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
Forfattere
Geir Kjølberg Knudsen Anders AakSammendrag
Det er ikke registrert sammendrag
Sammendrag
The main goal of this study was to develop an alternative bedding material for cattle and sheep based on locally produced woodchips from birch trees and Sphagnum peat in Northern Norway. Four litter mixtures; 2.5 and 5.0 cm woodchips, with and without 20 % peat of total volume were studied in A) Four pens sized 20.4 m2 with two cattle each, ie one pen per treatment; B) Eight pens sized 21.2 m2 with seven ewes each, ie two pens per treatment, and two similar sheep pens with deep straw (barley) as controls. The number of lying animals was counted in 10 minutes’ intervals from 6 pm to 6 am for two consecutive days and the mean number of animals lying simultaneously per pen and hour, was calculated. The cleanliness of the animals was assessed within three separate body sections (legs, side, rear) using a scale from 0-2 points for each body part (0 p=clean, 6 p=dirty). The proportion of animals lying simultaneously per pen and hour and individual cleanliness scores were analysed by GLM. No differences in lying behaviour and cleanliness between the four woodchips mixtures were found, neither for sheep nor cattle. However, straw bedding resulted in the least dirty ewes (P
Forfattere
Liv Guri VelleSammendrag
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Forfattere
Ingunn M. VågenSammendrag
Foredrag om løkens sunnhet og fortreffelighet på forskningstorg ved Universitetet i Agder, Grimstad, i forbindelse med Forskningsdagene 2011.
Forfattere
PublikasjonsforfatterSammendrag
Foredrag under Bioforsk-konferansen 2011. Her er beregna lønnsomhet av ulik grovfôrkvalitet/ høsteintensitet ved mjølkeproduksjon i fjellbygdene, basert på resultater fra plante- og fôringsforsøk i prosjektet Mer og bedre grovfôr. Konklusjoner - utdrag: •Arealtilgang påvirker bruk av gjødsel og kraftfôr og om det lønner seg å slå gras til mjølkekyr på et tidlig utviklingstrinn. •Liten til mer enn typisk arealtilgang: Normal slått svarte seg best. •Rikelig tilgang på (billige) arealer i forhold til kvote eller fjøsplass: Tidlige slåtteregimer lønner seg. •Relevans for ønsket om mer norsk matproduksjon (knapphet på dyrka jord): Høgere mjølkeavdrått per ku ved tidlig slått, men mer mjølk per daa ved normal slått Les/last ned PDF av presentasjon under "Les meir" til høyre.
Sammendrag
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Forfattere
Frode VeggelandSammendrag
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Forfattere
Tore SkrøppaSammendrag
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Forfattere
Andrea FickeSammendrag
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Forfattere
Christer Magnusson Ricardo HolgadoSammendrag
Some species of plant parasitic nematodes restrict severely the productivity of crops. In Nordic countries nematodes are often overlooked as factors explaining crop failure. This neglect may relate to a 2/3 reduction of personnel in Nordic nematology which has happened since 1994. The resulting decrease in the lecturing and training of students threatens recruitment, scientific development and awareness of plant nematodes as parasites. This is serious since damage from nematodes can only be reduced by correct management of populations. This will contribute to soil health and a sustainable production. Potato cyst nematode (PCN), Globodera spp., is economically the most important pest attacking potato. It is difficult to detect in the fields, and 20 years may elapse before damage is noticed. The cost for managing PCN is high since management relies on intensive monitoring and regulation. PCN is mainly managed by crop rotations with non-hosts crops grown between alternating susceptible and resistant potato. Among cereal cyst nematodes (CCN) the most common species are Heterodera.avenae and H. filipjevi. Both species have pathotypes differing in their host preferences. Under Nordic conditions serious damage seems to appear with about 40-years intervals. For CCN, correct knowledge of species, pathotype and population density is essential in designing crop rotations. Optimal rotations may allow for yield increases of up to 1 t/ha. In Norway and Sweden damage from root knot nematodes (RKN), Meloidogyne hapla on vegetables and M. naasi on cereals, has been detected more frequently in recent years. RKN have their largest importance in continental and southern Europe, and the increase in field damage seen in the Nordic area may be a first sign of climate change. It is likely that also damage from other nematodes will increase with rising temperatures. Research cooperation between Nordic countries seems urgent to meet the future challenges in plant nematology.