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.
2006
Forfattere
Marianne BechmannSammendrag
14 bekker små...
Sammendrag
The stiffest rods will create the longest casts! This is a common assumption made by many fly casters, but is it really accurate? What follows are the results of a test that examined this hypothesis by combining length measurements of rod stiffness using the Common Cents System (CCS). The test utilized eigth casters, all of them whom cast eight rods. Each caster made four casts with each rod. The article originally appeared in the Norwegian magazine "Alt om Fiske" in October 2006
Sammendrag
Stive stenger kaster lengst, hevder mange fluefiskere. I denne testen undersøker vi om påstanden stemmer. Vi lar åtte kastere få fire kast hver med åtte forskjellige stenger under like forhold. Så sammenligner vi resultatene med såkalte CCS-målinger.
Forfattere
Heleen A. de Wit Taru Palosuo Gro Hylen Jari LiskiSammendrag
Growing stocks of trees in Europe have increased in a magnitude that is significant in terms of carbon (C) sink strength. Estimates of the soil C sink strength that this increased stock of trees may have induced on a regional scale are scarce, uncertain and difficult to compare. This illustrates the need for a widely applicable calculation method. Here, we calculate a C budget of productive forest in southeast Norway based on forest inventory information, biomass expansion factors (BEF), biomass turnover rates and the dynamic soil model Yasso. We estimate a 29% increase (112-145 Tg) of C in biomass between 1971 and 2000, and estimate the associated increase of C in soils (including dead wood) to be 4.5% (181-189 Tg). The C sink strengths in biomass and soils (including dead wood) in 1990 are 0.38 and 0.08 Mg ha(-1) yr(-1), respectively. Estimated soil C density is 58 Mg C ha(-1) or ca 40% of measured soil C density in Norwegian forest soils. A sensitivity analysis - using uncertainty estimates of model inputs and parameters based on empirical data - shows that the underestimation of the soil C stock can be due to overestimation of decomposition rates of recalcitrant organic matter in the soil model and to including only trees as a source of litter. However, uncertainty in these two factors is shown to have a minimal effect on soil sink estimates. The key uncertainty in the soil sink is the initial value of the soil C stock, i.e. the assumed steady state soil C stock at the start of the time series in 1970. However, this source of uncertainty is reduced in importance for when approaching the end of the data series. This indicates that a longer time series of forest inventory data will decrease the uncertainty in the soil sink estimate due to initialisation of the soil C stock. Other, less significant, sources of uncertainty in estimates of soil stock and sink are BEF for fine roots and turnover rates of fine roots and foliage. The used method for calculation of a forest C budget can be readily applied to other regions for which similar forest resource data are available.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Sonja Klemsdal jihong liu clarke Arash Haghanizadeh Oleif ElenSammendrag
Det er ikke registrert sammendrag
Forfattere
Sonja Klemsdal A. Haghanizadeh Oleif ElenSammendrag
A fungal endochitinase gene, ech42 from Trichoderma atroviride, has been incerted in barley resulting in increased resistance towards Fusarium culmorum infection. The F. culmorum resistance was found to be stable when tested in the T3 generation
Forfattere
Bernard Slippers Rimvis Vasiliauskas Brett Hurley Jan Stenlid Michael J. WingfieldSammendrag
The Forestry and Agricultural Biotechnology Institute, University of Pretoria and the Department of Forest Mycology and Pathology, Swedish University of Agricultural Biotechnology Institute, Uppsala, Sweden are collaborating on a study of the Siricid-Fungal symbiosis, and its parasites. This project aims to address questions in two general areas, namely (a) the evolution and biology of mutualistic symbiosis and (b) the monitoring and control of wood inhabiting pests and pathogens that threaten biodiversity and forest production in introduced and native environments...
Forfattere
Andreas TreuSammendrag
Det er ikke registrert sammendrag
Sammendrag
A new compact wastewater treatment system for use in single houses has been constructed in eastern Norway. The system is based on the principles of sub-surface flow constructed wetlands using various types of Filtralite as filter media. It consists of a septic tank followed by an aerobic biofilter succeeded by an upflow saturated filter. The aerobic biofilter is essential to remove organic matter and achieve nitrification, while the upflow filter polishes the wastewater and removes microorganisms and phosphorus. During the first 3 years of operation, the system has show stable and high removal with the following average values measured from the outlet of septic tank to the outlet of the upflow filter: 97.0%-BOD7, 30%-N, 99.4%-P, and 70.8%-SS. No Escherichia coli or somatic coliphages have been detected in the effluent. Due to considerable removal of organic mater, nutrients, and pathogens, the effluent will not negatively affect water and soil ecosystems. The system requires low maintenance and is designed to remove phosphorus for 5 years before renewal of the upflow filter media. When saturated with phosphorus, the media is a suitable fertilizer for plant production. (c) 2006 Elsevier B.V. All rights reserved.