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
Arnfinn Nes Bjørn Hageberg Jørn HaslestadSammendrag
Resultat av forsøk med ulik skjæring og tynning ved dyrking av bringebær er presenterte. Bærstorleiken var ikkje påverka av høgda på skota eller av kor tett dei stod. Avlinga både pr dekar og pr skot auka litt når skota vart toppa over 160 cm samanlikna med 140 cm. Når tal skot pr meter rad auka frå 6 til 10, auka avlinga pr dekar med neste 40 prosent.
Forfattere
Arnfinn Nes Bjørn Hageberg Jørn HaslestadSammendrag
Forsøk med ulik toppehøgd og ulikt plantetal i radene ved dyrking av bringebærsorten ’Glen Ample’ synte at når skota vart toppa til 160 cm i staden for 140 cm, auka avlinga pr dekar i middel av to år berre med om lag 8 prosent og avling pr skot med 6 prosent. Når tal skot pr meter planterad vart auka frå 6 til 8 eller 8 til 10, auka avlinga pr dekar i same perioden med 10 prosent og 22 prosent. Avlinga pr dekar auka i middel for åra med 34 prosent når tal skot auka frå 6 til 10 pr meter rad. Avlinga pr skot vart samstundes redusert med 18 prosent. Korkje bærstorleiken, åtak av stengelsjukdomar eller fordelinga av knopptypane var påverka av behandlingane.
Populærvitenskapelig – Døde trær i Nordmarka
Ken Olaf Storaunet, Jørund Rolstad, Erlend Rolstad, ...
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Early cut organic grass silage was compared with silage harvested 17 days (180 daydegrees) later in a continuous production experiment with 32 Norwegian Red dairy cows in early lactation. A half of the cows received a feed ration with 40% concentrates (H), and the other half 10% (L) on an annual energy basis. Early cut resulted in lower crop yields (2.17 t DM/ha) compared with normal cut (4.66 t DM/ha). Energy and protein concentrations were higher for early cut than for normal cut silage (6.4 vs. 5.6 MJ NEl, as assessed by NIRS, 136 vs. 105 g/kg DM CP). Feeding early cut silage of an organic ley increased feed intake. Cows at H produced 27.5 kg ECM per day with early cut silage and 25.3 kg ECM with normal cut silage, and cows at L produced respectively 24.7 and 22.4 kg ECM. Cows offered early cut silage had highest milk protein concentration (H: 34.6 vs. 32.8; L: 34.4 vs. 31.4 g/kg). In the present experiment the harvesting time did not influence the sensoric quality of milk, but low concentrate level reduced the milk taste slightly. Therefore early cut may only be recommended to farmers in northern Norway when acerage is not a limiting factor.
Sammendrag
According to previous studies, short day (SD) treatment may increase frost hardiness in Picea abies (L.) Karst. seedlings during shoot elongation the next year. The purpose of this study was to examine how timing of the SD treatment affects spring frost hardiness. The following four treatments were applied in the first growth period: natural photoperiod (Nat), or SD treatment (8/16 h, day/night) either from 14-28 July (SD1), 28 July-11 August (SD2), or 11 20 August (SD3). After 125 days in the cold store (October-January), the seedlings were transferred to forcing conditions (20-25oC, 24 h photoperiod) followed by freezing tests at 3, -5, -7 and 9oC when most seedlings had reached bud break stage 7 (Krutzsch index). Seedling height measurements and analyses of carbohydrate status, nitrogen concentration and dry weight of needles after cold storage were done to examine the treatments` impact on seedling quality. SD treatment reduced visual freezing injury to current- and first-year shoots. Mortality occurred at –7 and –9oC and was significantly higher in treatments Nat and SD1 (43% in both) than in the SD2 (23%) and SD3 (15%) treatments. Seedlings from the late SD treatments also showed better height growth and developed more shoots from dormant buds after freezing to –3 and –5oC. Collectively, these findings demonstrate the importance of proper timing of the SD treatment in relation to the seedlings’ natural growth rhythm.
Forfattere
Richard MeadowSammendrag
Det er ikke registrert sammendrag
Forfattere
Johannes Deelstra P.A. Sukhanov Sh.T. Daishev A.Yu. Pertsovich V.N. Soboleva M. Hoffman N. BergmanSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Results from a literature review on pinewood ecology, silviculture, genetics, aspects of history and forest resources of Scots pine (Pinus sylvestris L.) in western Norway are presented. The pinewoods cover 40 per cent of the forested land, 0.31 million ha. During the last 75 years, the area has increased by 17 per cent and the growing stock has risen from 10 to 34 million m3. The impact of man in previous times was very marked, and has had a significant influence on the present forest conditions. The pronounced climatic gradients mixed with the topographic variation - from the coastal plains via the fjord systems to the high mountains - is reflected in rather steep gradients in the pine forest vegetation. Various floristic elements can be distinguished, from oceanic via the suboceanic in the outer islands to the thermophytic, boreonemoral and boreal elements in the inner fjord districts and valleys. The introduction of spruce (Picea spp.) plantations on 10-15 per cent of former native pine forests has not negatively affected the bird fauna at the landscape scale. Although not particular species rich, the pine forests harbour species usually not found in other forest types. So far, most work in the field of silviculture and forest ecology in the pinewoods of West Norway has been in the form of case studies. Implications of the results for forestry in the region are briefly discussed.
Sammendrag
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