield by increasing losses due to shattering. Our objective was to validate the feasibility of using portable near‐infrared reflectance spectroscopy (NIRS) as a field‐based alternative to the oven method for determining SMC in cool‐season grass seed crops. Eight cool‐season grass species were used in field testing of the portable NIRS sensor over eight harvest seasons. Daily testing of SMC began when grass seed crops were at Biologische Bundesanstalt, Bundessortenamt and Chemische Industrie (BBCH) growth stage 69 and continued until windrowing. Seed samples were collected from each crop by cutting ∼40 inflorescences, then stripping the seeds into airtight containers until ready for estimation of SMC with a portable NIRS sensor, using SMC measurement by laboratory air‐oven (130°C) as the reference method. The SMC estimates made by the portable NIRS sensor were predictive of the actual SMC determined by the oven reference method across all eight grass species. These SMC predictions by the sensor closely followed the seasonal loss of SMC as the seed matured. Spring agronomic practices (mowing, plant growth regulators, foliar fungicides, and nitrogen fertilization) did not influence NIRS predictions of SMC compared with untreated controls. The portable NIRS sensor is a promising tool for determining harvest timing in grass seed crops by using predicted SMC values.
Forfattere
Aline Roma Tomaz Rattan Lal William Ramos da Silva Thiago Inagaki Aline dos Santos Correia Felipe José Cury Fracetto Giselle Gomes Monteiro Fracetto Clever Briedis Débora Marcondes Bastos Pereira Milori Abelardo Antônio de Assunção Montenegro Ademir de Oliveira FerreiraSammendrag
In semiarid regions, soil organic carbon (SOC) stocks and soil organic matter (SOM) pools are often low due to limited biomass input and inadequate management. This study evaluated SOC stocks and SOM fractions in a forage cactus–sorghum intercropping system irrigated with treated sewage water under diverse mulch in the northeastern Brazilian semiarid. The experiment followed a randomized split-plot block design with four replicates. Main plots included four irrigation levels (0, 80, 100, and 120 % of sorghum evapotranspiration (ETc)), and split plots comprised two mulch treatments: no mulch (NM) and mulch (WM) with 8 Mg ha−1 of sabi grass, spiny burrgrass, and goosegrass. Soil samples were collected at 0–0.10, 0.10–0.20, and 0.20–0.40 m depths in three sorghum cuts to determine labile SOM fractions: hot water-extractable C (HWEO-C), potassium permanganate-oxidizable C (POX-C), and particulate organic C (POC). In addition, SOC stocks and humic substances (HS), including humin (HU), fulvic acid (FA), and humic acid (HA), were determined at the end of the experiment. Intercropping system productivity was also evaluated. The highest SOC, POC, POX-C, and HWEO-C stocks occurred in 80WM and 100WM treatments, especially in HS, with HU as the dominant component. SOC in the HU fraction exceeded that in native vegetation soils, with threefold increases at 0–0.10 m and six-to sevenfold increases in deeper layers. Soils without irrigation, regardless of mulch, exhibited lower C storage, underscoring the importance of water management. Combining reclaimed water irrigation and mulching enhanced SOC accumulation, particularly in stable humic fractions, boosted carbon sequestration and crop productivity, and fostered sustainable, climate-resilient agriculture in semiarid tropical regions.
Sammendrag
Abstract Background and Aims Efficient phosphorus (P) and management is essential for sustainable arable systems. Cover crops (CCs) are promising, but their performance is uncertain in high-latitudes. This three-year study evaluated CCs’ effects on P dynamics in a P-rich soil undersown in barley in Mid-Norway (63.9°N)—one of the northernmost trials of its kind. Methods A randomized complete block design included three CC treatments: ryegrass (CC1), a ryegrass–clover mix (CC2), and a four species mix including grass, legumes and herbs (CC3), and controls without CC (with/without NPK fertilizer). Soil and plant analyses included total and available P, total N, potentially mineralizable N (PMN), pH, permanganate-oxidizable carbon, root biomass, plant P concentrations, and microbial abundance via qPCR. Statistical analysis was based on Linear Mixed Models (LMMs). Results Cover crops successfully established (average biomass: 1525 kg ha⁻ 1 ), accumulated ~ 7 kg P ha⁻ 1 , and did not reduce barley yields. LMMs showed significant effects of CC treatment on root biomass, total P, and bacteria. Pairwise comparisons also revealed that fungal abundances in CC1 and CC3 were significantly higher than in the unfertilized control. Pairwise regression revealed that soil total P was strongly predicted by root biomass (β = 1.37, P < 0.001). Available P was negatively controlled by microbial pools (Bacteria: β = -9.22, P < 0.001) and residue quality (C:P ratio: β = -0.36, P < 0.001). Conclusions CCs can be used at 63°N without yield penalty. The primary P mechanism is mass-driven sequestration (root biomass) into the stable total P pool. However, P availability is temporally constrained by residue quality and microbial competition. Graphical Abstract
Sammendrag
Fagansvar for tema skogbiologi (>100 artikler) som gir informasjon om skog, skogtyper, skogbruk og skogens biologi til skoleelever, studenter og befolkningen generelt.