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.
2011
Sammendrag
To flisstørrelser (2,5 og 5 cm) med og uten innblanding av torv (20 % av flisvolum, fig. 2, 3) ble prøvd som tallemateriale for sau og kjøttfé vinteren 2008/2009. resulterte halmtallen i reinere søyer og mer hvile fordi halmen hadde bedre oppsugingsevne enn den grove flisa. Flisstørrelse og innblanding av torv hadde liten betydning for reinhetsgrad og liggeatferd hos kjøttfé og sau.
Sammendrag
Epigenetikk er eit ord på veg inn i daglegtalen. No definert som arvelege endringar i framtoninga fenotypen) av eit individ som ikkje skuldast endringar i sjølve sekvensen av arvematerialet (DNA.) Epigenetikk er no eit av dei mest omtala forskingsområda i biologien.
Forfattere
Kjell Andreassen Bernt-Håvard ØyenSammendrag
Fourteen Nordic increment functions have been validated by use of with a test data set from long-term research plots in Norway of even-aged, pure stands of Scots pine, Birch and Norway spruce. In selected functions from Denmark, Finland, Norway and Sweden measures of site productivity, mean tree size and various stand characteristics are represented. Different models display both strengths and weaknesses in their predicting ability. Some measures of precision and bias have been calculated and the functions are ranked due to their performance. Basal area increment models for spruce and pine from Sweden, and a Finish volume increment model for birch has the best fit to the Norwegian test data. Some of the growth models developed outside Norway estimate the growth with about the same accuracy as the models frequently used and developed in Norway. The results indicate that forest conditions and traditional even-aged forest management practice in the Nordic countries seem to have small influence on the relative growth of even-aged stands. By careful recalibration of existing functions from other Nordic countries with data from Norway, a reasonable accuracy could be achieved in Norwegian forest with a reduction of the bias.
Forfattere
Rastislav Solár Janka Dibdiakova Miroslav Mamo Frantiek Kaík Zuzana Rázgová Vladimír Vacek Jozef Sivák Milan GaffSammendrag
A comparable series of specimens from spruce wood were pre-treated with sodium hydroxide, sodium hydroxide and hydrogen peroxide, or per-acetic acid sequences. The pre-treatments reduced the yield of pulps and their Kappa number noticeably, diminished the degree of polymerization moderately, and increased their brightness. One-step peroxide bleaching of pulps from the pre-treated spruce wood resulted in their higher brightness compared to bleached pulp from sound wood. From the viewpoint of improved properties of pulp, the most efficient were the sodium hydroxide/per-acetic acid and per-acetic acid/sodium hydroxide sequences. The pre-treatments did not influence mechanical strength of the obtained pulps significantly.
Sammendrag
Abstract Introductions of the pine wood nematode (PWN), which causes Pine Wilt Disease (PWD), have devastating effects on pine forests in regions with susceptible host trees under suitable climate conditions. Norwegian authorities have proposed a contingency plan if PWN is detected in Norway. We compare the costs of implementing this plan with the costs of further spread and damage of PWN under two climate change scenarios: present and the most likely future climate. With the present climate, PWD will not occur in Norway. Under climatic change, the cost of PWD damage is approximately 0.078- 0.157 million NOK (0.01-0.02 million Euros) estimated as net present value with 2 and 4% p.a. discount rate. In contrast, the corresponding costs of implementing the suggested contingency plan will be 1.7-2.2 billion NOK (0.2-0.25 billion Euros). These costs are caused by reduced income from industrial timber production and the costs of the eradication measures. Costs related to reduced recreation or biodiversity are expected to be very high, but are not included in the above estimates. Many of the factors in the analysis are burdened with high uncertainty, but sensitivity analyses indicate that the results are rather robust even for drastic changes in assumptions. The results suggest that there is a need to revise the current PWN contingency plan in Norway. Keywords: Bioeconomics, boreal forest damage, Bursaphelenchus xylophilus, climate change, impact assessment, stochastic modelling.
Sammendrag
In this report, the oral and poster contributions of the scientific conference “Forest Management and Silviculture in the North – Balancing Future Needs” have been compiled. The conference was arranged 6-8 September 2011 in Stjørdal, Norway, gathering more than 50 delegates from seven countries. The conference was hosted by the Norwegian Forest and Landscape Institute and was initiated jointly by IUFRO WP 1.01.01 Boreal forest silviculture and management and the SNS network group Sustainable forest management in northern Fennoscandia (NORFOR).
Redaktører
Eva Narten HøbergSammendrag
Det er ikke registrert sammendrag
Redaktører
Eva Narten HøbergSammendrag
Det er ikke registrert sammendrag
Redaktører
Eva Narten HøbergSammendrag
Det er ikke registrert sammendrag
Redaktører
Eva Narten HøbergSammendrag
Det er ikke registrert sammendrag