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
Svein EilertsenSammendrag
Enkelte steder i Norge er tapene av lam til fredet rovvilt store. I et beiteforsøk på permanente innmarksbeiter i lavlandet ble tilveksten hos lam forsøkt oppprettholdt ble det i et beiteforsøk prøv
Forfattere
Inger Sundheim Fløistad Hans Martin HanslinSammendrag
The Christmas tree seedlings typically appear with initial slow growth during the first 2-3 years. In the next couple of years the trees grow well, and then during the final 2-3 years before harvest the growth frequently is too vigorous. This growth rhythm often requires laborious growth regulation by mechanical or chemical methods. A dense concentration of branches on the lower part of the tree tends to allocate a lot of resources to the tree base, which grows wide and heavy. Such trees are costly to cut and transport and difficult to sell. Therefore, the growers want transplants with rapid growth after planting. To satisfy their demand there is a need for better plant materials than what are available today. More knowledge is needed about the relation between seedling quality, their physiological status and the plants response to different planting dates. In the year 2007 a new project "Seedling qualities and establishment routines for a rapid growth start of Abies nordmanniana and Abies lasiocarpa for Christmas tree production" was established in Norway to improve our knowledge of establishment of Christmas trees. Financial support is given by the Norwegian Research Council, "Skogtiltaksfondet" and "Forskningsfondet for Norsk Pyntegrønt Forsøksring".
Forfattere
Bent J Nielsen Jens G Hansen Hans Pinnschmidt Ragnhild Nærstad Arne Hermansen Vinh Hong Le Asko HannukkalaSammendrag
Influence of weather conditions on sporangia production, release, viability and infection of potato late blight (Phytophthora infestans) was investigated in Denmark, Norway and Finland using Burkard spore traps and exposure of trap plants in field plots. High amounts of sporangia were trapped after night with long periods with high relative humidity. Sporangia produced in one humidity period were mainly released at the first humidity drop in the morning hours, but there were also some "delayed sporangia release". Local new infections occurred mainly during the morning hours when the leaves were still wet. On many days sporangia did not survive until the afternoon and the results indicate that conditions for survival of sporangia and infection are major bottlenecks for the spread and development of the disease
Forfattere
Helge SjursenSammendrag
De viktigste ugrasartene ved frødyrking er balderbrå, markrapp, kveke, tunrapp og knereverumpe.
Forfattere
May Bente Brurberg Arne Hermansen Abdelhameed Elameen Vinh Hong Le Björn Andersson Asko Hannukkala Bent Nielsen Jens G Hansen Jens G YuenSammendrag
Phytophthora infestans was isolated from potato leaves collected from 200 fields located in different parts of Finland, Denmark, Sweden and Norway in 2003. Sampling was carried out relatively late in the epidemic. The SSR analysis was carried out in Norway. Nine SSR markers were tested; Pi4B, Pi4G, PiG11, Pi02, Pi04, Pi16, Pi26, Pi33 and D13. Based on only 7 SSR markers 190 genotypes were found. Six genotypes occurred twice and one genotype occurred six times. The high genetic variation indicates sexual reproduction in the Nordic late blight population
Forfattere
Ragnhild Nærstad Arne Hermansen Vinh Hong Le Andrew Dobson Jafar Razzaghian Eldrid Lein MoltebergSammendrag
The effect of different end of season treatements of the haulm on tuber blight has beeen investigated in a five year project. Haulm killing reduced the amount of inoculum in the haulm and soil and the amount of tuber blight compared to harvest on green haulm treated with fungicide. The infectivity of the soil was reduced to about the half in three weeks and the infectivity persistes longer in dry soil than in wet soil. Most of the inoculum washed down from the haulm remaines in the top soil, at 15 mm precipitation in pot experiments.
Forfattere
Berit NordskogSammendrag
Biologi og bekjempelse av bladskimmelpatogen ble presentert
Sammendrag
Foreløpige resultater på effekt av endring i temperatur, CO2-konsentrasjon og lysnivå på høsttilvekst og overvintringsevne hos de flerårige ugrasartene kveke, åkertistel og åkerdylle ble presentert.
Forfattere
Arne HermansenSammendrag
Biololgi og bekjempelse av kålbladskimmel og algesoppråte i korsblomstra veskter ble presentert
Forfattere
Arne HermansenSammendrag
Ulike soppsjukdommer i løk ble presentert