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.
2020
Sammendrag
Etter oppdrag fra Statens vegvesen og prosjektet E18 Lysaker-Ramstadsletta har NIBIO utarbeidet et overvåkingsprogram for resipienter og anleggsvann. Overvåkingsprogrammet er utarbeidet med bakgrunn i gjennomførte forundersøkelser av vassdrag og marine resipienter og i henhold til normale krav til overvåking ved bygging og drift av ny veg. Kravene gitt i tslippstillatelsen fra Fylkesmannen er innarbeidet og ivaretatt, og det samme gjelder normale krav til påslipp på spillvannsnettet der VEAS og kommunen er påslippsmyndighet.
Forfattere
Yvonne Rognan Roger Roseth Johanna Skrutvold Øistein Johansen Kristine Våge Ole Roer Sigbjørn RolandsenSammendrag
Rapporten sammenfatter alle resultater for undersøkte vannforekomster og stasjoner langs ny E18 Rugtvedt – Dørdal, både før og under anlegg i perioden 2016 – 2019. Presenterte resultater omfatter biologiske kvalitetselementer, vannanalyser og automatisk overvåking av vannkvalitet. Resultatene har blitt klassifisert og vurdert i henhold til Direktoratgruppen for vannforskriftens Veileder 02:2018. Klassifisering av økologisk tilstand har blitt gjort ut fra indekser for biologiske kvalitetselementer og kjemisk tilstand har blitt vurdert etter typifisering og klassifisering basert på årlige middelverdier for vannkjemi....
Forfattere
Paul Eric AspholmSammendrag
Det er ikke registrert sammendrag
Forfattere
Xinbing Wang Yuxin Miao Rui Dong Zhichao Chen Krzysztof Kusnierek Guohua Mi David J. MullaSammendrag
The dynamic interactions between soil, weather and crop management have considerable influences on crop yield within a region, and should be considered in optimizing nitrogen (N) management. The objectives of this study were to determine the influence of soil type, weather conditions and planting density on economic optimal N rate (EONR), and to evaluate the potential benefits of site-specific N management strategies for maize production. The experiments were conducted in two soil types (black and aeolian sandy soils) from 2015 to 2017, involving different N rates (0 to 300 kg ha−1) with three planting densities (55,000, 70,000, and 85,000 plant ha−1) in Northeast China. The results showed that the average EONR was higher in black soil (265 kg ha−1) than in aeolian sandy soil (186 kg ha−1). Conversely, EONR showed higher variability in aeolian sandy soil (coefficient of variation (CV) = 30%) than in black soil (CV = 10%) across different weather conditions and planting densities. Compared with farmer N rate (FNR), applying soil-specific EONR (SS-EONR), soil- and year-specific EONR (SYS-EONR) and soil-, year-, and planting density-specific EONR (SYDS-EONR) would significantly reduce N rate by 25%, 30% and 38%, increase net return (NR) by 155 $ ha−1, 176 $ ha−1, and 163 $ ha−1, and improve N use efficiency (NUE) by 37–42%, 52%, and 67–71% across site-years, respectively. Compared with regional optimal N rate (RONR), applying SS-EONR, SYS-EONR and SYDS-EONR would significantly reduce N application rate by 6%, 12%, and 22%, while increasing NUE by 7–8%, 16–19% and 28–34% without significantly affecting yield or NR, respectively. It is concluded that soil-specific N management has the potential to improve maize NUE compared with both farmer practice and regional optimal N management in Northeast China, especially when each year’s weather condition and planting density information is also considered. More studies are needed to develop practical in-season soil (site)-specific N management strategies using crop sensing and modeling technologies to better account for soil, weather and planting density variation under diverse on-farm conditions.
Forfattere
Habtamu AlemSammendrag
The objective of this paper is to examine the economic performance of crop-producing farms accounting for unobserved heterogeneity,environmental variables, and regions. The empirical analysis was based on a translog cost function and unbalanced farm-level panel data for 1991–2013 from the 455 crop-producing farms with 3,885 observations (1,004observations from the central region and 2,881 observations from the eastern region). We found that the mean minimum costs were about 93% and 92% of the actual costs for crop farms in the central and eastern regions, respectively.The marginal effects of crop rotation, land tenure, off-farm activity, direct government support, and experience were positively associated with crop farm economic performance. The marginal contribution of these variables on economic performance increased in the years 2000–2013 compared with the years 1991–1999 in both regions.
Forfattere
Paul Eric AspholmSammendrag
Det er ikke registrert sammendrag
Sammendrag
Remediation using nanoparticles depends on proper documentation of safety aspects, one of which is their ecotoxicology. Ecotoxicology of nanoparticles has some special features: while traditional ecotoxicology aims at measuring possible negative effects of more or less soluble chemicals or dissolved elements, nanoecotoxicology aims at measuring the toxicity of particles, and its main focus is on effects that are unique to nano-sized particles, as compared to larger particles or solutes. One of the main challenges when testing the ecotoxicity of nanoparticles lies in maintaining stable and reproducible exposure conditions, and adapt these to selected test organisms and endpoints. Another challenge is to use test media that are relevant to the matrices to be treated. Testing of nanoparticles used for remediation, particularly red-ox-active Fe-based nanoparticles, should also make sure to exclude confounding effects of altered red-ox potential which are not nanoparticle-specific. Yet another unique aspect of nanoparticles used for remediation is considerations of ageing of nanoparticles in soil or water, leading to reduced toxicity over field-relevant time scales. This review discusses these and other aspects of how to design and interpret appropriate tests and use these in hazard descriptions for subsequent risk assessments.
Forfattere
Hilde Karine WamSammendrag
In this educational tool kit, your pupils will learn about the amazing and sometimes odd ways animals have adapted to living, especially in polar extreme environments. This is part 1 of a series of three tool kits on the topic. Part 1 gives an introduction and explains principles of evolutionary adaptations in view of climate change. Part 2 is about animals in the taiga, while part 3 is about animals on the tundra.
Forfattere
Hilde Karine WamSammendrag
In this educational tool kit, your pupils will learn about why and where there is a region called Fennoscandia. We explore cultures for the outdoors that are shared between all the countries of the region. In role play, pupils will explore how one, by learning about another’s culture, one can more easily accept it even when one does not like it.
Forfattere
Hilde Karine WamSammendrag
Do you know what happens when an exotic species comes to a new place, where it does not belong? Can the planet be completely invaded by exotic species? What exactly is an exotic species? In this learning package, we look at how invasive species are a growing problem and how they can affect the environment, other species and even the entire global bioeconomy.