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.
2007
Forfattere
Ronald BjøruSammendrag
Det er ikke registrert sammendrag
Sammendrag
Foredraget presenterer resultat frå forsøk med koparoksyd og koparoksyklorid i låge doseringar mot bærbuskbladflekk (Mycosphaerella ribis) og bærbuskbladfall (Drepanopeziza ribis) i solbær.
Sammendrag
Foredrag om låge dosar av koparfungicid mot bladflekksjukdomar i solbær.
Sammendrag
For instance in France, the number of vertical flow constructed wetland has increased from 0 to more than 400 units between 1992 and 2005. There is a lack of relevant tools for monitoring their functionality and detecting potential failures in the systems. Electrical Resistivity Tomography (ERT) combined with Induced Polarization (IP) could potentially provide such a tool. Preliminary field studies have indicated that spatial variability in the flow pattern can be revealed by time-lapse measurements of electrical resistivity, however the interpretation of these results require better knowledge about the constitutive relationship between electrical properties and water content, water conductivity and biological clogging in typical filter media. A laboratory experiment was conducted using a four-electrode arrangement in soil sampling cylinders. Under controlled water contents the electrical resistivity and IP was measured for different levels of water conductivity and biofilm development. Finally, results were compared with empirical and theoretical relationships
Forfattere
Unni AbrahamsenSammendrag
Artikkelen omhandel sprøyting mot overvintringssopp i høstkorn, hva som påvirker angrep og lønnsomheten ved behandling. Faktorer som tilsier sprøyting er: Områder med langvarig snødekke Store planter/mye bladmasse ved innvintring Redusert jordarbeiding/mye spillkorn Rug Nordvent/skyggefullt areal Anstrengt vekstskifte
Sammendrag
Hvordan skal man beregne økonomien i grønnsaksdyrking på en gard? Tiltak som gjøres ett år påvirker resultatene i påfølgende år. Dårlig jordstruktur på grunn av kjøreskader, eller oppformering av ugras påvirker avlingene, og dermed økonomien.
Forfattere
Ann NorderhaugSammendrag
Det er ikke registrert sammendrag
Forfattere
Svein Solberg Erik NæssetSammendrag
The aim of this article is to present a concept of using airborne laser scanning (LIDAR), with one scan only, to map defoliation as a forest health variable. The idea is to apply two independent algorithms on the LIDAR data set, to produce both actual and expected leaf area index (LAI) values for every cell in a grid over the area. LAI is estimated based on laser pulse penetration through the canopy layer, and expected LAI values are derived from stand density based on position and height of single trees as obtained from a single-tree segmentation algorithm. The results are preliminary findings from four ongoing and related studies. In the first study repeated laser scans had close to equal extinction coefficients for LAI estimation although the instruments and flight specifications were different. In the second study, based on the findings in the first we derived normal LAI values from extisting and large scale data sets with LIDAR and field data. The main independent variable was stand density, defined as the ratio between mean tree height and mean distance between the trees. The ratio between LAI and stand density was around 0.5, and this is a preliminary standard for a healthy pine forest. In a third study the woody area fraction of LAI was estimated from 14 total harvested trees, and turned out to be slightly below 50% for a healthy pine tree, which means that a totally defoliated pine forest would have an LAI/stand density ratio around 0.2. In the fourth study, these LAI standard values were confirmed with LIDAR data from a severe insect defoliation event in Norway 2005. In conclusion, the present preliminary results demonstrate a potential for application of airborne laser scanning for monitoring or mapping of defoliation as a forest health variable.
Forfattere
Celine ReboursSammendrag
Laminaria has been known in Asia, first as kunbu ("large cloth") and, more recently, as haidai ("sea ribbon"). Internationally, "kelp" is generally used. The main extracted products are alginate, iodine and mannitol, which are used in textile, printing, medical and food manufacturing industries. Laminaria in its whole is also used in a huge variety of products for human consumption. In Europe, the exploited species have been L. digitata, hyperborea and saccharina. Mostly harvested as source of saltworth and iodine, wild thallus have also been used as fertizers in agriculture. In 2005, Laminaria is still harvested as alginates sources in Norway (L. hyperborea : 153 906 t) and France (L. digitata : 74 778 t). No cultivation is actually in place. In the late 1920s, the commercial seaweed Laminaria japonica was introduced into China from Hokkaido (Japan). Although commercial production of kelp harvested from its natural habitat has been carried out in Japan for over a century, mariculture of this cold water species on a very large commercial scale has been realized in China in the 1950s. Since, the Chinese kelp production increased from about 60 000 t annually to over 4 millions tones in 2005, making China the world largest producer of Laminaria. The Chinese success of the kelp cultivation in Asia has mainly depended on the adoption of three important techniques: the floating raft method, low temperature cultivation of summer seedlings, and application of nitrogen fertilizer in the open sea. The Chinese methods that have made Laminaria production successful are shortly described in this poster.
Sammendrag
Norsk Institutt for Skog og Landskap har etter oppdrag for Tove Bringsvær, Bø ajourført markslag og kartlagt jordsmonnet på dyrka mark på garden Haugehåtveit nedre i Tokke kommune. Jordsmonn og markslag er kartlagt etter gjeldande instruksar og etter gjeldande retningsliner for partsnøytral informasjon frå instituttet. Markslaget blei først kartlagt i 1971, og seinare ajourført basert på fotografering frå 1999. Siste ajourføring skjedde etter feltkontroll 20.-21. mai 2007. Då blei også jordbruksarealet jordsmonnkartlagt. Feltkontrollen førte til endra markslag for tre areal på grunn av omfanget av gjengroing (Figur 2-1, Figur 2-4, Figur 2-6). Den dyrka marka består av djup morenejord dominert av grushaldig siltig mellomsand. Stein- og blokkinnhaldet i øvre ½ meter er vurdert til 5-10m3 per dekar og hellingsgraden varierer mellom 10 - 20%. Klimaforholda er viktigaste begrensande faktor for jordbruksproduksjon. Delar av arealet treng grøfting. Gardskartet viser eit totalareal på 414,9 dekar. Av dette er 25,8 dekar fulldyrka, lettbrukt jord, 367,2 dekar skog med middels bonitet og 10,3 dekar skog med høg bonitet.