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
Forfattere
Kristian Hansen Benedikte Watne Oliver Zahra Bitarafan Inger Sundheim Fløistad Christian Andreasen Lars Olav BrandsæterSammendrag
Background: Giant hogweed (Heracleum mantegazzianum Sommier and Levier) is a perennial herbaceous plant that can grow to a height of 2-5 m. A single flowering plant can produce more than 20,000 seeds. It is one of Europe’s most widespread and problematic invasive alien species and a severe threat to native biodiversity. Glyphosate is widely used to control H. mantegazzianum. Decades of intensive herbicide spraying have led to environmental pollution, prompting a need to explore new methods to supplement or replace glyphosate. Objective: Non-chemical methods to control H. mantegazzianum were tested and compared with glyphosate application. Methods: In two infested locations in southeast Norway, we compared the efficacy of glyphosate applications with a combination of mechanical cutting of the flowering stem of H. mantegazzianum and hot water treatment (80 °C). Hot water or glyphosate was supplied by foliar application or injection into the root crown. Results: The best method to reduce cover and the number of H. mantegazzianum rosettes and seedlings was achieved with two foliar applications of glyphosate. Cutting the flowering stem and injecting hot water into the root crown was almost as efficient as glyphosate application. Cutting and foliar applications of hot water had the weakest efficacy. Despite the best control and significant growth of grasses after glyphosate treatment, relatively high percentage of bare soil remained in the plots afterwards, increasing the risk of erosion. Conclusions: Cutting and injection of hot water in the root crown may be a viable alternative to glyphosate application in areas where herbicides are undesirable.
Sammendrag
Rapporten presenterer resultater fra forsøk med planting av furu. Tradisjonelt har furu forynget seg naturlig, men interessen for planting har økt. Planting er aktuelt for å oppnå bedre vekst ved bruk av foredlet frø og for å gjennomføre treslagsskifte eller barblandingsfelt. Våren har vært anbefalt plantetidspunkt for furu, men høstplanting er også praktisert med varierende resultater. Prosjektets hovedmål var å undersøke om tidlig kortdagsbehandling (KD-behandling) av furuplanter, som gir fysiologisk mer modne planter med nåler i knippe (“dobbeltbar”), kan øke overlevelsen, i kombinasjon med optimalt plantetidspunkt om høsten. Plantetidspunkt påvirket ikke høyde, men tidlig høstplanting ga større diameter og lavere avgang enn planting seinere på høsten. KD-behandlede planter var høyere og hadde større diameter etter to vekstsesonger, men KD-behandling påvirket ikke overlevelsen. Det var store forskjeller i vekst og overlevelse mellom de tre forsøksfeltene. Beiting var den største enkeltårsaken til avgang i plantefeltene. Prosjektet ble initiert av Glommen Mjøsen Skog AS og finansiert av Utviklingsfondet for skogbruk og Skogtiltaksfondet, med feltforsøk etablert i Stange kommune i 2022 og oppfølging fram til 2024.
Forfattere
Tor MykingSammendrag
Det er ikke registrert sammendrag
Forfattere
Todora Rogelja Laura Secco Francoise Lefevre Egbert Beuker Marjana Westergren Bruno Fady Santiago C. González-Martínez Tor Myking Luc E. Pâques Christian Rellstab Giuseppe Giovanni Vendramin Thibaud Chauvin Marcela van Loo Ulla Ovaska Jacopo Giacomoni Anže Japelj Anna-Maria Farsakoglou Heino Konrad Sofia Caiolo Aurore Desgroux D. E. Kjær Jo Van Brusselen Mauro MasieroSammendrag
Kartlegging av sentrale aktører i forvaltningen av trærnes genressurser
Sammendrag
Det er ikke registrert sammendrag
Forfattere
David Chludil Curt Almqvist Mats Berlin Arne Steffenrem Steven E. McKeand Jiří Korecký Jan Stejskal Jaroslav Čepl Fikret Isik Debojyoti Chakraborty Silvio Schueler Torsten Pook Christi Sagariya Milan LstibůrekSammendrag
Det er ikke registrert sammendrag
Sammendrag
For establishment and growth of newly planted seedlings it is essential to overcome environmental stress at the planting site. Adding the amino acid arginine at planting is a novel treatment aiming at increased establishment success, so far tested in a limited number of applied studies. We examined the effects of adding arginine-phosphate (arGrow®), mechanical site preparation (MSP), and planting time on survival and growth of Norway spruce and Scots pine seedlings in two field experiments in boreal southeastern Norway. After three growing seasons, survival for spring planted seedlings of both species was significantly better following MSP, while addition of arginine-phosphate did not have any effect. Autumn planted pine seedlings with MSP and arginine had higher survival and also larger diameter than spring planted ones with MSP but without arginine. Spruce and pine seedlings with MSP were taller and had larger diameter than those without MSP. For spring planted seedlings of both species, dry weight of roots and shoots was positively affected by MSP, but not by arginine. To conclude, arginine-phosphate had neutral to modestly positive effects on survival and growth, while MSP had clear positive effects. The effect of planting time varied with species.
Forfattere
Zahra Bitarafan Wiktoria Kaczmarek-Derda Therese With Berge Inger Sundheim Fløistad Christian AndreasenSammendrag
Det er ikke registrert sammendrag
Forfattere
Katri Kärkkäinen Sonja T. Kujala Rosario Garcia-Gil Arne Steffenrem Johan Sonesson Liina Hoikkala Harri Mäkinen Sauli ValkonenSammendrag
• Genetic effects of continuous cover forestry (CCF) are not well known. We need more research, especially on the genetics of spruce-dominated CCF sites. Levels of relatedness are of interest, as are estimates of safe limits for the intensity and duration of CCF practices that secure genetic potential for good growth and quality. • With even-aged forestry, genetically improved regeneration material can be used to mitigate climate change-related risks through breeding and deployment recommendations. In CCF, currently based on natural regeneration, we assume that enough seedlings establish, and that sites contain enough genetic variation to enable natural selection and evolutionary processes. • Based on research in other regions, the number of reproducing trees must be kept large to avoid excessive levels of relatedness and inbreeding and to maintain sufficient levels of genetic diversity. • In some well-documented long-term experiments in other regions, intensive high-grading has led to slower growth rates, which could partly be due to genetic degradation of the stand. If contemporary recommendations for selection cutting are followed, negative genetic effects should be unlikely.
Sammendrag
Det er ikke registrert sammendrag